#VU81957 Path traversal in FortiManager and FortiAnalyzer - CVE-2023-42791

Vulnerability identifier: #VU81957

Vulnerability risk: Medium

CVSSv4.0: 7.4 [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:P/U:Green]

CVE-ID: CVE-2023-42791

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
FortiManager
Server applications / IDS/IPS systems, Firewalls and proxy servers
FortiAnalyzer
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote user can send a specially crafted HTTP request and read arbitrary files on the system, leading to arbitrary code execution.

Mitigation
Install update from vendor's website.

Vulnerable software versions

FortiManager: 6.2.0 - 6.2.11, 6.4.0 - 6.4.12, 7.0.0 - 7.0.8, 7.2.0 - 7.2.3, 7.4.0

FortiAnalyzer: 6.2.0 - 6.2.11, 6.4.0 - 6.4.12, 7.0.0 - 7.0.8, 7.2.0 - 7.2.3, 7.4.0

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External links
https://fortiguard.fortinet.com/psirt/FG-IR-23-189

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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. However, proof of concept for this vulnerability is available.