CVE-2021-35634 : Exploit Details and Defense Strategies

This article provides detailed information about CVE-2021-35634, a vulnerability in Oracle's MySQL Server that allows attackers to compromise the server.

Understanding CVE-2021-35634

This section delves into the specifics of the vulnerability and its potential impact.

What is CVE-2021-35634?

The vulnerability lies in the MySQL Server product of Oracle MySQL, specifically affecting versions 8.0.26 and prior. It enables a high-privileged attacker with network access to compromise the MySQL Server, leading to a denial-of-service (DOS) attack.

The Impact of CVE-2021-35634

Successful exploitation of this vulnerability can allow attackers to disrupt the MySQL Server, causing frequent crashes or hangs, ultimately impacting its availability. The CVSS 3.1 base score for this vulnerability is 4.9, indicating a medium severity level with high availability impact.

Technical Details of CVE-2021-35634

This section details the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows attackers with network access to compromise MySQL Server, leading to unauthorized server disruptions like hangs or crashes.

Affected Systems and Versions

Oracle MySQL Server versions 8.0.26 and prior are affected by this vulnerability.

Exploitation Mechanism

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

Mitigation and Prevention

Understanding how to mitigate and prevent the exploitation of CVE-2021-35634 is crucial to maintaining system security.

Immediate Steps to Take

Immediately update the MySQL Server to a non-affected version and restrict network access to reduce the attack surface.

Long-Term Security Practices

Regularly monitor for security updates, conduct security audits, and enforce the principle of least privilege to enhance overall security.

Patching and Updates

Stay informed about security bulletins, promptly apply patches released by Oracle, and follow security best practices to protect against CVE-2021-35634.