Vulnerability identifier: #VU84439

Vulnerability risk: Medium

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

CVE-ID: CVE-2023-36639

CWE-ID: CWE-134

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FortiProxy
Hardware solutions / Routers & switches, VoIP, GSM, etc
FortiPAM
Server applications / Directory software, identity management
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 HTTPSd. A remote privileged user can send a specially crafted request 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

FortiProxy: 7.2.0 - 7.2.4, 7.0.0 - 7.0.10

FortiPAM: 1.0.0 - 1.1.0

FortiOS: 7.4.0, 7.2.0 - 7.2.4, 7.0.0 - 7.0.11, 6.4.0 - 6.4.12, 6.2.0 - 6.2.15, 6.0.0 - 6.0.17

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External links
http://fortiguard.com/psirt/FG-IR-23-138

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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