CVE-2021-22800 : What You Need to Know
Learn about CVE-2021-22800, a CWE-20 vulnerability in Modicon M218 Logic Controller (V5.1.0.6 and prior) that can lead to a Denial of Service condition. Understand the impact, affected versions, and mitigation steps.
This CVE-2021-22800 article provides details about a CWE-20 vulnerability in Modicon M218 Logic Controller (V5.1.0.6 and prior) that could lead to a Denial of Service when a specially crafted packet is sent over network port 1105/TCP.
Understanding CVE-2021-22800
This section delves into the specifics of CVE-2021-22800.
What is CVE-2021-22800?
The CVE-2021-22800 vulnerability is related to an Improper Input Validation flaw in Modicon M218 Logic Controller's firmware versions prior to V5.1.0.6. A remote attacker could exploit this vulnerability by sending a malicious packet to the controller's network port 1105/TCP, resulting in a Denial of Service.
The Impact of CVE-2021-22800
The impact of this vulnerability can lead to a potential Denial of Service of the affected logic controller, disrupting its normal operations and potentially causing downtime for industrial processes.
Technical Details of CVE-2021-22800
This section covers technical aspects of the CVE-2021-22800 vulnerability.
Vulnerability Description
The vulnerability arises from improper input validation, allowing malicious actors to trigger a Denial of Service condition by sending a specially crafted packet to the target system.
Affected Systems and Versions
Modicon M218 Logic Controller versions prior to V5.1.0.6 are affected by this vulnerability, putting these systems at risk of exploitation.
Exploitation Mechanism
Exploiting this vulnerability involves sending a malicious packet to the controller over network port 1105/TCP, triggering the Denial of Service condition.
Mitigation and Prevention
In this section, you will find steps to mitigate and prevent CVE-2021-22800.
Immediate Steps to Take
Users are advised to update the Modicon M218 Logic Controller firmware to version V5.1.0.6 or above to mitigate the vulnerability and prevent potential attacks.
Long-Term Security Practices
Implementing network segmentation, restricting access to sensitive ports, and monitoring network traffic can enhance the overall security posture and reduce the risk of similar vulnerabilities.
Patching and Updates
Regularly applying security patches released by the vendor is essential to address known vulnerabilities and ensure the security of industrial control systems.