What is CVE-2021-36187?

CVE-2021-36187 is a vulnerability in Fortinet FortiWeb version 6.4.0, version 6.3.15 and below, 6.2.5 and below that allows an attacker to cause a denial of service for the webserver daemon through crafted HTTP requests.

What is the severity of CVE-2021-36187?

The severity of CVE-2021-36187 is high with a CVSS score of 7.5.

Which versions of Fortinet FortiWeb are affected by CVE-2021-36187?

Fortinet FortiWeb version 6.4.0, version 6.3.15 and below, 6.2.5 and below are affected by CVE-2021-36187.

How can an attacker exploit CVE-2021-36187?

An attacker can exploit CVE-2021-36187 by sending crafted HTTP requests that cause uncontrolled resource consumption, leading to a denial of service for the webserver daemon.

Is there a fix available for CVE-2021-36187?

It is recommended to update Fortinet FortiWeb to a version that is not affected by CVE-2021-36187. Check the advisory from FortiGuard for more information: https://fortiguard.com/advisory/FG-IR-21-039

Vulnerability/
CVE-2021-36187

high

7.5

CWE

400

2/11/2021

4/8/2024

CVE-2021-36187

First published: Tue Nov 02 2021(Updated: )

A uncontrolled resource consumption in Fortinet FortiWeb version 6.4.0, version 6.3.15 and below, 6.2.5 and below allows attacker to cause a denial of service for webserver daemon via crafted HTTP requests

Credit: psirt@fortinet.com

Affected Software	Affected Version	How to fix
Fortinet FortiWeb	>=6.2.0<=6.2.5
Fortinet FortiWeb	>=6.3.0<=6.3.15
Fortinet FortiWeb	=6.4.0

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Reference Links

https://fortiguard.com/advisory/FG-IR-21-039

Frequently Asked Questions

What is CVE-2021-36187?
CVE-2021-36187 is a vulnerability in Fortinet FortiWeb version 6.4.0, version 6.3.15 and below, 6.2.5 and below that allows an attacker to cause a denial of service for the webserver daemon through crafted HTTP requests.
What is the severity of CVE-2021-36187?
The severity of CVE-2021-36187 is high with a CVSS score of 7.5.
Which versions of Fortinet FortiWeb are affected by CVE-2021-36187?
Fortinet FortiWeb version 6.4.0, version 6.3.15 and below, 6.2.5 and below are affected by CVE-2021-36187.
How can an attacker exploit CVE-2021-36187?
An attacker can exploit CVE-2021-36187 by sending crafted HTTP requests that cause uncontrolled resource consumption, leading to a denial of service for the webserver daemon.
Is there a fix available for CVE-2021-36187?
It is recommended to update Fortinet FortiWeb to a version that is not affected by CVE-2021-36187. Check the advisory from FortiGuard for more information: https://fortiguard.com/advisory/FG-IR-21-039

collector/nvd-index
agent/weakness
agent/references
agent/severity
agent/author
agent/type
agent/event
agent/description
agent/last-modified-date
agent/softwarecombine
agent/first-publish-date
agent/tags
collector/mitre-cve
source/MITRE
vendor/fortinet
canonical/fortinet fortiweb
version/fortinet fortiweb/6.2.0
version/fortinet fortiweb/6.2.5
version/fortinet fortiweb/6.3.0
version/fortinet fortiweb/6.3.15
version/fortinet fortiweb/6.4.0

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