Fortinet Fortigate - Out-of-bound-write in sslvpnd (FG-IR-22-475)

high Nessus Plugin ID 175084


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


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-22-475 advisory.

- A out-of-bounds write in Fortinet FortiOS version 7.2.0 through 7.2.3, FortiOS version 7.0.0 through 7.0.10, FortiOS version 6.4.0 through 6.4.11, FortiOS version 6.2.0 through 6.2.13, FortiOS all versions 6.0, FortiProxy version 7.2.0 through 7.2.1, FortiProxy version 7.0.0 through 7.0.7, FortiProxy all versions 2.0, FortiProxy all versions 1.2, FortiProxy all versions 1.1, FortiProxy all versions 1.0 allows an authenticated attacker to execute unauthorized code or commands via specifically crafted requests.

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


Please upgrade to FortiOS version 7.4.0 or above Please upgrade to FortiOS version 7.2.4 or above Please upgrade to FortiOS version 7.0.11 or above Please upgrade to FortiOS version 6.4.12 or above Please upgrade to FortiOS version 6.2.14 or above Please upgrade to FortiProxy version 7.2.2 or above Please upgrade to FortiProxy version 7.0.8 or above Workaround:
Disable Host Check, Restrict to Specific OS Versions and MAC address host checking in sslvpn portal configuration. For example for full-access sslvpn portal:
config vpn ssl web portal edit full-access set os-check disable set host-check none set mac-addr-check disable end

See Also

Plugin Details

Severity: High

ID: 175084

File Name: fortigate_FG-IR-22-475.nasl

Version: 1.6

Type: local

Family: Firewalls

Published: 5/3/2023

Updated: 5/22/2024

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2023-22640


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/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: 5/3/2023

Vulnerability Publication Date: 5/3/2023

Reference Information

CVE: CVE-2023-22640

IAVA: 2023-A-0239-S