CVE-2021-2076 Explained : Impact and Mitigation
Explore the details of CVE-2021-2076, a vulnerability in Oracle MySQL Server versions 8.0.22 and prior, allowing high privileged attackers to compromise the server and cause denial-of-service.
This article provides insights into CVE-2021-2076, a vulnerability in Oracle MySQL Server that could allow a high privileged attacker to compromise the server.
Understanding CVE-2021-2076
This section delves into the details of the vulnerability, its impact, technical aspects, and mitigation strategies.
What is CVE-2021-2076?
The vulnerability in Oracle MySQL Server (component: Server: Optimizer) affects versions 8.0.22 and prior. It allows a high privileged attacker with network access to compromise the server, potentially leading to a complete denial-of-service (DOS) attack.
The Impact of CVE-2021-2076
Successful exploitation of this vulnerability can result in unauthorized access to hang or crash the MySQL Server, impacting its availability. The CVSS 3.1 Base Score is 4.9 (Availability impacts).
Technical Details of CVE-2021-2076
This section covers the technical aspects of the vulnerability, including its description, affected systems, and exploitation mechanism.
Vulnerability Description
The vulnerability allows an attacker with network access to compromise MySQL Server, potentially causing a DOS attack by hanging or crashing the server.
Affected Systems and Versions
Oracle MySQL Server versions 8.0.22 and prior are confirmed to be affected by this vulnerability.
Exploitation Mechanism
The vulnerability is easily exploitable via multiple protocols by a high privileged attacker with network access to compromise the server.
Mitigation and Prevention
This section outlines the steps to mitigate and prevent the exploitation of CVE-2021-2076.
Immediate Steps to Take
It is recommended to update Oracle MySQL Server to a patched version beyond 8.0.22 to prevent exploitation of this vulnerability.
Long-Term Security Practices
Implementing network security measures and restricting high privileged access can enhance the overall security posture.
Patching and Updates
Regularly apply security patches and updates provided by Oracle Corporation to address known vulnerabilities and enhance server security.