Zero-day vulnerability in FortiOS

Authentication bypass using an alternate path or channel
CVE-2024-55591

Vulnerability details

Advisory: SB2025011431 - Authentication bypass in FortiOS and FortiProxy

Vulnerable component: FortiOS

CVE-ID: CVE-2024-55591

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-288 - Authentication Bypass Using an Alternate Path or Channel

Description:

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper authentication within the Node.js websocket module in the web management interface. A remote non-authenticated attacker can bypass authentication and gain super-admin privileges on the system.

Note, the vulnerability is being actively exploited in the wild.

External links:

https://www.fortiguard.com/psirt/FG-IR-24-535


About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.