CVE-2023-21827 : Vulnerability Insights and Analysis

This CVE-2023-21827 information pertains to a vulnerability found in the Oracle Database Data Redaction component of the Oracle Database Server. This vulnerability affects versions 19c and 21c of the Oracle Database Enterprise Edition. A low privileged attacker with the Create Session privilege and network access via Oracle Net can exploit this vulnerability, potentially leading to unauthorized read access to a subset of Oracle Database Data Redaction data.

Understanding CVE-2023-21827

This section delves deeper into the details of CVE-2023-21827, including its impact, technical aspects, and mitigation strategies.

What is CVE-2023-21827?

CVE-2023-21827 is an easily exploitable vulnerability within the Oracle Database Data Redaction component of the Oracle Database Server. It allows a low privileged attacker with the Create Session privilege and network access via Oracle Net to compromise Oracle Database Data Redaction, resulting in unauthorized access to specific data.

The Impact of CVE-2023-21827

The impact of this vulnerability is the potential for unauthorized read access to a subset of Oracle Database Data Redaction accessible data. It poses a confidentiality risk and has a CVSS 3.1 Base Score of 4.3 (Confidentiality impacts).

Technical Details of CVE-2023-21827

In this section, we explore the technical aspects of CVE-2023-21827, including vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows a low privileged attacker with the Create Session privilege and network access via Oracle Net to compromise Oracle Database Data Redaction, leading to unauthorized read access to a subset of data.

Affected Systems and Versions

The vulnerability impacts Oracle Database - Enterprise Edition versions 19c and 21c.

Exploitation Mechanism

Attackers with low privileges can exploit this vulnerability using network access via Oracle Net and the Create Session privilege to gain unauthorized access to Oracle Database Data Redaction data.

Mitigation and Prevention

To protect systems from CVE-2023-21827, it is crucial to take immediate steps, establish long-term security practices, and ensure timely patching and updates.

Immediate Steps to Take

Monitor for any suspicious activity related to Oracle Database Data Redaction.
Implement least privilege access controls to restrict privileges for users.
Stay informed about security updates from Oracle and apply them promptly.

Long-Term Security Practices

Regularly review and update security policies.
Conduct security training for staff to increase awareness of potential vulnerabilities.
Perform periodic security audits and assessments to identify and address any security gaps.

Patching and Updates

Oracle regularly releases security patches and updates to address vulnerabilities like CVE-2023-21827. It is crucial to stay current with these patches to secure Oracle Database environments.