Fortinet FortiOS < 5.6.12 / 6.x < 6.0.8 Information Disclosure MitM (FG-IR-18-100)

medium Nessus Plugin ID 131283
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The remote host is affected by an information disclosure vulnerability.


The remote host is running a version of FortiOS prior to 5.6.12 or 6.x prior to 6.0.8. It is, therefore, affected by an information disclosure man-in-the-middle vulnerability in the FortiGuard services communication protocol due to the use of a hardcoded cryptographic key. A remote attacker with knowledge of the hardcoded key can exploit this via the network to eavesdrop and modify information sent and received from FortiGuard servers.


Upgrade to Fortinet FortiOS version to 5.6.12, 6.0.8 or later.

See Also

Plugin Details

Severity: Medium

ID: 131283

File Name: fortios_FG-IR-18-100.nasl

Version: 1.15

Type: local

Family: Firewalls

Published: 11/25/2019

Updated: 7/6/2021

Dependencies: fortinet_version.nbin, ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2018-9195


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

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

Temporal Vector: E:POC/RL:OF/RC:C


Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.3

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

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

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

Excluded KB Items: Host/windows_local_checks

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/28/2019

Vulnerability Publication Date: 11/21/2019

Reference Information

CVE: CVE-2018-9195