Privilege escalation in FortiOS

1) Path traversal

EUVDB-ID: #VU73199

Risk: High

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-41328

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a local user to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing certain CLI command. A local user can read and write arbitrary files on the system.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FortiOS: 6.0.0 - 7.2.3

External links

http://fortiguard.com/psirt/FG-IR-22-369
http://www.fortinet.com/blog/psirt-blogs/fg-ir-22-369-psirt-analysis

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.