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

Low Nessus Plugin ID 95439


The remote host is affected by a security bypass vulnerability.


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.


Upgrade to Fortinet FortiOS version 5.4.2 or later.

See Also

Plugin Details

Severity: Low

ID: 95439

File Name: fortios_CVE-2016-7541.nasl

Version: 1.6

Type: local

Family: Firewalls

Published: 2016/12/01

Modified: 2018/07/11

Dependencies: 73522

Risk Information

Risk Factor: Low


Base Score: 2.6

Temporal Score: 1.9

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C


Base Score: 3.7

Temporal Score: 3.2

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

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, Settings/ParanoidReport

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/11/22

Vulnerability Publication Date: 2016/11/22

Reference Information

CVE: CVE-2016-7541

BID: 94477