CVE-2021-22800 Denial of service in Modicon M218 Logic Controller (V5.1.0.6 and prior)
A crafted packet sent to the Modicon M218 Logic Controller can cause a Denial of Service, impacting industrial control system availability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-22800?
CVE-2021-22800 is a high-severity denial of service vulnerability in Modicon M218 Logic Controller (V5.1.0.6 and prior), published on 11 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A CWE-20: Improper Input Validation vulnerability exists that could cause a Denial of Service when a crafted packet is sent to the controller over network port 1105/TCP. Affected Product: Modicon M218 Logic Controller (V5.1.0.6 and prior)
Weakness: CWE-20
Which versions are affected by CVE-2021-22800?
It affects 1 product.
Products include Schneider-Electric Modicon M218 Firmware.
How do I fix CVE-2021-22800?
No fix has been published for CVE-2021-22800 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-2021-22800 being exploited?
There is no known exploitation of CVE-2021-22800 in the wild and no public exploit code.
Other vulnerabilities in Modicon M218 Logic Controller (V5.1.0.6 and prior)
Sources
Also known as GHSA-v2xg-g3g4-3w34.