CVE-2021-35638 : Security Advisory and Response

A vulnerability has been identified in the MySQL Server product of Oracle MySQL, specifically in the Server Optimizer component. This vulnerability affects versions 8.0.26 and prior, posing a risk to the security of the MySQL Server.

Understanding CVE-2021-35638

This section will provide insights into the nature of the CVE-2021-35638 vulnerability.

What is CVE-2021-35638?

The vulnerability in the MySQL Server product of Oracle MySQL, particularly in the Server Optimizer component, allows a high privileged attacker with network access to compromise the MySQL Server. The affected versions are 8.0.26 and prior. Successful exploitation of this vulnerability can lead to an unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of the MySQL Server.

The Impact of CVE-2021-35638

The vulnerability's impact is significant, with a CVSS 3.1 Base Score of 4.9, highlighting high availability impacts. Understanding the severity and implications of this vulnerability is crucial for effective mitigation.

Technical Details of CVE-2021-35638

In this section, the technical aspects of CVE-2021-35638 will be elaborated.

Vulnerability Description

The vulnerability in the MySQL Server product of Oracle MySQL allows a high privileged attacker with network access to compromise the server. It can result in unauthorized actions leading to server crashes and hangs, affecting the availability of the MySQL service.

Affected Systems and Versions

The versions affected by CVE-2021-35638 are 8.0.26 and prior. Users operating these versions are vulnerable to exploitation and should take immediate action to mitigate the risk.

Exploitation Mechanism

The vulnerability can be exploited by a high privileged attacker with network access using multiple protocols. Understanding how the vulnerability can be leveraged is essential in implementing effective security measures.

Mitigation and Prevention

This section will outline the necessary steps to mitigate and prevent the CVE-2021-35638 vulnerability.

Immediate Steps to Take

To address the vulnerability, immediate actions such as applying patches, implementing security configurations, and monitoring network activities are recommended. It is crucial to act promptly to safeguard the MySQL Server from potential exploits.

Long-Term Security Practices

Incorporating robust security practices, such as regular security updates, conducting security assessments, and enforcing the principle of least privilege, can enhance the overall security posture of the MySQL Server.

Patching and Updates

Staying informed about security updates released by Oracle Corporation and regularly applying patches to the MySQL Server are essential practices to mitigate the risk posed by CVE-2021-35638.