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Fortinet Fortigate TACACS+ authentication bypass (FG-IR-24-472)

critical Nessus Plugin ID 235826

Synopsis

Fortinet Firewall is missing one or more security-related updates.

Description

The version of Fortigate installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the FG-IR-24-472 advisory.

 - A missing authentication for critical function vulnerability [CWE-306] in FortiOS, FortiProxy, and FortiSwitchManager TACACS+ configured to use a remote TACACS+ server for authentication, that has itself been configured to use ASCII authentication may allow an attacker with knowledge of an existing admin account to access the device as a valid admin via an authentication bypass. (CVE-2025-22252)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

For 7.4.x, upgrade to Fortigate version 7.4.7 or later. For 7.6.x, upgrade to Fortigate version 7.6.1 or later.

See Also

https://www.fortiguard.com/psirt/FG-IR-24-472

Plugin Details

Severity: Critical

ID: 235826

File Name: fortigate_FG-IR-24-472.nasl

Version: 1.1

Type: local

Family: Firewalls

Published: 5/13/2025

Updated: 5/13/2025

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2025-22252

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

Required KB Items: Settings/ParanoidReport, Host/Fortigate/model, Host/Fortigate/version

Exploit Ease: No known exploits are available

Patch Publication Date: 5/13/2025

Vulnerability Publication Date: 5/13/2025

Reference Information

CVE: CVE-2025-22252