#VU77182 Format string error in FortiOS and FortiProxy - CVE-2022-43953

Vulnerability identifier: #VU77182

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-43953

CWE-ID: CWE-134

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
FortiOS
Operating systems & Components / Operating system
FortiProxy
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Fortinet, Inc

Description

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

The vulnerability exists due to a format string error in fortiguard-resources CLI command. A local user can pass specially crafted argument to the affected CLI command and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiOS: 6.2.0 - 6.2.15, 6.4.0 - 6.4.12, 7.0.0 - 7.0.11, 7.2.0 - 7.2.4

FortiProxy: 7.0.0 - 7.0.7, 7.2.0 - 7.2.1

---

External links
https://fortiguard.fortinet.com/psirt/FG-IR-22-463

---

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?

No. We are not aware of malware exploiting this vulnerability.