CVE-2021-2426 Explained : Impact and Mitigation
Discover the impact of CVE-2021-2426, a vulnerability affecting MySQL Server versions 8.0.25 and prior by Oracle Corporation. Learn about the exploit and mitigation steps.
A vulnerability has been identified in the MySQL Server product of Oracle MySQL, specifically in the Server Optimizer component. This vulnerability affects versions 8.0.25 and prior. An attacker with high privileges and network access can exploit this vulnerability, potentially leading to unauthorized manipulation of the MySQL Server, including causing it to hang or crash. The CVSS 3.1 Base Score is 4.9, indicating medium severity with high availability impact.
Understanding CVE-2021-2426
This section delves into the specifics of CVE-2021-2426.
What is CVE-2021-2426?
The vulnerability affects the MySQL Server product of Oracle MySQL, allowing a high privileged attacker with network access to compromise the server. Successful exploitation could lead to a complete denial of service (DOS) by causing the server to hang or crash.
The Impact of CVE-2021-2426
The impact of this vulnerability is rated with a CVSS 3.1 Base Score of 4.9 (Medium severity) with high availability impact. An attacker can exploit this vulnerability to compromise the MySQL Server, leading to potential DOS.
Technical Details of CVE-2021-2426
This section explores the technical aspects of CVE-2021-2426.
Vulnerability Description
The vulnerability allows an attacker with network access to compromise the MySQL Server, potentially leading to a DOS by causing repeated crashes or hangs.
Affected Systems and Versions
The Oracle MySQL Server versions 8.0.25 and prior are affected by this vulnerability.
Exploitation Mechanism
The vulnerability can be exploited by an attacker with high privileges and network access via various protocols to compromise the MySQL Server.
Mitigation and Prevention
This section outlines the steps to mitigate and prevent exploitation of CVE-2021-2426.
Immediate Steps to Take
It is recommended to apply security patches provided by Oracle to address this vulnerability promptly. Additionally, restrict network access to the MySQL Server to trusted sources.
Long-Term Security Practices
Regularly monitor security advisories from Oracle and keep the MySQL Server updated with the latest security patches to prevent exploitation of known vulnerabilities.
Patching and Updates
Ensure that the MySQL Server is regularly updated with the latest patches released by Oracle to mitigate the risk of exploitation.