CVE-2018-7847 : Vulnerability Insights and Analysis

The Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium versions are vulnerable to a CWE-284 improper access control issue that can lead to denial of service or potential code execution.

Understanding CVE-2018-7847

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

What is CVE-2018-7847?

CVE-2018-7847 is a CWE-284 vulnerability affecting Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium. It allows attackers to disrupt services or execute unauthorized code by manipulating controller settings via Modbus.

The Impact of CVE-2018-7847

The vulnerability poses a significant risk of denial of service attacks and potential unauthorized code execution on affected systems.

Technical Details of CVE-2018-7847

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability stems from improper access control in the affected Schneider Electric products, enabling attackers to exploit the Modbus protocol to tamper with controller configurations.

Affected Systems and Versions

Products: Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium
Versions: Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the controller's configuration settings through the Modbus protocol, potentially leading to denial of service or unauthorized code execution.

Mitigation and Prevention

Protecting systems from CVE-2018-7847 requires immediate actions and long-term security measures.

Immediate Steps to Take

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

Long-Term Security Practices

Regularly update and patch all industrial control systems (ICS) components.
Conduct security assessments and penetration testing to identify and address vulnerabilities.
Educate personnel on cybersecurity best practices to enhance overall system security.

Patching and Updates

Schneider Electric may release patches and updates to address CVE-2018-7847. Stay informed about security advisories and apply patches as soon as they are available.