Missing integrity check in FortiGate FortiOS



Published: 2022-02-21 | Updated: 2023-10-22
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-44168
CWE-ID CWE-494
Exploitation vector Local network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerable software
Subscribe 		FortiOS
Operating systems & Components / Operating system

Vendor Fortinet, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Download of code without integrity check

EUVDB-ID: #VU60735

Risk: Medium

CVSSv3.1: 8.4 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-44168

CWE-ID: CWE-494 - Download of Code Without Integrity Check

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to software does not perform software integrity check when downloading updates in the "execute restore src-vis" command. A remote attacker with ability to perform man-in-the-middle (MitM) attack can supply a malicious software image and gain full control over the affected system after a successful software update.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FortiOS: 6.0.0 - 7.0.2

External links

http://fortiguard.com/psirt/FG-IR-21-201


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.



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