CVE-2018-7852 : Vulnerability Insights and Analysis

The Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium are vulnerable to a CWE-248: Uncaught Exception leading to denial of service if an invalid private command parameter is sent via Modbus.

Understanding CVE-2018-7852

This CVE involves multiple vulnerabilities in Schneider Electric's Modicon series.

What is CVE-2018-7852?

This CVE identifies a CWE-248: Uncaught Exception vulnerability in various versions of Schneider Electric's Modicon M580, M340, Quantum, and Premium devices. The flaw could result in a denial of service scenario when an unauthorized private command parameter is transmitted to the controller through Modbus.

The Impact of CVE-2018-7852

The vulnerability could potentially lead to a denial of service situation, disrupting the normal operation of the affected devices and systems.

Technical Details of CVE-2018-7852

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability is classified as CWE-248: Uncaught Exception, which can be exploited by sending an invalid private command parameter to the controller via Modbus, potentially causing a denial of service.

Affected Systems and Versions

Products affected: Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium
Vulnerable versions: Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium

Exploitation Mechanism

The vulnerability can be exploited by sending an unauthorized private command parameter to the controller over Modbus, triggering a denial of service situation.

Mitigation and Prevention

Protecting systems from CVE-2018-7852 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by Schneider Electric promptly.
Implement network segmentation to isolate vulnerable devices.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch all software and firmware on the affected devices.
Conduct security assessments and penetration testing to identify and address vulnerabilities.
Educate personnel on cybersecurity best practices to prevent unauthorized access.
Implement intrusion detection and prevention systems to monitor and block malicious activities.
Stay informed about security advisories and updates from Schneider Electric.

Patching and Updates

Ensure that all affected devices are updated with the latest security patches and firmware releases provided by Schneider Electric to mitigate the CVE-2018-7852 vulnerability.