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Category:   Device (Firewall)  >   Fortinet FortiGate/FortiOS Vendors:   Fortinet
Fortinet FortiGate/FortiOS Input Validation Flaw in DHCP Monitor WebUI Lets Remote Conduct Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1033144
SecurityTracker URL:  http://securitytracker.com/id/1033144
CVE Reference:   CVE-2015-3626   (Links to External Site)
Date:  Jul 30 2015
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5.2.3 and prior
Description:   A vulnerability was reported in Fortinet FortiGate/FortiOS. A remote user can conduct cross-site scripting attacks.

The DHCP monitor web user interface does not properly filter HTML code from user-supplied input before displaying the input. A remote user (DHCP client) can supply a specially crafted hostname via that, when viewed via the DHCP monitor web user interface, can cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the Fortinet FortiGate/FortiOS interface and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Ziv Kamir reported this vulnerability.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the Fortinet FortiGate/FortiOS interface, access data recently submitted by the target user via web form to the interface, or take actions on the interface acting as the target user.
Solution:   The vendor has issued a fix (5.2.4).

The vendor's advisory is available at:

http://www.fortiguard.com/advisory/FG-IR-15-018/

Vendor URL:  www.fortiguard.com/advisory/FG-IR-15-018/ (Links to External Site)
Cause:   Input validation error

Message History:   None.


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