#VU46991 Cross-site scripting in FortiAnalyzer and FortiTester - CVE-2020-12817

Vulnerability identifier: #VU46991

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-12817

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FortiAnalyzer
Server applications / IDS/IPS systems, Firewalls and proxy servers
FortiTester
Server applications / Other server solutions

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 user-supplied data in IPv4/IPv6 address fields. A remote authenticated 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
Install updates from vendor's website.

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 - 5.6.5, 6.0.0 - 6.0.1, 6.2.0 - 6.2.5, 6.4.0 - 6.4.1

FortiTester: 3.0.0, 3.1.0, 3.2.0, 3.3.0 - 3.3.1, 3.4.0, 3.6.0, 3.7.0 - 3.7.1, 3.8.0

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External links
https://fortiguard.com/psirt/FG-IR-20-054

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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