Jump to content

Hacker Technology

A group blog by Leader in Hacker Website - Providing Professional Ethical Hacking Services

  • Entries

    16114

  • Comments

    7952

  • Views

    86382580

Contributors to this blog

  • HireHackking 16114

About this blog

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://code.google.com/p/google-security-research/issues/detail?id=655

The following crash due to a stack-based buffer overflow can be observed in an ASAN build of Wireshark (current git master), by feeding a malformed file to tshark ("$ ./tshark -nVxr /path/to/file"):

--- cut ---
==3325==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fff80063d1c at pc 0x0000004aaf56 bp 0x7fff80063a50 sp 0x7fff80063200
WRITE of size 202 at 0x7fff80063d1c thread T0
    #0 0x4aaf55 in __asan_memcpy llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc:393
    #1 0x7fb265728fad in file_read wireshark/wiretap/file_wrappers.c:1222:13
    #2 0x7fb2658ae866 in wtap_read_bytes_or_eof wireshark/wiretap/wtap.c:1363:15
    #3 0x7fb265783fac in mp2t_find_next_pcr wireshark/wiretap/mp2t.c:178:14
    #4 0x7fb265782bfa in mp2t_bits_per_second wireshark/wiretap/mp2t.c:236:10
    #5 0x7fb2657823a0 in mp2t_open wireshark/wiretap/mp2t.c:363:14
    #6 0x7fb265716911 in wtap_open_offline wireshark/wiretap/file_access.c:1042:13
    #7 0x51bd1d in cf_open wireshark/tshark.c:4195:9
    #8 0x51584e in main wireshark/tshark.c:2188:9

Address 0x7fff80063d1c is located in stack of thread T0 at offset 220 in frame
    #0 0x7fb265783cdf in mp2t_find_next_pcr wireshark/wiretap/mp2t.c:170

  This frame has 1 object(s):
    [32, 220) 'buffer' <== Memory access at offset 220 overflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
      (longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-overflow llvm/projects/compiler-rt/lib/asan/asan_interceptors.cc:393 in __asan_memcpy
Shadow bytes around the buggy address:
  0x100070004750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x100070004760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x100070004770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x100070004780: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00
  0x100070004790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x1000700047a0: 00 00 00[04]f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00
  0x1000700047b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1000700047c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1000700047d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x1000700047e0: f1 f1 f1 f1 00 f2 f2 f2 00 f2 f2 f2 02 f2 02 f2
  0x1000700047f0: 04 f3 f3 f3 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
  Heap right redzone:      fb
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack partial redzone:   f4
  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
==3325==ABORTING
--- cut ---

The crash was reported at https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=11820. Attached are two files which trigger the crash.


Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/38997.zip