#VU77177 Format string error in FortiOS - CVE-2023-29181

Vulnerability identifier: #VU77177

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-29181

CWE-ID: CWE-134

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FortiOS
Operating systems & Components / Operating system

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to a format string error in the Fclicense daemon. A remote user can send specially crafted requests to the daemon that contains format string specifiers and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiOS: 4.1.1 - 4.1.11, 4.2.0 - 4.2.13, 4.3.0 - 4.3.17, 5.0.0 - 5.0.14, 5.2.0 - 5.2.15, 5.4.0 - 5.4.13, 5.6.0 - 5.6.14, 6.0.0 - 6.0.16, 6.2.0 - 6.2.14, 6.4.0 - 6.4.12, 7.0.0 - 7.0.11, 7.2.0 - 7.2.4

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External links
https://fortiguard.fortinet.com/psirt/FG-IR-23-119

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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