CVE-2021-43204 Denial of service in Fortinet FortiClientWindows
An attacker can cause a complete denial of service of FortiClient Windows components by manipulating directory access permissions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-43204?
CVE-2021-43204 is a medium-severity denial of service vulnerability in Fortinet Forticlient, published on 9 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A improper control of a resource through its lifetime in Fortinet FortiClientWindows version 6.4.1 and 6.4.0, version 6.2.9 and below, version 6.0.10 and below allows attacker to cause a complete denial of service of its components via changes of directory access permissions.
Which versions are affected by CVE-2021-43204?
It affects 1 product.
Products include Fortinet Forticlient.
How do I fix CVE-2021-43204?
No fix has been published for CVE-2021-43204 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-43204 being exploited?
There is no known exploitation of CVE-2021-43204 in the wild and no public exploit code.
Other vulnerabilities in Fortinet Forticlient
- CVE-2019-17658 Privilege escalation in Fortinet FortiClientWindows
- CVE-2023-45590 Code injection in FortiClientLinux
- CVE-2017-14184 Information disclosure in FortiClient SSLVPN Client for Linux
- CVE-2016-8493 Privilege escalation in Fortinet FortiClient
- CVE-2020-15934 Privilege escalation in FortiClientLinux
Sources
Also known as GHSA-fqqh-g3vm-m5g2.