CVE-2020-14836 Explained : Impact and Mitigation
Learn about CVE-2020-14836, a vulnerability in Oracle MySQL Server that allows attackers to compromise the server, potentially leading to a denial of service (DOS) attack. Find out the impacted versions and mitigation steps.
A vulnerability in Oracle MySQL Server (component: Server: Optimizer) allows attackers to compromise the server, potentially leading to a denial of service (DOS) attack.
Understanding CVE-2020-14836
This CVE identifies a security flaw in MySQL Server that could be exploited by attackers with network access.
What is CVE-2020-14836?
The vulnerability in Oracle MySQL Server (component: Server: Optimizer) affects versions 8.0.21 and prior. It allows a low-privileged attacker to compromise the server via multiple protocols, potentially resulting in a DOS attack.
The Impact of CVE-2020-14836
Successful exploitation of this vulnerability can lead to unauthorized actions that cause the MySQL Server to hang or crash, impacting its availability. The CVSS 3.1 Base Score is 6.5, indicating a medium severity level with high availability impact.
Technical Details of CVE-2020-14836
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability in MySQL Server allows low-privileged attackers with network access to compromise the server, potentially causing a DOS attack.
Affected Systems and Versions
- Product: MySQL Server
- Vendor: Oracle Corporation
- Affected Versions: 8.0.21 and prior
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Privileges Required: Low
- User Interaction: None
- Scope: Unchanged
- CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Mitigation and Prevention
Protecting systems from CVE-2020-14836 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches provided by Oracle promptly.
- Monitor network traffic for any suspicious activities.
- Restrict network access to the MySQL Server.
Long-Term Security Practices
- Regularly update and patch MySQL Server to address known vulnerabilities.
- Implement network segmentation to limit the server's exposure.
- Conduct regular security assessments and audits to identify and mitigate risks.
Patching and Updates
- Stay informed about security alerts and updates from Oracle.
- Follow best practices for securing MySQL Server installations.
- Test patches in a controlled environment before applying them to production systems.