CVE-2021-35629 : Exploit Details and Defense Strategies

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

Understanding CVE-2021-35629

This section provides detailed insights into the CVE-2021-35629 vulnerability.

What is CVE-2021-35629?

The vulnerability in MySQL Server allows a high-privileged attacker with network access to compromise the server, leading to a DOS attack. This issue impacts versions 8.0.25 and earlier.

The Impact of CVE-2021-35629

A successful exploitation of this vulnerability can result in a complete DOS attack on the MySQL Server, potentially causing it to hang or crash repeatedly. The CVSS 3.1 Base Score for this vulnerability is 4.9 with high availability impacts.

Technical Details of CVE-2021-35629

In this section, the technical aspects of CVE-2021-35629 are discussed.

Vulnerability Description

The vulnerability stems from a flaw in the MySQL Server's Optimizer component, allowing unauthorized privileged access to the server.

Affected Systems and Versions

The vulnerability affects Oracle MySQL Server versions 8.0.25 and prior.

Exploitation Mechanism

Exploitation of this vulnerability requires a high-privileged attacker with network access via multiple protocols.

Mitigation and Prevention

Here, we outline steps to mitigate and prevent the exploitation of CVE-2021-35629.

Immediate Steps to Take

Oracle users should update their MySQL Server to version 8.0.26 or later to eliminate this vulnerability.

Long-Term Security Practices

Maintaining network security measures and restricting high-privileged access can prevent such vulnerabilities.

Patching and Updates

Regularly updating software and patching known vulnerabilities is crucial to enhancing the security posture of IT infrastructure.