Vulnerability identifier: #VU86280

Vulnerability risk: Medium

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-47537

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FortiOS
Operating systems & Components / Operating system

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper certificate validation in Fortilink. A remote attacker in a Man-in-the-Middle position can decipher and alter the FortiLink communication channel between the FortiOS device and a FortiSwitch instance.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiOS: 7.4.0 - 7.4.1, 7.2.0 - 7.2.6, 7.0.0 - 7.0.13

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External links
http://www.fortiguard.com/psirt/FG-IR-23-301

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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.