PhotoSync v1.1.3 Android - Command Inject Vulnerability Jan 21 2015 10:49AM
Vulnerability Lab (research vulnerability-lab com)
Document Title:
PhotoSync v1.1.3 Android - Command Inject Vulnerability

References (Source):

Release Date:

Vulnerability Laboratory ID (VL-ID):

Common Vulnerability Scoring System:

Product & Service Introduction:
Its all about one thing â?? 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:

Affected Product(s):
Touchbyte GmbH
Product: PhotoSync - Android Mobile Web Application 1.1.3

Exploitation Technique:

Severity Level:

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]
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

<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 class="buttons-right">


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 (at) hotmail (dot) fr [email concealed]

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