CVE-2020-7540 : What You Need to Know

A CWE-306 vulnerability in the Web Server on Modicon M340, Modicon Quantum, and Modicon Premium could lead to unauthenticated command execution.

Understanding CVE-2020-7540

This CVE involves a Missing Authentication for Critical Function vulnerability in specific Schneider Electric products.

What is CVE-2020-7540?

The vulnerability allows unauthenticated users to execute commands on the controller by sending special HTTP requests.

The Impact of CVE-2020-7540

The vulnerability could result in unauthorized command execution, potentially compromising the affected systems' integrity and security.

Technical Details of CVE-2020-7540

This section provides more technical insights into the CVE.

Vulnerability Description

A CWE-306 vulnerability in the Web Server on Modicon M340, Modicon Quantum, and Modicon Premium allows unauthenticated command execution.

Affected Systems and Versions

Web Server on Modicon M340
Legacy Offers Modicon Quantum and Modicon Premium
Associated Communication Modules (refer to security notification for affected versions)

Exploitation Mechanism

The vulnerability can be exploited by sending specific HTTP requests to the controller, enabling unauthorized command execution.

Mitigation and Prevention

Protecting systems from CVE-2020-7540 is crucial to maintaining security.

Immediate Steps to Take

Apply security patches provided by Schneider Electric promptly.
Implement network segmentation to restrict access to vulnerable components.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Conduct security assessments and penetration testing to identify vulnerabilities.
Educate users on best practices for secure system usage.

Patching and Updates

Ensure that all affected systems are updated with the latest patches and security fixes to mitigate the CVE-2020-7540 vulnerability.