CVE-2018-7811 Explained : Impact and Mitigation

A vulnerability in the embedded web servers of Schneider Electric's Modicon M340, Premium, Quantum PLCs, and BMXNOR0200 devices allows unauthorized remote access to the change password function without authentication.

Understanding CVE-2018-7811

This CVE involves an Unverified Password Change vulnerability affecting Schneider Electric's embedded web servers.

What is CVE-2018-7811?

The vulnerability in the embedded web servers of Modicon M340, Premium, Quantum PLCs, and BMXNOR0200 devices enables unauthorized remote users to access the change password function without proper authentication.

The Impact of CVE-2018-7811

This vulnerability poses a security risk as it allows unauthorized individuals to potentially change passwords without proper authentication, compromising system integrity and confidentiality.

Technical Details of CVE-2018-7811

This section provides detailed technical information about the CVE.

Vulnerability Description

The Unverified Password Change vulnerability in Schneider Electric's embedded web servers allows unauthorized remote users to access the change password function without authentication.

Affected Systems and Versions

Product: Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs, and BMXNOR0200
Vendor: Schneider Electric SE
Affected Version: Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs, and BMXNOR0200

Exploitation Mechanism

Unauthorized remote users can exploit this vulnerability to gain access to the change password function of the web server without proper authentication, potentially compromising system security.

Mitigation and Prevention

Protecting systems from CVE-2018-7811 is crucial to maintaining security.

Immediate Steps to Take

Apply security patches provided by Schneider Electric to address the vulnerability.
Implement network segmentation to restrict unauthorized access to critical systems.
Monitor network traffic for any suspicious activity that may indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update and patch all software and firmware to prevent vulnerabilities.
Conduct security training for employees to raise awareness about potential threats and best practices.
Implement strong password policies and multi-factor authentication to enhance system security.

Patching and Updates

Stay informed about security updates and advisories from Schneider Electric.
Regularly check for firmware updates and apply them promptly to mitigate known vulnerabilities.