CVE-2021-2351 Explained : Impact and Mitigation

A vulnerability in the Advanced Networking Option component of Oracle Database Server has been identified as CVE-2021-2351. This CVE affects supported versions 12.1.0.2, 12.2.0.1, and 19c, allowing an unauthenticated attacker with network access via Oracle Net to compromise the Advanced Networking Option. Successful attacks may lead to the takeover of the Advanced Networking Option.

Understanding CVE-2021-2351

This section delves into the specifics of CVE-2021-2351, outlining its impact and technical details.

What is CVE-2021-2351?

The vulnerability in the Advanced Networking Option component of Oracle Database Server allows an unauthenticated attacker with network access to compromise the Advanced Networking Option. Successful attacks may result in the takeover of Advanced Networking Option.

The Impact of CVE-2021-2351

The impact of this vulnerability is significant, with successful attacks having the potential to compromise confidentiality, integrity, and availability. A CVSS 3.1 Base Score of 8.3 classifies the severity as high.

Technical Details of CVE-2021-2351

This section provides more technical insights into CVE-2021-2351, covering vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability allows an unauthenticated attacker with network access via Oracle Net to compromise the Advanced Networking Option.

Affected Systems and Versions

Supported versions affected by CVE-2021-2351 include 12.1.0.2, 12.2.0.1, and 19c of the Oracle Database Server.

Exploitation Mechanism

Successful attacks of this vulnerability may require human interaction and can impact additional products beyond the Advanced Networking Option.

Mitigation and Prevention

To mitigate and prevent the exploitation of CVE-2021-2351, certain immediate steps should be taken along with the implementation of long-term security practices and thorough patching and updates.

Immediate Steps to Take

Security protocols should be reviewed and updated, ensuring network access is limited to authenticated users.

Long-Term Security Practices

Enhanced network monitoring, regular security audits, and user training on identifying phishing attempts are crucial for long-term security.

Patching and Updates

It is essential to apply the July 2021 Critical Patch Update, which introduces changes to Native Network Encryption to address CVE-2021-2351.