CVE-2021-2367 : Vulnerability Insights and Analysis

This article provides an in-depth analysis of CVE-2021-2367, a vulnerability in the MySQL Server product of Oracle MySQL. It discusses the impact, technical details, and mitigation strategies related to this CVE.

Understanding CVE-2021-2367

CVE-2021-2367 is a vulnerability found in the MySQL Server product of Oracle MySQL, specifically in the Optimizer component. It affects versions 8.0.25 and prior, posing a threat to the security of the server.

What is CVE-2021-2367?

The vulnerability allows a high-privileged attacker with network access to compromise MySQL Server. Exploitation can lead to unauthorized actions causing the server to hang or crash, resulting in denial of service (DOS).

The Impact of CVE-2021-2367

The exploitation of this vulnerability can have a significant impact, with attackers gaining the ability to disrupt the availability of MySQL Server. The CVSS 3.1 Base Score for this vulnerability is 4.9, indicating a medium severity level with high availability impacts.

Technical Details of CVE-2021-2367

This section delves deeper into the technical aspects of CVE-2021-2367, including vulnerability description, affected systems and versions, and exploitation mechanisms.

Vulnerability Description

The vulnerability in the Optimizer component of MySQL Server enables attackers to compromise the server via various protocols, leading to potential server crashes and denial of service.

Affected Systems and Versions

Versions 8.0.25 and prior of the MySQL Server product from Oracle Corporation are affected by this vulnerability, making them susceptible to exploitation.

Exploitation Mechanism

Attackers with high privileges and network access can exploit this vulnerability to compromise the MySQL Server, causing it to hang or crash, ultimately resulting in a denial of service.

Mitigation and Prevention

In response to CVE-2021-2367, users are advised to take immediate steps to secure their systems and implement long-term security practices to prevent future vulnerabilities.

Immediate Steps to Take

Users should apply relevant patches and updates provided by Oracle Corporation to address the vulnerability and prevent potential exploitation.

Long-Term Security Practices

Implementing network security measures, restricting access privileges, and staying informed about security alerts are essential practices to enhance the overall security posture.

Patching and Updates

Regularly updating MySQL Server to the latest secure versions and applying patches promptly can help mitigate the risks associated with CVE-2021-2367.