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Fortinet Fortigate SSH authentication bypass when RADIUS authentication is used (FG-IR-22-255)

critical Nessus Plugin ID 179479

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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-22-255 advisory.

 - An authentication bypass by assumed-immutable data vulnerability [CWE-302] in the FortiOS SSH login component 7.2.0, 7.0.0 through 7.0.7, 6.4.0 through 6.4.9, 6.2 all versions, 6.0 all versions and FortiProxy SSH login component 7.0.0 through 7.0.5, 2.0.0 through 2.0.10, 1.2.0 all versions may allow a remote and unauthenticated attacker to login into the device via sending specially crafted Access- Challenge response from the Radius server. (CVE-2022-35843)

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

Solution

Please upgrade to FortiOS version 6.2.13/6.4.10/7.0.8/7.2.2 or later.

See Also

https://www.fortiguard.com/psirt/FG-IR-22-255

Plugin Details

Severity: Critical

ID: 179479

File Name: fortigate_FG-IR-22-255.nasl

Version: 1.3

Type: local

Family: Firewalls

Published: 8/8/2023

Updated: 10/29/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

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-2022-35843

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: Host/Fortigate/model, Host/Fortigate/version

Exploit Ease: No known exploits are available

Patch Publication Date: 12/6/2022

Vulnerability Publication Date: 11/3/2022

Reference Information

CVE: CVE-2022-35843

IAVA: 2022-A-0458-S