Fortinet FortiOS Integer Overflow (FG-IR-21-155)

medium Nessus Plugin ID 162782


The remote host is affected by an integer overflow vulnerability.


An integer overflow vulnerability in the dhcpd daemon of FortiOS allows unauthenticated, adjacent attackers to cause a denial of service (DoS) condition.

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


Update to FortiOS version 6.2.11, 6.49., 7.0.4 or later

See Also

Plugin Details

Severity: Medium

ID: 162782

File Name: fortios_FG-IR-21-155.nasl

Version: 1.6

Type: local

Family: Firewalls

Published: 7/7/2022

Updated: 5/24/2023

Risk Information


Risk Factor: Low

Score: 1.4


Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.4

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

CVSS Score Source: CVE-2021-42755


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

Required KB Items: Host/Fortigate/version

Exploit Ease: No known exploits are available

Patch Publication Date: 7/5/2022

Vulnerability Publication Date: 7/5/2022

Reference Information

CVE: CVE-2021-42755

IAVA: 2022-A-0264-S