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Fortinet FortiOS SSH Undocumented Interactive Login Vulnerability

critical Nessus Plugin ID 87896

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Synopsis

The SSH server running on the remote host can be logged into using default SSH credentials.

Description

The SSH server running on the remote host can be logged into using default SSH credentials. The 'Fortimanager_Access' account has a password based on the string 'FGTAbc11*xy+Qqz27' and a calculated hash that is publicly known. A remote attacker can exploit this to gain administrative access to the remote host.

Solution

Upgrade to Fortinet FortiOS 4.3.17 / 5.0.8 / 5.2.x / 5.4.x or later.
Alternatively, as a workaround, disable administrative access via SSH on all interfaces.

See Also

http://www.nessus.org/u?0c2dcc56

https://seclists.org/fulldisclosure/2016/Jan/26

Plugin Details

Severity: Critical

ID: 87896

File Name: fortios_ssh_backdoor.nasl

Version: 1.19

Type: remote

Family: Misc.

Published: 1/13/2016

Updated: 7/11/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2016-1909

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

Excluded KB Items: global_settings/supplied_logins_only

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/9/2014

Vulnerability Publication Date: 1/12/2016

Reference Information

CVE: CVE-2016-1909

BID: 80581