CVE-2021-2196 Explained : Impact and Mitigation

A vulnerability has been identified in Oracle MySQL Server (versions 8.0.23 and prior) that could allow a high privileged attacker to compromise the server. This article provides insight into CVE-2021-2196 and outlines its impact, technical details, and mitigation strategies.

Understanding CVE-2021-2196

This section delves into the important aspects of the CVE-2021-2196 vulnerability.

What is CVE-2021-2196?

The vulnerability exists in the Oracle MySQL Server product, specifically in the Server: DML component. Attackers with network access can exploit this flaw to compromise the server, leading to a denial of service (DOS) condition by causing repeated crashes or hangs. The CVSS Base Score for this vulnerability is 4.9, indicating a medium severity with high availability impacts.

The Impact of CVE-2021-2196

Successful exploitation of CVE-2021-2196 can result in unauthorized actions by a high privileged attacker, potentially causing complete DOS of the MySQL Server. This can disrupt operations and lead to service unavailability.

Technical Details of CVE-2021-2196

This section provides technical insights into the CVE-2021-2196 vulnerability.

Vulnerability Description

The vulnerability in MySQL Server allows attackers to compromise the server through network access, potentially leading to crashes or hangs, resulting in a DOS condition.

Affected Systems and Versions

The affected product is the MySQL Server by Oracle Corporation, specifically versions 8.0.23 and earlier.

Exploitation Mechanism

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

Mitigation and Prevention

This section outlines the steps to mitigate and prevent exploitation of CVE-2021-2196.

Immediate Steps to Take

Users are advised to apply security patches promptly and monitor for any unusual server behavior.

Long-Term Security Practices

Implementing strong access controls, network segregation, and regular security updates can help enhance the overall security posture.

Patching and Updates

Regularly update the MySQL Server to the latest version provided by Oracle Corporation to address this vulnerability and strengthen security defenses.