CVE-2021-20611 Explained : Impact and Mitigation

A vulnerability in a wide range of Mitsubishi Electric products can allow a remote unauthenticated attacker to launch a Denial of Service (DoS) attack by sending specially crafted packets.

Understanding CVE-2021-20611

This CVE covers an Improper Input Validation vulnerability affecting various Mitsubishi Electric products.

What is CVE-2021-20611?

It is an Improper Input Validation vulnerability in multiple Mitsubishi Electric product series that can be exploited by a remote attacker to cause a denial-of-service (DoS) condition.

The Impact of CVE-2021-20611

The primary impact of this vulnerability is a Denial of Service (DoS) attack, impacting the availability of the affected systems.

Technical Details of CVE-2021-20611

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises due to improper input validation in a wide range of Mitsubishi Electric products. An attacker can exploit this flaw remotely without authentication and cause a DoS condition by sending crafted packets.

Affected Systems and Versions

Numerous products across different Mitsubishi Electric series are affected, primarily those running firmware or operating system software versions prior to specific numbers.

Exploitation Mechanism

Remote unauthenticated attackers can exploit this vulnerability by sending specially crafted packets to the affected systems, triggering a DoS condition that necessitates a system reset for recovery.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-20611, follow the below recommendations:

Immediate Steps to Take

Organizations should update the firmware or software of affected Mitsubishi Electric products to versions that contain fixes for this vulnerability.

Long-Term Security Practices

Implement network segmentation to minimize the impact of potential attacks on critical systems.
Regularly monitor network traffic for any anomalous patterns or potential exploit attempts.

Patching and Updates

Stay informed about security advisories from Mitsubishi Electric and promptly apply recommended patches and updates to mitigate known vulnerabilities.