Fortigate UTM WAF Appliance - Multiple Vulnerabilities

Type vulnerlab
Reporter Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (
Modified 2012-08-29T00:00:00


                                            Document Title:
Fortigate UTM WAF Appliance - Multiple Vulnerabilities

References (Source):

Release Date:

Vulnerability Laboratory ID (VL-ID):

Common Vulnerability Scoring System:

Product & Service 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: )

Abstract Advisory Information:
Vulnerability-Lab Research Team discovered multiple persistent Web Vulnerabilities in the FortiGate UTM Appliance Application.

Vulnerability Disclosure 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  )
2012-08-28:	Public or Non-Public Disclosure

Discovery Status:

Affected Product(s):
Product: UTM Appliance Application FortiGate-5000 Series;FortiGate-3950 Series;FortiGate-3810A;

Exploitation Technique:

Severity Level:

Technical Details & Description:
Multiple input validation vulnerabilities(persistent) are detected in the FortiGate UTM Appliance Application. Remote attacker 
& low privileged user accounts can include (persistent) 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.  It is also possible to hijack customer sessions via persistent script code execution on application-side. Successful 
exploitation can also result in content/module request manipulation, execution of persistent malicious script code, session 
hijacking, account steal & 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 (PoC):
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.

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;``>
<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><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>
align=``left``><input name=``ip6`` size=``50`` maxlength=``43`` value=``::/0`` onfocus=````></td>
<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=````><[EXECUTION OF PERSISTENT CODE!]'<``=````><span class=``tag_label``>
``><[EXECUTION OF PERSISTENT CODE!] <</span><span class=``tag_tail``></span><
<tr class=``object_tag_row``>
<td class=``dep_opt``><label for=``addTag``>Add tags</label>
<td><input class=``ac_input`` autocomplete=``off`` name=``addTag`` id=``addTag`` type=``text``><img src=``/images/act_add.gif`` 
</tbody></table><input name=``mkey`` id=``mkey`` value=``all`` type=``hidden``>
<input name=``tagList`` 
id=``tagList`` value=``"><[EXECUTION OF PERSISTENT CODE!]<`` type=``hidden``>
<input name=``is_ipv6`` id=``is_ipv6`` value=``1`` 
<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``>

... or

<td><span class="tag_list" id="appliedTags"><span class="object_tag object_tag_remove" 
mkey=""><[EXECUTION OF PERSISTENT 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 - Fix & Patch:
To fix the persistent vulnerabilities by parsing the object tag add input fields & output listings in all sections. 
Restrict the input field and disallow tag chars or statements requests.

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

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

Credits & Authors:
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (

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