CVE-2021-2056 Explained : Impact and Mitigation

A vulnerability has been identified in the MySQL Server product of Oracle MySQL, specifically within the DML server component. This vulnerability affects version 8.0.22 and prior, potentially allowing a high privileged attacker to compromise the MySQL Server.

Understanding CVE-2021-2056

This section provides insight into the nature and implications of CVE-2021-2056.

What is CVE-2021-2056?

The vulnerability in MySQL Server product of Oracle MySQL (component: Server: DML) impacts versions 8.0.22 and earlier. It is challenging to exploit, enabling a high privileged attacker with network access to compromise the MySQL Server. Successful exploitation may lead to a complete denial of service (DOS) by causing crashes or hangs within the server.

The Impact of CVE-2021-2056

The vulnerability poses a medium severity risk, with a CVSS 3.1 Base Score of 4.4. It primarily affects the availability of the MySQL Server and could be exploited by attackers with high privileges and network access.

Technical Details of CVE-2021-2056

In this section, we delve into the technical aspects of CVE-2021-2056.

Vulnerability Description

The identified vulnerability allows a high privileged attacker, using multiple protocols, to compromise the MySQL Server. By exploiting this flaw, unauthorized actors can trigger repeated crashes or hangs within the server, resulting in a denial of service condition.

Affected Systems and Versions

The vulnerability affects MySQL Server versions 8.0.22 and prior. Users operating on these versions are at risk of exploitation.

Exploitation Mechanism

This vulnerability can be exploited by attackers with high privileges and network access, leveraging multiple protocols to compromise the MySQL Server.

Mitigation and Prevention

In this section, we explore steps to mitigate and prevent the CVE-2021-2056 vulnerability.

Immediate Steps to Take

Organizations should consider upgrading to a patched version of MySQL Server where the vulnerability has been addressed.
Implement network security measures to restrict access to the MySQL Server from untrusted sources.

Long-Term Security Practices

Regularly monitor for security updates and patches released by Oracle for MySQL Server.
Conduct security assessments and audits to identify and address vulnerabilities in the server.

Patching and Updates

Ensure timely installation of security patches and updates provided by Oracle to mitigate the CVE-2021-2056 vulnerability.