CVE-2021-2009 : Exploit Details and Defense Strategies

This article provides detailed information about CVE-2021-2009, a vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Security: Roles) affecting versions 8.0.19 and prior.

Understanding CVE-2021-2009

CVE-2021-2009 is a vulnerability in Oracle MySQL Server that allows a high privileged attacker with network access to compromise the server. It can result in a denial of service (DoS) by causing the server to hang or crash.

What is CVE-2021-2009?

The vulnerability in MySQL Server (Oracle Corporation) versions 8.0.19 and prior allows an attacker to exploit the server via multiple protocols, potentially leading to a complete DoS by crashing or hanging the server.

The Impact of CVE-2021-2009

Successful exploitation of this vulnerability can allow unauthorized access to compromise the MySQL Server, impacting its availability with a CVSS 3.1 Base Score of 4.9 (Availability impacts).

Technical Details of CVE-2021-2009

This section covers the technical aspects of the CVE-2021-2009 vulnerability.

Vulnerability Description

The vulnerability in MySQL Server allows a high privileged attacker with network access to compromise the server, resulting in a complete DoS by causing it to hang or crash.

Affected Systems and Versions

Oracle MySQL Server versions 8.0.19 and earlier are impacted by this vulnerability.

Exploitation Mechanism

The vulnerability can be exploited by a high privileged attacker with network access via multiple protocols to compromise the MySQL Server.

Mitigation and Prevention

To protect systems from CVE-2021-2009, it is crucial to implement the following mitigation and prevention measures.

Immediate Steps to Take

Apply patches and updates provided by Oracle Corporation.
Restrict network access to the MySQL Server to trusted sources.

Long-Term Security Practices

Regularly monitor and audit network traffic to detect any suspicious activity.
Keep systems up to date with the latest security patches and updates.

Patching and Updates

Regularly check for security advisories from Oracle Corporation and apply patches promptly to prevent exploitation of known vulnerabilities.