Vulnerability identifier: #VU77959

Vulnerability risk: Low

CVSSv3.1: 4.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-33305

CWE-ID: CWE-835

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FortiOS
Operating systems & Components / Operating system
FortiProxy
Hardware solutions / Routers & switches, VoIP, GSM, etc
Fortinet FortiWeb
Server applications / Remote management servers, RDP, SSH

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in firmware upgrade function. A remote privileges user can consume all available system resources and cause denial of service conditions via a specially crafted firmware image.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiOS: 6.4.0 - 6.4.14, 6.0.0 - 6.0.17, 6.2.0 - 6.2.15, 7.0.0 - 7.0.10, 7.2.0 - 7.2.4, 5.6.0 - 5.6.14, 5.4.0 - 5.4.13, 5.2.0 - 5.2.15, 5.0.0 - 5.0.14

FortiProxy: 2.0.0 - 2.0.13, 7.2.0 - 7.2.3, 7.0.0 - 7.0.9, 1.2.0 - 1.2.13, 1.1.0 - 1.1.6, 1.0.0 - 1.0.7

Fortinet FortiWeb: 6.4.0 - 6.4.3, 6.3.0 - 6.3.23, 7.2.0 - 7.2.1, 7.0.0 - 7.0.6

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External links
http://fortiguard.com/psirt/FG-IR-22-375

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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.