CVE-2020-28211 Auth bypass in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions)

High 7.8 Published 19 Nov 2020 Updated 4 Aug 2024

Attackers can bypass authentication in the EcoStruxure Control Expert PLC Simulator by overwriting memory using a debugger.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-28211?

CVE-2020-28211 is a high-severity authentication bypass vulnerability in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions), published on 19 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A CWE-863: Incorrect Authorization vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause bypass of authentication when overwriting memory using a debugger.

Weakness: CWE-863

Which versions are affected by CVE-2020-28211?

It affects 1 product.

Products include Schneider-Electric Ecostruxure Control Expert.

How do I fix CVE-2020-28211?

No fix has been published for CVE-2020-28211 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2020-28211 being exploited?

There is no known exploitation of CVE-2020-28211 in the wild and no public exploit code.

Sources

Also known as GHSA-2x9m-ghpm-wjh6.