Denial of service in multiple Fortinet products firmware upgrade function



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-33305
CWE-ID CWE-835
Exploitation vector Network
Public exploit N/A
Vulnerable software
 FortiOS
Operating systems & Components / Operating system

FortiProxy
Hardware solutions / Routers & switches, VoIP, GSM, etc

FortiWeb
Server applications / Remote management servers, RDP, SSH

Vendor Fortinet, Inc

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Infinite loop

EUVDB-ID: #VU77959

Risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-33305

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

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: 5.0.0 - 7.2.4

FortiProxy: 1.0.0 - 7.2.3

FortiWeb: 6.3.0 - 7.2.1

CPE2.3 External links

https://fortiguard.com/psirt/FG-IR-22-375


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.



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