CVE-2021-2014 : Exploit Details and Defense Strategies

This article provides detailed information about CVE-2021-2014, a vulnerability in the MySQL Server product of Oracle MySQL that can compromise server integrity and availability.

Understanding CVE-2021-2014

In this section, we will explore what CVE-2021-2014 entails and its potential impact.

What is CVE-2021-2014?

The vulnerability exists in the MySQL Server product of Oracle MySQL, specifically in the Server: PAM Auth Plugin component. It affects versions 5.7.32 and prior, allowing a high privileged attacker with network access to compromise the server.

The Impact of CVE-2021-2014

This vulnerability is easily exploitable and can lead to unauthorized control over MySQL Server. Successful exploitation can result in causing hang or crash, leading to denial of service (DOS) attacks. CVSS 3.1 Base Score: 4.9 (Availability impacts) CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Technical Details of CVE-2021-2014

In this section, we will delve into the technical details of the vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in the PAM Auth Plugin of MySQL Server allows attackers to compromise the server integrity, potentially leading to DOS attacks.

Affected Systems and Versions

The vulnerability affects MySQL Server versions 5.7.32 and prior, exposing them to exploitation by high privileged attackers with network access.

Exploitation Mechanism

Attackers with network access can exploit the vulnerability to compromise MySQL Server, leading to a variety of unauthorized actions and potential DOS attacks.

Mitigation and Prevention

This section focuses on the steps to mitigate the risks posed by CVE-2021-2014 and prevent future vulnerabilities.

Immediate Steps to Take

Users are advised to update MySQL Server to a non-vulnerable version, restrict network access to the server, and monitor for any unusual activities.

Long-Term Security Practices

Implementing strong access controls, regular security audits, and employee training on safe practices can enhance the server's security posture.

Patching and Updates

Oracle and MySQL Server users should regularly check for security updates, patches, and advisories to safeguard against known vulnerabilities.