VeryPhoto v3.0 iOS - Script Code Inject Web Vulnerability

Document Title:
===============
VeryPhoto v3.0 iOS - Script Code Inject Web Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1401


Release Date:
=============
2015-01-13


Vulnerability Laboratory ID (VL-ID):
====================================
1401


Common Vulnerability Scoring System:
====================================
5.6


Product & Service Introduction:
===============================
VeryPhoto Pro is your side of the most powerful local album management software that allows you to easily manage your massive photos, 
while giving you an unprecedented user experience. No in-app purchase, no functional limitations. album password - effectively protect 
your privacy. multi-touch browsing - Personalized operation allows you to have a different user experience. professional photo editing 
features - lets you easily have a professional-grade graphics processing technology. 

(Copy of the Vendor Homepage: https://itunes.apple.com/de/app/veryphoto-pro-album-password/id720810114 )


Abstract Advisory Information:
==============================
The vulnerability laboratory research team discovered an application-side web vulnerability in the official VeryPhoto v3.0 iOS mobile web-application.


Vulnerability Disclosure Timeline:
==================================
2015-01-13: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Cheng Chen
Product: VeryPhoto - iOS Web Application (WiFi) 3.0


Exploitation Technique:
=======================
Local


Severity Level:
===============
Medium


Technical Details & Description:
================================
A script code inject web vulnerability has been discovered in the official VeryPhoto v3.0 iOS mobile web-application.
The vulnerability allows local attackers to inject own malicious script codes to the application-side of the vulnerable module.

The script code injection web vulnerability is located in the vulnerable `albumname` parameter of the `HTTP Wifi Server`.
Local attackers are able to inject own malicious script codes to the application-side by usage of the vulnerable `albumname` value. 
The execution of the injected payload occurs in the `VeryPhoto - File Dir Index Listing` of the http wifi interface application.
The injection point is the vulnerable Albumname (Edit/Add) function. Attackers are able to manipulate the local albumname values 
by a rename of the inner mobile applicationd data. The attack vector is located on the application-side and request method to 
inject is PUT.

The security risk of the web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 5.6. 
Exploitation of the vulnerability requires a low privileged iOS device account with restricted access and low user interaction. 
Successful exploitation of the vulnerability results in the execution of malicious inject script codes on the application-side.

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

Vulnerable Module(s):
				[+] Album

Vulnerable Parameter(s):
				[+] albumname

Affected Module(s):
				[+] VeryPhoto - File Dir Index Listing (http://localhost:8080/)


Proof of Concept (PoC):
=======================
The script code 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.

Manual steps to reproduce the vulnerability ...
1. Install the VeryPhoto Pro Album v3.0 iOS application (https://itunes.apple.com/de/app/veryphoto-pro-album-password/id720810114)
2. Open in the device menu the default photo album app of apple (iphone/ipad)
3. Add a new album and change the name to local command that should be injected
4. Save the settings and open the VeryPhoto Pro Album application
5. Start the Wifi service
6. Surf with a local network device to the local web-server (localhost:8080)
Note: The execution of the command inject occurs after the wifi interface index has been visited. The vulnerable value that executes the command is the albumname.
7. Successful reproduce of the script code inject web vulnerability! 


PoC: Albumname - File Dir Index
</script><tr><td height="170" width="150"><p align="center">
<img src="getCoverImage?%7B%22name%22:%22%5C%22%3E%3C[APPLICATION-SIDE SCRIPT CODE EXECUTION!]%3E%3E%22,%22type%22:%222%22,%22groupType%22:2,%22url%22:%22
assets-library://group/?id=7BADE58E-C286-43D8-8CE2-4415C4DF35CA&filter=1537%22,%22numberOfImage%22:%220%22%7D" onclick="albumClick('0')" border="0" 
height="150" width="170"></p></td><td height="170" width="50"></td><td height="170" width="150"><p align="center">
<img src="getCoverImage?%7B%22name%22:%22Camera%20Roll%22,%22type%22:%222%22,%22groupType%22:16,%22url%22:%22assets-library://group/?id=70169F06-36C7-430C-AA4F-55B95E268426%22,
%22numberOfImage%22:%223%22%7D" onclick="albumClick('1')" border="0" height="150" width="170"></p></td><td height="170" width="50"></td><td height="170" width="150">
<p align="center"><img src="getCoverImage?%7B%22name%22:%22My%20Photo%20Stream%22,%22type%22:%222%22,%22groupType%22:32,%22url%22:%22
assets-library://group/?id=F8476D51-E4C9-4A2A-948B-2D577719B9C7&filter=1537%22,%22numberOfImage%22:%220%22%7D" onclick="albumClick('2')" 
border="0" height="150" width="170"></p></td><td height="170" width="50"></td><td height="170" width="150"></td></tr><tr><td height="20"> 
<p align="center"><font size="2" face="Courier New">"><X">>(0)</font></td><td height="20" width="50"></td>
<td height="20" > <p align="center"><font face="Courier New" size="2">Camera Roll(3)</font></td><td height="20" width="50"></td><td height="20" > 
<p align="center"><font face="Courier New" size="2">My Photo Stream(0)</font></td><td height="20" width="50"></td><td height="20" > 
<p align="center"></td></tr><tr><td height="20" colspan="7"></td></tr>
    </table>
</div>


--- PoC Session Logs [GET] (Execution) ---
Status: 200[OK]
GET http://192.168.2.104:8080/getCoverImage?%7B%22name%22:%22%5C%22%3E%3Cimg%20src=%5C%22x%5C%22%3E%2520%3C
%3E%3E%22,%22type%22:%222%22,%22groupType%22:2,%22url%22:%22assets-library://group/?id=7BADE58E-C286-43D8-8CE2-4415C4DF35CA&filter=1537%22,%22numberOfImage%22:%220%22%7D 
   Request Header:
      Host[192.168.2.104:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0]
      Referer[http://192.168.2.104:8080/]
      Connection[keep-alive]
- Response
Status: OK[200] 
GET http://192.168.2.104:8080/x[APPLICATION-SIDE SCRIPT CODE EXECUTION!]
Load Flags[VALIDATE_ALWAYS ] Größe des Inhalts[unknown] Mime Type[unknown]
   Request Header:
      Host[192.168.2.104:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0]
      Accept[image/png,image/*;q=0.8,*/*;q=0.5]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      Referer[http://192.168.2.104:8080/]


Reference(s):
http://localhost:8080/
http://localhost:8080/getCoverImage


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure encode and parse of the vulnerable `albumname` value.
Restrict the albumname value and disallow special chars to prevent application-side injection attacks.
Encode in the file dir index listing the vulnerable output value to prevent the execution of local commands.


Security Risk:
==============
The security risk of the script code inject web vulnerability in the albumname is estimated as medium. (CVSS 5.6)


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


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