#VU77181 Improper Certificate Validation in FortiOS and FortiProxy - CVE-2023-29175

Vulnerability identifier: #VU77181

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-29175

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FortiOS
Operating systems & Components / Operating system
FortiProxy
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper certificate validation when connecting to a remote FortiGuard's map server. A remote attacker can perform MitM attack and access or alter sensitive data.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiOS: 6.0.0 - 6.0.16, 6.2.0 - 6.2.14, 6.4.0 - 6.4.12, 7.0.0 - 7.0.11, 7.2.0

FortiProxy: 1.2.0 - 1.2.13, 2.0.0 - 2.0.12, 7.0.0 - 7.0.9, 7.2.0 - 7.2.3

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External links
https://fortiguard.fortinet.com/psirt/FG-IR-22-468

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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.