Cross-site scripting in Fortinet, FortiOS

1) Cross-site scripting

EUVDB-ID: #VU42079

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-7182

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 Cross-site scripting attacks.

An input validation error exists in firewall/schedule/recurrdlg in Fortinet FortiOS 5.0.5 when processing mkey parameter. 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

Install update from vendor's website.

Vulnerable software versions

FortiOS: 5.0.5

External links

http://archives.neohapsis.com/archives/fulldisclosure/2014-02/0016.html
http://osvdb.org/102819
http://secunia.com/advisories/56739
http://www.fortiguard.com/advisory/FG-IR-14-003/
http://www.kb.cert.org/vuls/id/728638
http://www.securityfocus.com/bid/65308
http://www.securitytracker.com/id/1029730

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.