Full Disclosure: Fortigate UTM WAF Appliance - Cross Site Vulnerabilities

[Vulnerability Lab <research () vulnerability-lab com>]

Title:
======
Fortigate UTM WAF Appliance - Cross Site Vulnerabilities


Date:
=====
2012-09-07


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=559


VL-ID:
=====
559


Common Vulnerability Scoring System:
====================================
3.5


Introduction:
=============
The FortiGate series of multi-threat security systems detect and eliminate the most damaging, content-based threats 
from email 
and Web traffic such as viruses, worms, intrusions, inappropriate Web content and more in real time - without degrading 
network performance.

Ranging from the FortiGate-30 series for small offices to the FortiGate-5000 series for large enterprises, service 
providers and 
carriers, the FortiGate line combines the FortiOS™ security operating system with FortiASIC processors and other 
hardware to provide 
a comprehensive and high-performance array of security and networking functions including:

    * Firewall, VPN, and Traffic Shaping
    * Intrusion Prevention System (IPS)
    * Antivirus/Antispyware/Antimalware
    * Web Filtering
    * Antispam
    * Application Control (e.g., IM and P2P)
    * VoIP Support (H.323. and SCCP)
    * Layer 2/3 routing
    * Multiple WAN interface options

FortiGate appliances provide cost-effective, comprehensive protection against network, content, and application-level 
threats - including 
complex attacks favored by cybercriminals - without degrading network availability and uptime. FortiGate platforms 
incorporate sophisticated 
networking features, such as high availability (active/active, active/passive) for maximum network uptime, and virtual 
domain (VDOM) 
capabilities to separate various networks requiring different security policies.

Fortigate applainces are Pentagon & US Military certified. 
The military provides high security standards & save outdoor camps, air base, offices with fortigate hardware.

(Copy from the Vendor Homepage: http://www.fortinet.com/products/fortigate )


Abstract:
=========
Vulnerability-Lab Research Team discovered multiple non-persistent Web Vulnerabilities in the FortiGates UTM Appliance 
Application.


Report-Timeline:
================
2012-05-07:     Researcher Notification & Coordination
2012-05-10:     Vendor Notification
2012-06-08:     Vendor Response/Feedback
2012-08-30:     Vendor Fix/Patch ( FortiOS v4.3.8 B0630 & FortiOS v5.0 B064 )
2012-09-07:     Public or Non-Public Disclosure


Status:
========
Published


Affected Products:
==================
Fortigate
Product: UTM Firewall Appliance Application vFortiGate-5000 Series;FortiGate-3950 Series;FortiGate-3810A;


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


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


Details:
========
Multiple input validation vulnerabilities (non-persistent) are detected in the FortiGates UTM Appliance Application. 
The vulnerability allows remote attackers to hijack admin/customer sessions with required user inter action 
(client-side). 
Successful exploitation allows to phish user accounts, hijacking sessions, redirect over client side requests or 
manipulate 
website context on client-side browser requests.


Vulnerable Module(s): (Non-Persistent)
                                                [+] Exception Handling - objusagedlg
                                                [+] WiFi-controller SSID - Topic
                                                [+] Display Message - Title & Message

Picture(s):
                                                ../1.png
                                                ../2.png


Interface - UTM WAF Web Application [Appliance]
FortiGate-5000 Series;FortiGate-3950 Series;FortiGate-3810A;FortiGate-3600A;FortiGate-3016B;FortiGate-1240B
FortiGate-800;FortiGate-620B;FortiGate-311B;FortiGate-310B;FortiGate-300A;FortiGate-224B;FortiGate-200B Series


Proof of Concept:
=================
The non-persistent vulnerability can be exploited by remote attackers with medium or high required user inter action. 
For demonstration or reproduce  ...


Code Review:    Exception Handling - objusagedlg
URL:            http://appliance.127.0.0.1:137/objusagedlg?type=220&mkey=

<div style="text-align: center;"><h2>WiFi-controller SSID "<span class="emphasized_msg">"><[EXECUTES NON-PERSISTENT 
SCRIPTCODE HERE!] <
</span>" is used by:</h2><div>Total References: <span id="total_refcount"></span></div><div class="info_msg"><span 
id="total_unused">
</span> object types that may be configured to use this object have no references (<span 
id="unused_toggle"></span>)</div>
<form name="search_params"><input name="type" value="220" type="hidden"><input name="mkey" value="" type="hidden">
<iframe src="objusagedlg-Dateien/hack.htm" [EXECUTES NON-PERSISTENT SCRIPTCODE HERE!]>' <"=""><input
 type="hidden" name="mkey_display" value="" /></form><div 
id="reftable-container"></div>&


Code Review:    Display Message - Title & Message
URL:            https://appliance.127.0.0.1:137/displaymessage?url=/webfilter/profile/dlg&title=

<td>">[EXECUTES NON-PERSISTENT SCRIPTCODE HERE!]' <<="" td="">
</tr>
</table></td>
</tr>
<tr>
<td class="body" height=100><table class="body"><tr><td align="center">
Notice: This is a hack by BKM<br>
</td></tr></table></td>
</tr>
<tr><td>
<table class="footer" cellpadding="0" cellspacing="0">
<tr><td>
<input class="button" type="button" value="OK" onclick="if (window.opener) { window.close(); } else if 
(parent && parent.wij_in_modal_op && parent.wij_in_modal_op()) { if (0 && 
parent.callback_handlers) parent.callback_handlers.should_call = true; parent.wij_end_modal_dialog(); } 
else { document.location='/webfilter/profile/dlg'; }">
</td></tr>
</table>
</td></tr>
</table>
</body>
</html>
</iframe></td>


PoC:
http://appliance.127.0.0.1:137/objusagedlg?type=220&mkey=<INCLUDE NON-PERSISTENT SCRIPTCODE HERE!>
https://appliance.127.0.0.1:137/displaymessage?url=/webfilter/profile/dlg&title=<INCLUDE NON-PERSISTENT SCRIPTCODE 
HERE!>&msg=Notice:hacking firewall 6am


Reference(s):
                        ../objusagedlg.htm
                        ../displaymessage.htm


Solution:
=========
Restrict the mkey, context, title and msg parameter. Parse the client side input & output listings on requests to fix 
the issue stable. Filter & restrict the input request of the exception-handling. Validate the output listing to 
patch/fix the stable client side cross site scripting vulnerability.

   * FortiOS v4.3.8 B0630
   * FortiOS v5.0 B064


Risk:
=====
The security risk of the non-persistent cross site scripting vulnerabilities are estimated as 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 
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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.

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                                        Copyright © 2012 | Vulnerability Laboratory



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CONTACT: research () vulnerability-lab com


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