CVE-2021-2028 : Security Advisory and Response

This article provides detailed information about CVE-2021-2028, a vulnerability in the MySQL Server product of Oracle MySQL, affecting versions 8.0.21 and prior.

Understanding CVE-2021-2028

This section delves into what CVE-2021-2028 entails, its impact, technical details, and mitigation strategies.

What is CVE-2021-2028?

The vulnerability in Oracle MySQL's MySQL Server product (component: InnoDB) allows a high privileged attacker with network access to compromise the server. Successful exploitation can lead to unauthorized actions that disrupt server availability.

The Impact of CVE-2021-2028

The vulnerability, with a CVSS 3.1 Base Score of 4.9, poses a medium severity risk in terms of availability. An attacker could cause a denial of service (DOS) by repeatedly crashing the MySQL Server.

Technical Details of CVE-2021-2028

This section provides specific information on the vulnerability, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The flaw allows attackers with network access to compromise the MySQL Server, potentially causing frequent crashes. The vulnerability is easily exploitable and requires high privileges for the attacker.

Affected Systems and Versions

Oracle MySQL Server versions 8.0.21 and earlier are susceptible to this vulnerability, impacting systems relying on these versions.

Exploitation Mechanism

Attackers with network access can exploit this vulnerability through multiple protocols, compromising the server's integrity and causing availability issues.

Mitigation and Prevention

To safeguard systems from CVE-2021-2028, immediate actions and long-term security practices should be implemented. Regular patching and updates are crucial.

Immediate Steps to Take

Organizations should apply the latest security patches provided by Oracle to mitigate the risk of exploitation. Restricting network access can also minimize exposure.

Long-Term Security Practices

Maintaining updated security protocols, conducting regular vulnerability assessments, and enforcing the principle of least privilege can enhance long-term security posture.

Patching and Updates

Regularly updating Oracle MySQL Server to the latest versions and patch levels is essential. Monitoring security advisories from Oracle and related vendors is recommended to stay informed about emerging threats.