CVE-2020-6986 Explained : Impact and Mitigation

In all versions of Omron PLC CJ Series, an attacker can send specific data packets, causing a service error on the PLC Ethernet module, resulting in a denial of service.

Understanding CVE-2020-6986

This CVE involves uncontrolled resource consumption in Omron PLC CJ Series.

What is CVE-2020-6986?

In Omron PLC CJ Series, attackers can exploit a vulnerability by sending specific data packets, leading to a denial of service on the PLC Ethernet module.

The Impact of CVE-2020-6986

Attackers can disrupt PLC services by causing a denial of service through resource consumption.

Technical Details of CVE-2020-6986

This section provides technical insights into the vulnerability.

Vulnerability Description

Attackers can induce a service error on the PLC Ethernet module by sending specific data packets.

Affected Systems and Versions

Product: Omron PLC CJ Series
Versions: All versions

Exploitation Mechanism

Attackers send a series of specific data packets within a short period, causing a service error on the PLC Ethernet module.

Mitigation and Prevention

Protecting systems from CVE-2020-6986 is crucial for security.

Immediate Steps to Take

Monitor network traffic for any unusual patterns or high resource consumption.
Implement network segmentation to isolate critical systems.
Apply firewall rules to restrict unauthorized access.

Long-Term Security Practices

Regularly update firmware and security patches for the affected devices.
Conduct security training for personnel to recognize and respond to potential threats.

Patching and Updates

Check for patches and updates from Omron for the PLC CJ Series to address this vulnerability.