CVE-2021-2356 Explained : Impact and Mitigation
Discover the impact of CVE-2021-2356, a vulnerability in Oracle MySQL Server versions 5.7.34 and prior, and 8.0.25 and prior. Learn about the exploitation mechanism and mitigation steps.
A vulnerability has been discovered in the MySQL Server product of Oracle MySQL, impacting versions 5.7.34 and prior, as well as 8.0.25 and prior. This vulnerability could allow a low-privileged attacker with network access to compromise the MySQL Server, leading to unauthorized data manipulation and a denial of service (DOS) condition.
Understanding CVE-2021-2356
This section delves into the specifics of CVE-2021-2356.
What is CVE-2021-2356?
The vulnerability in the MySQL Server product of Oracle MySQL allows attackers with network access to compromise the server, potentially leading to a complete DOS condition and unauthorized data manipulation.
The Impact of CVE-2021-2356
Successful exploitation of this vulnerability could result in unauthorized access to MySQL Server data, including the ability to cause a server crash and unauthorized data manipulation. The CVSS 3.1 Base Score is 5.9, indicating medium severity.
Technical Details of CVE-2021-2356
This section covers the technical aspects of CVE-2021-2356.
Vulnerability Description
The vulnerability is difficult to exploit but could allow a low-privileged attacker to compromise the MySQL Server, leading to unauthorized data access and a complete DOS condition.
Affected Systems and Versions
The affected systems include MySQL Server versions 5.7.34 and earlier, as well as 8.0.25 and earlier.
Exploitation Mechanism
Attackers with network access can exploit this vulnerability through multiple protocols, gaining unauthorized data manipulation capabilities.
Mitigation and Prevention
Here, we discuss steps to mitigate and prevent potential exploits of CVE-2021-2356.
Immediate Steps to Take
It is recommended to apply security patches provided by the vendor to address this vulnerability. Additionally, restrict network access to the MySQL Server to trusted entities only.
Long-Term Security Practices
Regularly update the MySQL Server to the latest version and ensure that security configurations are appropriately set to prevent unauthorized access.
Patching and Updates
Stay informed about security updates released by Oracle for MySQL Server and promptly apply them to safeguard against known vulnerabilities.