bugtraq - HTB22907: Directory Traversal in Collabtive

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Date: Thu, 31 Mar 2011 14:21:34 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: HTB22907: Directory Traversal in Collabtive

Vulnerability ID: HTB22907
Reference: http://www.htbridge.ch/advisory/directory_traversal_in_collabtive.html
Product: Collabtive
Vendor: Open Dynamics ( http://collabtive.o-dyn.de/ ) 
Vulnerable Version: 0.6.5 and probably prior versions
Vendor Notification: 17 March 2011 
Vulnerability Type: Directory Traversal Vulnerability
Risk level: Medium 
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/) 

Vulnerability Details:
An attacker can disclose arbitrary image file content.

The vulnerability exists due to failure in the "thumb.php" script to properly sanitize user-supplied input in "pic" variable.

Attacker can use browser to exploit this vulnerability. The following PoC is available:
http://host/thumb.php?pic=./../../../../../tmp/photo.jpg