MitM attack in FortiOS and FortiProxy

1) Improper Certificate Validation

EUVDB-ID: #VU77181

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 - Improper Certificate Validation

Exploit availability: No

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 - 7.2.0

FortiProxy: 1.2.0 - 7.2.3

CPE2.3

• cpe:2.3:o:fortinet:fortios:6.0.0:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.0.6:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.0.7:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.0.9:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:1.2.0:*:*:*:*:*:*:*

External links

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

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.