CVE-2021-2383 : Security Advisory and Response

A vulnerability has been identified in Oracle MySQL Server, specifically affecting versions 8.0.25 and prior. This vulnerability allows a high privileged attacker with network access to compromise the MySQL Server, potentially leading to a complete denial of service (DOS) attack.

Understanding CVE-2021-2383

This section will delve into the details of CVE-2021-2383, covering its impact and technical aspects.

What is CVE-2021-2383?

The vulnerability in MySQL Server's Optimizer component allows an attacker with network access to compromise the server. This can lead to a DOS attack by causing the server to hang or crash.

The Impact of CVE-2021-2383

The impact of this vulnerability is significant as it allows unauthorized users to disrupt the MySQL Server, affecting its availability. The CVSS 3.1 Base Score for this vulnerability is 4.9, indicating a medium severity level.

Technical Details of CVE-2021-2383

In this section, we will explore the technical details of CVE-2021-2383, including the vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability in the MySQL Server product of Oracle MySQL allows high privileged attackers with network access to compromise the server, resulting in a complete DOS attack.

Affected Systems and Versions

Oracle MySQL Server versions 8.0.25 and prior are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability through multiple protocols, allowing them to compromise the MySQL Server and disrupt its normal operation.

Mitigation and Prevention

This section will cover the steps to mitigate the risk posed by CVE-2021-2383 and prevent potential exploits.

Immediate Steps to Take

To address this vulnerability, users are advised to apply the latest patches and updates provided by Oracle Corporation. Additionally, network access to the server should be restricted to authorized users only.

Long-Term Security Practices

It is essential to follow best security practices such as regularly updating the MySQL Server, implementing network security measures, and monitoring for any suspicious activity.

Patching and Updates

Oracle Corporation has released patches to address the vulnerability in MySQL Server. Users should promptly apply these updates to secure their systems and prevent exploitation.