Improper validation of certificate with host mismatch in Fortinet FortiClient for Windows

1) Improper validation of certificate with host mismatch

EUVDB-ID: #VU111049

Risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-54019

CWE-ID: CWE-297 - Improper Validation of Certificate with Host Mismatch

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The vulnerability exists due to improper validation of certificate with host mismatch. An unauthorized attacker can redirect VPN connections via DNS spoofing or another form of redirection.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Fortinet FortiClient for Windows: 7.0.0 - 7.4.3

CPE2.3

• cpe:2.3:a:fortinet:fortinet_forticlient:7.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_forticlient:7.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_forticlient:7.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_forticlient:7.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_forticlient:7.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_forticlient:7.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_forticlient:7.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_forticlient:7.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_forticlient:7.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_forticlient:7.0.9:*:*:*:*:*:*:*

External links

https://www.fortiguard.com/psirt/FG-IR-24-365

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.