CVE-2020-2923 : Security Advisory and Response
Learn about CVE-2020-2923, a vulnerability in MySQL Server by Oracle Corporation allowing high privileged attackers to compromise the server. Find mitigation steps here.
A vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer) allows a high privileged attacker to compromise the server. The affected versions are 8.0.19 and prior.
Understanding CVE-2020-2923
This CVE involves a vulnerability in the MySQL Server product of Oracle MySQL, impacting versions 8.0.19 and earlier.
What is CVE-2020-2923?
The vulnerability in the MySQL Server product of Oracle MySQL allows a high privileged attacker with network access to compromise the server. Successful exploitation can lead to a complete denial of service (DOS) by causing the server to hang or crash repeatedly.
The Impact of CVE-2020-2923
The vulnerability has a CVSS 3.0 Base Score of 4.9, with a medium severity rating due to high availability impact. Attackers can exploit this vulnerability via multiple protocols, potentially resulting in unauthorized server compromise.
Technical Details of CVE-2020-2923
This section provides detailed technical information about the CVE.
Vulnerability Description
The vulnerability in the MySQL Server product of Oracle MySQL allows a high privileged attacker with network access to compromise the server, leading to a complete DOS by causing the server to hang or crash repeatedly.
Affected Systems and Versions
- Product: MySQL Server
- Vendor: Oracle Corporation
- Versions Affected: 8.0.19 and prior
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Privileges Required: High
- User Interaction: None
- Scope: Unchanged
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
Mitigation and Prevention
Protect your systems from CVE-2020-2923 with the following steps:
Immediate Steps to Take
- Apply vendor patches promptly
- Monitor network traffic for signs of exploitation
- Restrict network access to vulnerable systems
Long-Term Security Practices
- Regularly update and patch software
- Conduct security training for staff
- Implement network segmentation and access controls
Patching and Updates
Ensure you apply the latest patches and updates provided by Oracle Corporation to address the vulnerability.