Fortinet FortiOS 5.x < 5.4.2 Flow-mode Detection Bypass

high Nessus Plugin ID 95439

Language:

Synopsis

The remote host is affected by a security bypass vulnerability.

Description

The remote FortiGate device is running a version of FortiOS that is 5.x prior to 5.4.2. It is, therefore, affected by a security bypass vulnerability when reloading the scanning engine after an update that results in active network sessions no longer being monitored by flow-mode detection. An unauthenticated, remote attacker can exploit this vulnerability to bypass security protection.

Solution

Upgrade to Fortinet FortiOS version 5.4.2 or later.

Plugin Details

Severity: High

ID: 95439

File Name: fortios_CVE-2016-7541.nasl

Version: 1.8

Type: local

Family: Firewalls

Published: 12/1/2016

Updated: 2/18/2025

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2016-7541

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS Score Source: manual

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/22/2016

Vulnerability Publication Date: 11/22/2016

Reference Information

CVE: CVE-2016-7541

BID: 94477

Detections

Analytics