CVE-2021-43556 FATEK Automation WinProladder

High 7.8 Published 28 Dec 2021 Updated 16 Sep 2024

A stack-based buffer overflow in FATEK WinProladder allows attackers to execute arbitrary code via malicious project files.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-43556?

CVE-2021-43556 is a high-severity memory corruption vulnerability in FATEK Automation WinProladder, published on 28 Dec 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

FATEK WinProladder Versions 3.30_24518 and prior are vulnerable to a stack-based buffer overflow while processing project files, which may allow an attacker to execute arbitrary code.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2021-43556?

It affects 1 product.

Products include Fatek Winproladder.

How do I fix CVE-2021-43556?

No fix has been published for CVE-2021-43556 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-2021-43556 being exploited?

There is no known exploitation of CVE-2021-43556 in the wild and no public exploit code.

Sources

Also known as GHSA-2rvj-jqm9-chgx.