CVE-2021-2021 Explained : Impact and Mitigation
Learn about the CVE-2021-2021 vulnerability affecting Oracle MySQL Server 8.0.22 and prior versions. Understand the impact, exploitation, and mitigation details.
A vulnerability has been identified in Oracle MySQL Server, specifically in the Optimizer component. This vulnerability, with a CVSS 3.1 Base Score of 4.9, affects versions 8.0.22 and prior. An attacker with network access can exploit this vulnerability to compromise MySQL Server, potentially leading to a denial of service (DOS) attack.
Understanding CVE-2021-2021
This section will provide insights into the nature and impact of the CVE-2021-2021 vulnerability.
What is CVE-2021-2021?
The vulnerability in the MySQL Server product of Oracle MySQL, affecting versions 8.0.22 and prior, allows a high-privileged attacker with network access to compromise MySQL Server. Successful exploitation could result in a complete DOS of MySQL Server.
The Impact of CVE-2021-2021
The vulnerability poses a medium-severity risk with a CVSS Base Score of 4.9, focusing on availability impacts. An attacker could potentially cause a hang or crash of MySQL Server, leading to service disruption.
Technical Details of CVE-2021-2021
In this section, we delve into the technical aspects of the CVE-2021-2021 vulnerability.
Vulnerability Description
The vulnerability in Oracle MySQL Server allows an attacker with network access to compromise the server, leading to a potential denial of service by causing the server to hang or crash.
Affected Systems and Versions
Oracle MySQL Server versions 8.0.22 and prior are affected by this vulnerability.
Exploitation Mechanism
The vulnerability can be easily exploited by a high-privileged attacker with network access through multiple protocols, resulting in unauthorized access to disrupt MySQL Server.
Mitigation and Prevention
This section outlines the measures that can be taken to mitigate the risks associated with CVE-2021-2021.
Immediate Steps to Take
It is recommended to apply relevant security patches provided by Oracle to address this vulnerability promptly. Additionally, restrict network access to the MySQL Server to trusted sources only.
Long-Term Security Practices
Regularly update and maintain the MySQL Server software to ensure that known vulnerabilities are patched to prevent exploitation.
Patching and Updates
Stay informed about security updates and patches released by Oracle for MySQL Server to address vulnerabilities and strengthen the security posture.