Fortinet FortiOS 4.1.x < 4.1.11 / 4.2.x < 4.2.13 / 4.3.x < 4.3.9 Web Interface Cookie Parser RCE (EGREGIOUSBLUNDER)

Critical Nessus Plugin ID 93128


The remote host is affected by a remote code execution vulnerability.


The remote FortiGate device is running a version of FortiOS that is 4.1.x prior to 4.1.11, 4.2.x prior to 4.2.13, or 4.3.x prior to 4.3.9. It is, therefore, affected by a remote code execution vulnerability, known as EGREGIOUSBLUNDER, in the web interface due to improper validation when parsing cookies. An unauthenticated, remote attacker can exploit this, via a specially crafted HTTP request, to cause a buffer overflow condition, resulting in a denial of service condition or the execution of arbitrary code.

EGREGIOUSBLUNDER is one of multiple Equation Group vulnerabilities and exploits disclosed on 2016/08/14 by a group known as the Shadow Brokers.


Upgrade to Fortinet FortiOS 4.1.11 / 4.2.13 / 4.3.9 / 5.0 or later.

See Also

Plugin Details

Severity: Critical

ID: 93128

File Name: fortios_FG-IR-16-023.nasl

Version: 1.7

Type: local

Family: Firewalls

Published: 2016/08/26

Updated: 2018/11/15

Dependencies: 73522

Risk Information

Risk Factor: Critical

CVSS v2.0

Base Score: 10

Temporal Score: 7.8

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

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

CVSS v3.0

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

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2016/08/17

Vulnerability Publication Date: 2016/08/14

Reference Information

CVE: CVE-2016-6909

BID: 92523

EDB-ID: 40276