CVE-2020-2511 Explained : Impact and Mitigation

A vulnerability in the Core RDBMS component of Oracle Database Server affecting versions 12.1.0.2, 12.2.0.1, 18c, and 19c.

Understanding CVE-2020-2511

This CVE involves a critical vulnerability in Oracle Database Server that could allow attackers to compromise the Core RDBMS component.

What is CVE-2020-2511?

The vulnerability in the Core RDBMS component of Oracle Database Server impacts versions 12.1.0.2, 12.2.0.1, 18c, and 19c. Attackers with low privileges and network access via OracleNet can exploit this vulnerability to compromise the Core RDBMS, potentially leading to a denial of service (DOS) attack.

The Impact of CVE-2020-2511

Successful exploitation can result in unauthorized access to cause system hang or crashes in the Core RDBMS component.
The vulnerability has a CVSS 3.0 Base Score of 7.7, indicating high availability impact.

Technical Details of CVE-2020-2511

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows low-privileged attackers with Create Session privilege and network access via OracleNet to compromise the Core RDBMS, potentially impacting additional products.

Affected Systems and Versions

Oracle Database versions 12.1.0.2, 12.2.0.1, 18c, and 19c are affected.

Exploitation Mechanism

Attackers can exploit the vulnerability by leveraging network access via OracleNet and low privileges to compromise the Core RDBMS.

Mitigation and Prevention

Protecting systems from CVE-2020-2511 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches provided by Oracle promptly to address the vulnerability.
Monitor and restrict network access to critical components to prevent unauthorized exploitation.

Long-Term Security Practices

Regularly update and patch Oracle Database to mitigate known vulnerabilities.
Implement least privilege access controls to limit the impact of potential attacks.

Patching and Updates

Stay informed about security updates and advisories from Oracle to apply patches as soon as they are available.