CVE-2019-2956 Explained : Impact and Mitigation

A vulnerability in the Core RDBMS component (jackson-databind) of Oracle Database Server affects versions 12.1.0.2, 12.2.0.1, 18c, and 19c. This vulnerability can be exploited by a low privileged attacker with the Create Session privilege and network access through multiple protocols, potentially leading to unauthorized interference and system crashes.

Understanding CVE-2019-2956

This CVE identifies a vulnerability in Oracle Database Server's Core RDBMS component (jackson-databind) that impacts various versions.

What is CVE-2019-2956?

The vulnerability allows a low privileged attacker with specific privileges and network access to compromise the Core RDBMS system, potentially causing system crashes and unauthorized interference.

The Impact of CVE-2019-2956

Successful exploitation could lead to unauthorized interference and system crashes, impacting system availability.
The vulnerability has a CVSS 3.0 Base Score of 5.7, primarily affecting system availability.

Technical Details of CVE-2019-2956

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability in the Core RDBMS (jackson-databind) component of Oracle Database Server allows attackers to compromise the system, potentially causing system crashes.

Affected Systems and Versions

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

Exploitation Mechanism

Low privileged attackers with the Create Session privilege and network access through multiple protocols can exploit this vulnerability.

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2019-2956.

Immediate Steps to Take

Apply patches provided by Oracle promptly.
Restrict network access to the database server.
Monitor and review database activity for suspicious behavior.

Long-Term Security Practices

Regularly update and patch the Oracle Database Server.
Implement the principle of least privilege to restrict user access.
Conduct security training for database administrators.

Patching and Updates

Oracle has released patches to address this vulnerability. Ensure timely installation of these patches to secure the system.