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PhotoSync 1.1.3 Android - Command Inject Vulnerability

Document Title:
===============
PhotoSync 1.1.3 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 s-dz@xxxxxxxxxx


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=========================
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