CVE-2019-2420 : What You Need to Know

Oracle MySQL Server component, particularly the optimizer, has a vulnerability affecting versions 5.7.24 and earlier, as well as 8.0.13 and earlier. This vulnerability can be exploited by a highly privileged attacker with network access, potentially leading to a denial-of-service situation.

Understanding CVE-2019-2420

This CVE involves a vulnerability in the Oracle MySQL Server component, impacting specific versions and potentially compromising the server's availability.

What is CVE-2019-2420?

Vulnerability in the Oracle MySQL Server component, particularly the optimizer
Affects versions 5.7.24 and earlier, and 8.0.13 and earlier
Exploitable by a highly privileged attacker with network access
Can lead to unauthorized actions causing the server to hang or crash, resulting in a denial-of-service situation

The Impact of CVE-2019-2420

CVSS 3.0 Base Score: 4.9 (impacts on availability)
Attack vector: (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)

Technical Details of CVE-2019-2420

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows a highly privileged attacker with network access to compromise the MySQL Server, potentially leading to a denial-of-service situation.

Affected Systems and Versions

Product: MySQL Server
Vendor: Oracle Corporation
Versions affected: 5.7.24 and prior, 8.0.13 and prior

Exploitation Mechanism

Highly privileged attacker with network access can exploit the vulnerability
Successful attacks can cause the server to hang or crash, leading to a denial-of-service situation

Mitigation and Prevention

Protecting systems from CVE-2019-2420 requires immediate steps and long-term security practices.

Immediate Steps to Take

Apply vendor patches and updates promptly
Monitor network traffic for any suspicious activity
Restrict network access to the MySQL Server

Long-Term Security Practices

Regularly update and patch all software components
Implement strong access controls and authentication mechanisms
Conduct regular security audits and assessments
Stay informed about security advisories and best practices
Consider implementing network intrusion detection systems

Patching and Updates

Oracle, Ubuntu, Red Hat, and other vendors have released patches to address this vulnerability
Ensure all affected systems are updated with the latest patches and security fixes