Cross-site scripting in Fortinet, FortiOS

1) Cross-site scripting

EUVDB-ID: #VU31354

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2012-0941

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error in Fortinet FortiGate UTM WAF appliances with FortiOS 4.3.x before 4.3.6 when processing vectors involving the (1) Endpoint Monitor, (2) Dialup List, or (3) Log. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Update to version 4.3.6.

Vulnerable software versions

FortiOS: 4.3.0 - 4.3.5

External links

http://packetstormsecurity.org/files/109168/VL-144.txt
http://www.securityfocus.com/bid/51708
http://exchange.xforce.ibmcloud.com/vulnerabilities/72761
http://fortiguard.com/psirt/FG-IR-012-001
http://securitytracker.com/id/1026594
http://www.vulnerability-lab.com/get_content.php?id=144

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.