CVE-2020-7566: High severity Schneider-electric Modicon M221 Firmware vulnerability

Published Nov 19, 2020

Updated

A CWE-334: Small Space of Random Values vulnerability exists in Modicon M221 (all references, all versions) that could allow the attacker to break the encryption keys when the attacker has captured the traffic between EcoStruxure Machine - Basic software and Modicon M221 controller.

Affected Software

5 affected components

Schneider-electric Modicon M221 Firmware

Schneider-electric Modicon M221

Schneider Electric Modicon M221

All of the following

Schneider-electric Modicon M221 Firmware

Schneider-electric Modicon M221

Event History

Nov 19, 2020

CVE Published

via MITRE·09:10 PM

Data Sourced

via MITRE·09:10 PM

DescriptionWeakness

Data Sourced

via NVD·10:15 PM

DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

ICSA-20-343-04

Frequently Asked Questions

What is CVE-2020-7566?

CVE-2020-7566 is a vulnerability titled 'A CWE-334: Small Space of Random Values vulnerability' that exists in Modicon M221 firmware.

What is the severity of CVE-2020-7566?

The severity of CVE-2020-7566 is high with a CVSS score of 7.3.

How does CVE-2020-7566 affect Schneider-electric Modicon M221?

CVE-2020-7566 affects Schneider-electric Modicon M221 firmware, allowing the attacker to break encryption keys when capturing traffic between EcoStruxure Machine - Basic software and Modicon M221 controller.

Is Schneider-electric Modicon M221 vulnerable to CVE-2020-7566?

No, Schneider-electric Modicon M221 itself is not vulnerable to CVE-2020-7566.

How can I fix CVE-2020-7566?

To fix CVE-2020-7566, it is recommended to apply the necessary patches or updates provided by Schneider-electric.