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Wireless Transfer App 3.7 iOS - Multiple Web Vulnerabilities
From: Vulnerability Lab <research () vulnerability-lab com>
Date: Thu, 05 Dec 2013 14:02:34 +0100

Document Title:
===============
Wireless Transfer App 3.7 iOS - Multiple Web Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1152


Release Date:
=============
2013-12-04


Vulnerability Laboratory ID (VL-ID):
====================================
1152


Common Vulnerability Scoring System:
====================================
6.7


Product & Service Introduction:
===============================
Wireless Transfer App is an easy to use photo and video transfer tool. It helps you easily and quickly transfer photos 
and videos 
between iPhone and iPad, as well as transfer photos and videos from computer to iPad/iPhone/iPod and vice verse. With 
Wireless 
Transfer App, you can transfer photos and videos from iPad to iPad, from iPad to iPhone, from iPhone to iPad, from 
iPhone to iPhone, 
from computer to iPad, from iPhone to computer and more. There is no need for USB cable or extra software. You just 
need to put your 
devices under the same Wi-Fi network.

(Copy of the Homepage: https://itunes.apple.com/en/app/wireless-transfer-app-share/id543119010 & 
http://www.wirelesstransferapp.com/ )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered multiple command/path inject vulnerabilities in the Wireless 
Transfer App v3.7 for apple iOS.


Vulnerability Disclosure Timeline:
==================================
2012-11-30:     Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Wireless Transfer App COM
Product: Wireless Transfer App 3.7


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


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


Technical Details & Description:
================================
A local command/path injection web vulnerability has been discovered in the Wireless Transfer App v3.7 for apple iOS.
The vulnerability allows to inject local commands via vulnerable system values to compromise the apple mobile iOS 
application.

The vulnerability is located in the in the album name value of the wireless transfer app index and sub category list 
module.
Remote attackers are able to manipulate iOS device - `photo app` (default) album names. The execute of the injected 
command/path request occurs in the album sub category list and the main album name index list. The security risk of the 
command/path inject vulnerabilities are estimated as high(-) with a cvss (common vulnerability scoring system) count of 
6.7(-).

Exploitation of the command/path inject vulnerability requires a local low privileged iOS device account with 
restricted access 
and no direct user interaction. Successful exploitation of the vulnerability results unauthorized execution of system 
specific 
commands or unauthorized path requests.

Vulnerable Application(s):
                                [+] Wireless Transfer App v3.7

Vulnerable Parameter(s):
                                [+] album name
                                [+] photoGallery_head - album

Affected Module(s):
                                [+] Index - Album Name List
                                [+] Sub Category - Title Album Name List


Proof of Concept (PoC):
=======================
The local command inject web vulnerabilities can be exploited by local low privileged device user accounts with low 
user interaction. For security demonstration or to reproduce the vulnerability follow the information and steps below. 

Manual steps to exploit the vulnerability ...

1. Install the wireless transfer v3.7 iOS mobile application
2. Open the default Photo app of your iOS device
3. Include an album with the following payload  `">%20<x src=\..\<../var/mobile/Library/[x application path]>` and save 
it
4. Switch back to the installed wireless transfer app and start the wifi transfer
5. Open the local web-server url http://localhost:6688/ (default link)
6. The local path/command execute occurs in the album name value of the photoGallery_head class
7. Successful reproduce of the vulnerability! 


PoC: Album Name - photoGallery_head in the Album Sub Category List

<div class="header">
  <div class="logo"> <a href="index.html"><img src="images/logo.png" alt="logo"></a> </div>
  <div class="title"><a href="index.html"><img src="images/title4.png" alt="logo"></a></div>
  <div class="button"><a href="upload.html"><img src="images/anniuda2.png" alt=" "></a></div>
  <div class="photoGallery_head">
<div class="phga_hd_left">Album : ">%20<x src=\..\<../[COMMAND/PATH INJECT VULNERABILITY IN ALBUM NAME BY 
photoGallery_head CLASS!]></div>
  <div class="phga_hd_right">
    <input value="Zurück zur Sammlung" class="back" type="button">
  </div>
</div>
</div>


PoC: Album Name - photoalbum in the Album Index List

<div class="photo_list">
<dl><dt class="photoalbum" alt="D579B80C-B73D-4A16-9379-FB29A6CFC12C"><a 
href="albumhtm?id=D579B80C-B73D-4A16-9379-FB29A6CFC12C">
<img src="/albumimg_D579B80C-B73D-4A16-9379-FB29A6CFC12C.jpg" height="100" width="100"></a></dt>
<dd>>%20<x src=\..\<../[COMMAND/PATH INJECT VULNERABILITY IN ALBUM NAME BY photoalbum!]>(125)</dd></dl> 
<dl><dt class="photoalbum" alt="632F9F75-1B7A-41E4-8070-E62B1ECC780A"><a 
href="albumhtm?id=632F9F75-1B7A-41E4-8070-E62B1ECC780A">
<img src="/albumimg_632F9F75-1B7A-41E4-8070-E62B1ECC780A.jpg" height="100" 
width="100"></a></dt><dd>Fotoarchiv(0)</dd></dl> 
<dl><dt class="photoalbum" alt="C44B3062-3A67-4BFA-AF16-04CC8DE2CD29"><a 
href="albumhtm?id=C44B3062-3A67-4BFA-AF16-04CC8DE2CD29">
<img src="/albumimg_C44B3062-3A67-4BFA-AF16-04CC8DE2CD29.jpg" height="100" 
width="100"></a></dt><dd>WallpapersHD(3)</dd></dl> 


Reference(s):
http://localhost:6688/index.html
http://localhost:6688/albumhtm
http://localhost:6688/albumhtm?id=
http://localhost:6688/albumhtm?id=D579B80C-B73D-4A16-9379-FB29A6CFC12C


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure encode and parse of the vulnerable album name value. 
Parse and filter also the index and sub category output list to ensure it prevents local command/path requests.


Security Risk:
==============
The security risk of the local command/path inject web vulnerability is estimated as high.


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


Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all 
warranties, 
either expressed or implied, including the warranties of merchantability and capability for a particular purpose. 
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of business 
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damages. Some 
states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing 
limitation 
may not apply. We do not approve or encourage anybody to break any vendor licenses, policies, deface websites, hack 
into databases 
or trade with fraud/stolen material.

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                                Copyright © 2013 | Vulnerability Laboratory [Evolution Security]



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