#VU97117 Improper certificate validation in Fortinet, Inc products - CVE-2024-31489

Vulnerability identifier: #VU97117

Vulnerability risk: Medium

CVSSv4.0: 5.8 [CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-31489

CWE-ID: CWE-295

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Fortinet FortiClient for Windows
Server applications / Other server solutions
FortiClient (macOS)
Client/Desktop applications / Software for system administration
FortiClient (Linux)
Client/Desktop applications / Software for system administration

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper validation of client-side certificate in ZTA service. A remote attacker can perform Man-in-the-Middle attack on the communication channel between the FortiGate and the FortiClient during the ZTNA tunnel creation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Fortinet FortiClient for Windows: 7.0.0 - 7.0.11, 7.2.0 - 7.2.2

FortiClient (macOS): 7.0.0 - 7.2.4

FortiClient (Linux): 7.0.0 - 7.2.0

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External links
https://www.fortiguard.com/psirt/FG-IR-22-282

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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