bugtraq - XSS vulnerability in DT Centrepiece

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Message-Id: <201008051355.o75DtJYi089120@htbridge.ch>
Date: Thu, 5 Aug 2010 15:55:19 +0200 (CEST)
From: advisory@...ridge.ch
To: bugtraq@...urityfocus.com
Subject: XSS vulnerability in DT Centrepiece

Vulnerability ID: HTB22520
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_dt_centrepiece_1.html
Product: DT Centrepiece
Vendor: DT Services ( http://www.dt.net.nz/ ) 
Vulnerable Version: 4.5 and Probably Prior Versions
Vendor Notification: 22 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.

The vulnerability exists due to failure in the "login.asp" script to properly sanitize user-supplied input in "c" 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:

http://host/login.asp?c=/%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3E