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Fortinet Fortigate lack of certificate validation (FG-IR-23-301)

medium Nessus Plugin ID 190221

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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-23-301 advisory.

 - An improper certificate validation vulnerability in Fortinet FortiOS 7.0.0 - 7.0.13, 7.2.0 - 7.2.6, 7.4.0
 - 7.4.1 and 6.4 all versions allows a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the FortiLink communication channel between the FortiOS device and FortiSwitch. (CVE-2023-47537)

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

Solution

For 6.4.x, see vendor advisory. For 7.0.x, upgrade to Fortigate version 7.0.16 or later. For 7.2.x, upgrade to Fortigate version 7.2.7 or later. For 7.4.x, upgrade to Fortigate version 7.4.2 or later.

See Also

https://www.fortiguard.com/psirt/FG-IR-23-301

Plugin Details

Severity: Medium

ID: 190221

File Name: fortigate_FG-IR-23-301.nasl

Version: 1.7

Type: local

Family: Firewalls

Published: 2/8/2024

Updated: 2/15/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.5

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2023-47537

CVSS v3

Risk Factor: Medium

Base Score: 4.8

Temporal Score: 4.2

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

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: 2/8/2024

Vulnerability Publication Date: 2/8/2024

Reference Information

CVE: CVE-2023-47537

IAVA: 2024-A-0079-S