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&amp;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&amp;mkey=&lt;INCLUDE NON-PERSISTENT SCRIPTCODE HERE!>
https://appliance.127.0.0.1:137/displaymessage?url=/webfilter/profile/dlg&amp;title=&lt;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 ([email protected])

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The information provided in this advisory is provided as it is without any warranty. Vulnerability-Lab disclaims all warranties,
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