CVE-2021-30191 Memory corruption in n/a

High 7.5 Published 25 May 2021 Updated 3 Aug 2024

A buffer overflow in the CODESYS V2 Web-Server allows attackers to execute arbitrary code or cause a denial of service.

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-2021-30191?

CVE-2021-30191 is a high-severity memory corruption vulnerability in n/a, published on 25 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

CODESYS V2 Web-Server before 1.1.9.20 has a a Buffer Copy without Checking the Size of the Input.

Weakness: CWE-120

Which versions are affected by CVE-2021-30191?

It affects 28 products.

Products include Codesys V2 Web Server, Wago 750-8202 Firmware, Wago 750-8203 Firmware, Wago 750-8204 Firmware, Wago 750-8206 Firmware, Wago 750-8207 Firmware and 22 more.

How do I fix CVE-2021-30191?

No fix has been published for CVE-2021-30191 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-30191 being exploited?

There is no known exploitation of CVE-2021-30191 in the wild and no public exploit code.

Sources

Also known as GHSA-9hr6-g366-m3pm.