CVE-2022-3166 Explained : Impact and Mitigation

This article provides detailed information about CVE-2022-3166, a vulnerability affecting the MicroLogix 1100 and 1400 products from Rockwell Automation.

Understanding CVE-2022-3166

CVE-2022-3166 refers to a vulnerability in the web servers of MicroLogix 1100 and 1400 controllers that could lead to a denial-of-service condition when exploited by an attacker.

What is CVE-2022-3166?

Rockwell Automation identified a security vulnerability in the webservers of MicroLogix 1100 and 1400 controllers that could be triggered by an attacker with network access, causing a denial-of-service condition.

The Impact of CVE-2022-3166

The vulnerability could be exploited by sending TCP packets to the webserver, abruptly closing it, and leading to a denial-of-service condition for the web server application on the affected devices.

Technical Details of CVE-2022-3166

This section covers specific technical details related to CVE-2022-3166.

Vulnerability Description

The vulnerability allows attackers to trigger a denial-of-service condition on the web server application by sending TCP packets to the affected systems.

Affected Systems and Versions

MicroLogix 1100: All versions are affected.
MicroLogix 1400-B/C: Versions 21.007 and below are affected.
MicroLogix 1400-A: Versions 7.000 and below are affected.

Exploitation Mechanism

The vulnerability can be exploited by attackers with network access by sending TCP packets to the webserver and forcibly closing it.

Mitigation and Prevention

To address CVE-2022-3166, consider the following mitigation strategies.

Immediate Steps to Take

Monitor network traffic for any suspicious activity targeting the web servers of MicroLogix 1100 and 1400 controllers.
Implement firewall rules to restrict unauthorized access to the affected systems.

Long-Term Security Practices

Regularly update the firmware of the MicroLogix 1100 and 1400 controllers to patch known vulnerabilities.
Conduct security assessments periodically to identify and address potential risks.

Patching and Updates

Refer to the vendor's official advisory for patches and updates to secure the affected systems.