PhotoSync 1.1.3 Command Injection

`Document Title:  
===============  
PhotoSync v1.1.3 Android - Command Inject Vulnerability  
  
  
References (Source):  
====================  
http://www.vulnerability-lab.com/get_content.php?id=1410  
  
  
Release Date:  
=============  
2015-01-21  
  
  
Vulnerability Laboratory ID (VL-ID):  
====================================  
1410  
  
  
Common Vulnerability Scoring System:  
====================================  
5.2  
  
  
Product & Service Introduction:  
===============================  
Its all about one thing – the best and easiest way to transfer, backup and share your photos and videos! PhotoSync allows you to transfer your   
photos and videos between your Android device, iPhone / iPad and computer over your local Wi-Fi network.  
  
(Copy of the Vendor Homepage: https://play.google.com/store/apps/details?id=com.touchbyte.photosync )  
  
  
Abstract Advisory Information:  
==============================  
An independent vulnerability laboratory researcher discovered a command inject web vulnerability in the official PhotoSync v1.1.3 Android mobile web-application.  
  
  
Vulnerability Disclosure Timeline:  
==================================  
2015-01-21: Public Disclosure (Vulnerability Laboratory)  
  
  
Discovery Status:  
=================  
Published  
  
  
Affected Product(s):  
====================  
Touchbyte GmbH  
Product: PhotoSync - Android Mobile Web Application 1.1.3  
  
  
Exploitation Technique:  
=======================  
Local  
  
  
Severity Level:  
===============  
Medium  
  
  
Technical Details & Description:  
================================  
A local command inject web vulnerability has been discovered in the official PhotoSync 1.1.3 Android mobile web-application.  
The vulnerability allows remote attackers to inject own commands by usage of stored manipulated system/device values to   
compromise the android mobile web-application.  
  
The command inject vulnerability is located in the vulnerable `albumname` value of the `uploadImageAlbumSelect` module.   
Local attackers are able to inject own malicious system specific commands or local path value to requests by usage of   
the vulnerable `albumname` value. The execution of the command occurs in the `listAlbum` module of the mobile application.   
Attackers are able to manipulate the local default photo app albumname values to provoke with a client-side GET method   
request the command injection. The attack vector is located on the application-side and the injection requires physical   
device access or a local low privileged device user account. Local attackers are also able to exploit the albumname   
validation issue in combination with persistent injected script codes.  
  
The security risk of the local command/path inject vulnerability is estimated as medium with a cvss (common vulnerability   
scoring system) count of 5.2. Exploitation of the command/path inject vulnerability requires a low privileged android device   
account with restricted access and no user interaction. Successful exploitation of the vulnerability results in unauthorized   
execution of system specific commands and unauthorized path value requests to compromise the mobile iOS application and the   
connected device components.  
  
  
Request Method(s):  
[+] [GET]  
  
Vulnerable Module(s):  
[+] uploadImageAlbumSelect  
  
Vulnerable Parameter(s):  
[+] albumname & name  
  
Affected Module(s):  
[+] listAlbum  
  
  
Proof of Concept (PoC):  
=======================  
The local command inject web vulnerability can be exploited by local attackers (network) 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 Session Logs [GET] (Execution) ---  
Status: 200[OK]  
GET /uploadImageAlbumSelect/%3;[LOCAL COMMAND INJECTION VULNERABILITY!]%3E HTTP/1.1  
Host: 192.168.1.4:8080  
User-Agent: Mozilla/5.0 (Windows NT 5.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: fr,fr-fr;q=0.8,en-us;q=0.5,en;q=0.3  
Accept-Encoding: gzip, deflate  
Cookie: WSPref=0%2C3%2C0%2Cemmc%2Cdefault%2C1; skey=  
Connection: keep-alive  
  
  
PoC: uploadImageAlbumSelect  
  
<body>  
<div id="page_margins">  
<div id="page">  
<div class="head">  
<div class="nologo">  
<div class="buttons-left">  
<a class="button" href="/listAlbum/;[LOCAL COMMAND INJECTION VULNERABILITY!]" id="backurl" name="backurl"><span class="l"></span>  
<span class="m">Back</span><span class="r"></span></a>  
</div>  
<div class="buttons-right">  
</div>  
</div>  
</div>  
  
  
  
Reference(s):  
http://localhost:8080/  
http://localhost:8080/uploadImageAlbumSelect/  
  
  
Security Risk:  
==============  
The security risk of the local command inject web vulnerability in the photosync application is estimated as medium. (CVSS 5.2)  
  
  
Credits & Authors:  
==================  
Hadji Samir [email protected]  
  
  
Disclaimer & Information:  
=========================  
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