Fortinet FortiOS < 5.6.13 / 6.0 < 6.0.11 / 6.1 < 6.2.5 / 6.3 < 6.4.2 Heap Buffer overflow (FG-IR-20-082)

critical Nessus Plugin ID 141567
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The remote host is affected by a buffer overflow vulnerability.


The remote host is running a version of FortiOS prior to 5.6.13, 6.0 prior to 6.0.11, 6.1 prior to 6.2.5, or 6.3 prior to 6.4.2.

It is, therefore, affected by a buffer overflow in the Link Control Protocol that could allow an authenticated remote attacker to crash the SSL VPN daemon and could be used to execute remote code.


Upgrade to Fortinet FortiOS version to 5.6.13, 6.0.11, 6.2.5, 6.4.2 or later.

See Also

Plugin Details

Severity: Critical

ID: 141567

File Name: fortios_FG-IR-20-082.nasl

Version: 1.14

Type: local

Family: Firewalls

Published: 10/20/2020

Updated: 8/12/2021

Dependencies: fortinet_version.nbin, ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-12819


Risk Factor: High

Score: 7.4


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C


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: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/24/2020

Vulnerability Publication Date: 9/24/2020

Reference Information

CVE: CVE-2020-12819

IAVA: 2020-A-0440-S