CVE-2019-6820 : What You Need to Know

A vulnerability known as CWE-306: Missing Authentication for Critical Function affects Modicon and PacDrive Controllers, potentially allowing alteration of device IP configurations.

Understanding CVE-2019-6820

This CVE involves a critical vulnerability that could lead to unauthorized changes in device IP configurations.

What is CVE-2019-6820?

The vulnerability, identified as CWE-306, enables attackers to modify IP settings (IP address, network mask, gateway IP) by sending a specific Ethernet frame to affected devices.

The Impact of CVE-2019-6820

The vulnerability affects all versions of Modicon M100, Modicon M200, Modicon M221, ATV IMC drive controller, Modicon M241, Modicon M251, Modicon M258, Modicon LMC058, Modicon LMC078, PacDrive Eco, and PacDrive Pro, including PacDrive Pro2.

Technical Details of CVE-2019-6820

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows unauthorized modification of IP configurations on affected devices.

Affected Systems and Versions

All versions of Modicon and PacDrive Controllers are susceptible to this vulnerability.

Exploitation Mechanism

Attackers can exploit the vulnerability by sending a specific Ethernet frame to the devices, triggering unauthorized IP configuration changes.

Mitigation and Prevention

Protecting systems from CVE-2019-6820 requires immediate actions and long-term security measures.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch all devices and systems to prevent vulnerabilities.
Conduct security training for employees to enhance awareness of potential threats.
Implement strong access control measures to restrict unauthorized changes.

Patching and Updates

Regularly check for security updates and patches from the vendor to address and mitigate the vulnerability effectively.