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Fortinet FortiOS Web Interface Cookie Parser RCE (EGREGIOUSBLUNDER)
critical Nessus Plugin ID 93196
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Synopsis
A web-based management console running on the remote host is affected by a remote code execution vulnerability.Description
The Fortinet FortiOS management console running on the remote host is affected by a remote code execution vulnerability, known as EGREGIOUSBLUNDER, in its 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.
Note that this plugin attempts to kill the httpsd process, which appears to restart after termination. Additionally, this plugin requires report paranoia as it relies on a missing server response to indicate a vulnerable status, which may or may not be reliable.
Solution
Upgrade to Fortinet FortiOS 4.1.11 / 4.2.13 / 4.3.9 / 5.0 or later.See Also
Plugin Details
Severity: Critical
ID: 93196
File Name: fortios_cookie_parsing_bof.nasl
Version: 1.7
Type: remote
Family: CGI abuses
Published: 8/29/2016
Updated: 11/15/2018
Configuration: Enable paranoid mode
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 8.3
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 9.1
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:F/RL:O/RC:X
Vulnerability Information
CPE: cpe:/o:fortinet:fortios
Required KB Items: Settings/ParanoidReport, www/fortios_ui
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 8/17/2016
Vulnerability Publication Date: 8/14/2016
Reference Information
CVE: CVE-2016-6909
BID: 92523