CVE-2020-7533 : Security Advisory and Response

A CWE-255: Credentials Management vulnerability exists in Web Server on Modicon M340, Modicon Quantum, and Modicon Premium Legacy offers and their Communication Modules, allowing the execution of unauthorized commands via specially crafted HTTP requests.

Understanding CVE-2020-7533

This CVE involves a credentials management vulnerability in specific Schneider Electric products, potentially leading to unauthorized command execution.

What is CVE-2020-7533?

The CVE-2020-7533 vulnerability pertains to the Web Server on Modicon M340, Modicon Quantum, and Modicon Premium Legacy offers and their Communication Modules. It enables attackers to execute commands on the webserver without authentication by sending malicious HTTP requests.

The Impact of CVE-2020-7533

The vulnerability could result in unauthorized access to the affected systems, potentially leading to the execution of malicious commands without proper authentication.

Technical Details of CVE-2020-7533

This section provides detailed technical information about the CVE-2020-7533 vulnerability.

Vulnerability Description

The vulnerability allows attackers to execute commands on the webserver without authentication through specially crafted HTTP requests.

Affected Systems and Versions

Product: Web Server on Modicon M340, Modicon Quantum, and Modicon Premium Legacy offers and their Communication Modules
Versions: Web Server on Modicon M340, Modicon Quantum, and Modicon Premium Legacy offers and their Communication Modules (refer to the security notification for version details)

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted HTTP requests to the affected web servers, enabling them to execute unauthorized commands.

Mitigation and Prevention

To address CVE-2020-7533, follow these mitigation and prevention measures:

Immediate Steps to Take

Apply security patches provided by Schneider Electric.
Implement network segmentation to restrict access to vulnerable systems.
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 and administrators about secure practices and the importance of timely updates.

Patching and Updates

Ensure that all affected systems are updated with the latest security patches and firmware releases to mitigate the CVE-2020-7533 vulnerability.