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Fortinet Fortigate Null pointer dereference leading to sslvpn DOS (FG-IR-23-293)

medium Nessus Plugin ID 214074

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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 multiple vulnerabilities as referenced in the FG-IR-23-293 advisory.

 - A null pointer dereference in FortiOS versions 7.4.0 through 7.4.1, 7.2.0 through 7.2.5, 7.0 all versions, 6.4 all versions , 6.2 all versions and 6.0 all versions allows attacker to trigger a denial of service via a crafted http request. (CVE-2023-42785, CVE-2023-42786)

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

Solution

For 6.0.x / 6.2.x / 6.4.x / 7.0.x, see vendor advisory. For 7.2.x, upgrade to Fortigate version 7.2.6 or later. For 7.4.x, upgrade to Fortigate version 7.4.2 or later.

See Also

https://www.fortiguard.com/psirt/FG-IR-23-293

Plugin Details

Severity: Medium

ID: 214074

File Name: fortigate_FG-IR-23-293.nasl

Version: 1.3

Type: local

Family: Firewalls

Published: 1/14/2025

Updated: 2/14/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-42786

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: 1/14/2025

Vulnerability Publication Date: 1/14/2025

Reference Information

CVE: CVE-2023-42785, CVE-2023-42786

IAVA: 2025-A-0022