Fortinet FortiOS (Mac OS X) <= 5.4, 5.6.x < 5.6.8, 6.0.x < 6.0.5 SSL VPN Buffer Overflow (FG-IR-18-387)

Medium Nessus Plugin ID 125892


The remote Mac OS X host is affected by a buffer overflow condition.


The remote Mac OS X host is running a version of FortiOS prior or equal to 5.4, 5.6.x prior to 5.6.8 or 6.0.x prior to 6.0.5. It is, therefore, affected by a buffer overflow condition in the SSL-VPN web portal, due to a failure to properly parse message payloads. An unauthenticated attacker can exploit this, via a specially crafted request to cause a denial of service condition.


Upgrade to Fortinet FortiOS version to 5.6.8, 6.0.5, 6.2.0 or later. Alternatively, apply one of the workarounds outlined in the linked advisory

See Also

Plugin Details

Severity: Medium

ID: 125892

File Name: macosx_fortios_FG-IR-18-387.nasl

Version: 1.6

Type: local

Agent: macosx

Published: 2019/06/14

Updated: 2019/11/21

Dependencies: 95259

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2018-13381

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

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

CVSS v3.0

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:N/A:H

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

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

Required KB Items: installed_sw/FortiClient (macOS), Host/MacOSX/Version, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 2019/05/17

Vulnerability Publication Date: 2019/05/17

Reference Information

CVE: CVE-2018-13381

BID: 104890