CVE-2020-28211 Explained : Impact and Mitigation

A CWE-863 vulnerability in PLC Simulator on EcoStruxure® Control Expert (now Unity Pro) allows for authentication bypass when overwriting memory using a debugger.

Understanding CVE-2020-28211

This CVE involves an Incorrect Authorization vulnerability in a specific software version.

What is CVE-2020-28211?

The CVE-2020-28211 vulnerability pertains to PLC Simulator on EcoStruxure® Control Expert (now Unity Pro) and the potential for bypassing authentication by overwriting memory with a debugger.

The Impact of CVE-2020-28211

The vulnerability could lead to unauthorized access and compromise of the affected system, posing a significant security risk.

Technical Details of CVE-2020-28211

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability allows attackers to bypass authentication by overwriting memory using a debugger in PLC Simulator on EcoStruxure® Control Expert (now Unity Pro).

Affected Systems and Versions

Product: PLC Simulator on EcoStruxure® Control Expert (now Unity Pro) (all versions)

Exploitation Mechanism

The vulnerability can be exploited by manipulating memory with a debugger to bypass authentication mechanisms.

Mitigation and Prevention

Protecting systems from CVE-2020-28211 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the vendor
Monitor system logs for any suspicious activities
Restrict network access to vulnerable systems

Long-Term Security Practices

Conduct regular security assessments and audits
Implement strong authentication mechanisms
Educate users on secure coding practices

Patching and Updates

Stay informed about security updates from the vendor
Apply patches promptly to mitigate the vulnerability