Fortinet Fortigate Integer overflow in SSLVPN allocator (FG-IR-21-049)

critical Nessus Plugin ID 209742

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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-21-049 advisory.

- An integer overflow or wraparound vulnerability in the memory allocator of SSLVPN in FortiOS before 7.0.1 may allow an unauthenticated attacker to corrupt control data on the heap via specifically crafted requests to SSLVPN, resulting in potentially arbitrary code execution. (CVE-2021-26109)

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

Solution

Please upgrade to FortiOS version 6.0.13/6.2.9/6.2.10/6.4.6/7.0.1 or later.

Plugin Details

Severity: Critical

ID: 209742

File Name: fortigate_FG-IR-21-049.nasl

Version: 1.3

Type: local

Family: Firewalls

Published: 10/26/2024

Updated: 10/29/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2021-26109

CVSS v3

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: 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

Vulnerability Publication Date: 12/7/2021

Reference Information

CVE: CVE-2021-26109

IAVA: 2021-A-0574-S

Detections

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