Fortinet products update for Linux kernel

1) Use of uninitialized resource

EUVDB-ID: #VU61110

Risk: Low

CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2022-0847

CWE-ID: CWE-908 - Use of Uninitialized Resource

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to usage of an uninitialized resources. A local user can overwrite arbitrary file in the page cache, even if the file is read-only, and execute arbitrary code on the system with elevated privileges.

The vulnerability was dubbed Dirty Pipe.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FortiProxy: 7.0.0 - 7.0.3

FortiSIEM: 6.1.0 - 6.4.0

FortiAuthenticator: 6.3.0 - 6.4.1

CPE2.3

• cpe:2.3:h:fortinet:fortiproxy:7.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortisiem:6.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortisiem:6.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortisiem:6.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortiauthenticator:6.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortiauthenticator:6.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortiauthenticator:6.3.2:*:*:*:*:*:*:*

External links

https://fortiguard.fortinet.com/psirt/FG-IR-22-050

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.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.