Cross-site scripting in Fortinet, FortiAuthenticator

1) Cross-site scripting

EUVDB-ID: #VU37093

Risk: Low

CVSSv3.1: 5.3 [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-2018-9186

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

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. The vulnerability allows attacker to execute unauthorized script code via inject malicious scripts in HTTP referer header.

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 5.3.0.

Vulnerable software versions

FortiAuthenticator: 5.0.0 - 5.2.2

External links

http://www.securityfocus.com/bid/104371
http://fortiguard.com/advisory/FG-IR-18-059

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.