CVE-2021-35557 : Vulnerability Insights and Analysis

This CVE-2021-35557 affects the Core RDBMS component of Oracle Database Server, specifically versions 12.1.0.2, 12.2.0.1, 19c, and 21c. It is an easily exploitable vulnerability that allows a low-privileged attacker with Create Table privilege and network access via Oracle Net to compromise the Core RDBMS, potentially leading to a partial denial of service.

Understanding CVE-2021-35557

CVE-2021-35557 is a vulnerability in Oracle Database Server that poses a security risk to the affected versions.

What is CVE-2021-35557?

The vulnerability in the Core RDBMS component of Oracle Database Server can be exploited by a low-privileged attacker to compromise the system, resulting in a partial denial of service.

The Impact of CVE-2021-35557

Successful exploitation of this vulnerability can lead to unauthorized individuals causing a partial denial of service in the Core RDBMS, affecting the availability of the database.

Technical Details of CVE-2021-35557

This section provides more in-depth technical details about the vulnerability.

Vulnerability Description

CVE-2021-35557 allows attackers with limited privileges to exploit the Core RDBMS component, potentially causing a partial denial of service.

Affected Systems and Versions

The affected systems include Oracle Database Server versions 12.1.0.2, 12.2.0.1, 19c, and 21c.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging network access via Oracle Net and possessing Create Table privilege.

Mitigation and Prevention

To protect your systems from CVE-2021-35557, consider the following mitigation strategies.

Immediate Steps to Take

Apply security patches provided by Oracle to address the vulnerability promptly.
Restrict network access to the Oracle Database Server to trusted entities.

Long-Term Security Practices

Regularly update and patch your Oracle Database Server to prevent known vulnerabilities.
Follow the principle of least privilege to limit the capabilities of potential attackers.

Patching and Updates

Stay informed about security updates released by Oracle Corporation and apply them as soon as they are available to strengthen the security of your database.