#VU16174 Cross-site scripting in FortiAnalyzer and FortiManager - CVE-2018-13375

Vulnerability identifier: #VU16174

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-13375

CWE-ID: CWE-79

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
FortiAnalyzer
Server applications / IDS/IPS systems, Firewalls and proxy servers
FortiManager
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Fortinet, Inc

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

The vulnerability exists due to insufficient sanitization of DHCP requests containing malicious scripts in the HOSTNAME parameter. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in 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 the affected software to version 5.6.1.

Vulnerable software versions

FortiAnalyzer: 5.0.0 - 5.0.13, 5.2.0 - 5.2.10, 5.4.0 - 5.4.5, 5.6.0, 6.0.0 - 6.0.1

FortiManager: 5.0.0 - 5.0.12, 5.1, 5.2.0 - 5.2.10, 5.4.0 - 5.4.5, 5.6.0, 6.0.0 - 6.0.1

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External links
https://fortiguard.com/psirt/FG-IR-18-121

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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