CVE-2021-2146 Explained : Impact and Mitigation

A detailed overview of CVE-2021-2146, a vulnerability in Oracle MySQL Server that could potentially compromise the server's security.

Understanding CVE-2021-2146

This section provides insights into the nature and impact of the CVE-2021-2146 vulnerability.

What is CVE-2021-2146?

The vulnerability affects Oracle MySQL Server versions 5.7.33 and prior, as well as 8.0.23 and prior. It allows a high privileged attacker with network access to compromise the server, potentially leading to DOS attacks.

The Impact of CVE-2021-2146

Successful exploitation of the vulnerability can result in the unauthorized ability to cause a hang or frequently repeatable crash, leading to a complete Denial of Service (DOS) on MySQL Server. The CVSS 3.1 Base Score for this vulnerability is 4.9, indicating medium severity with high availability impact.

Technical Details of CVE-2021-2146

This section dives deeper into the technical aspects of the CVE-2021-2146 vulnerability.

Vulnerability Description

The vulnerability in Oracle MySQL Server's 'Server: Options' component allows attackers to compromise the server via multiple protocols, potentially causing DOS attacks.

Affected Systems and Versions

Oracle MySQL Server versions 5.7.33 and earlier, as well as 8.0.23 and prior, are affected by this vulnerability.

Exploitation Mechanism

Attackers with network access and high privileges can exploit this vulnerability to compromise the MySQL Server.

Mitigation and Prevention

Explore the best practices to mitigate the CVE-2021-2146 vulnerability and prevent potential security breaches.

Immediate Steps to Take

Users are advised to apply security patches, monitor network traffic for suspicious activities, and restrict network access to the MySQL Server.

Long-Term Security Practices

Implement network segmentation, regularly update MySQL Server software, and conduct security assessments to enhance system defenses.

Patching and Updates

Stay informed about security alerts, follow Oracle's security advisories, and promptly apply relevant patches to ensure the server's security.