CVE-2019-4378 : Security Advisory and Response

IBM MQ command server versions 7.5.0.0 - 7.5.0.9, 7.1.0.0 - 7.1.0.9, 8.0.0.0 - 8.0.0.12, 9.0.0.0 - 9.0.0.6, 9.1.0.0 - 9.1.0.2, and 9.1.0 - 9.1.2 are vulnerable to a denial of service attack.

Understanding CVE-2019-4378

This CVE involves a vulnerability in IBM MQ command server versions that can be exploited for a denial of service attack.

What is CVE-2019-4378?

The vulnerability in IBM MQ command server versions allows an authenticated and authorized user to launch a denial of service attack using manipulated PCF messages.

The Impact of CVE-2019-4378

The vulnerability has a CVSSv3 base score of 5.3 (Medium severity) and can result in a high impact on availability.

Technical Details of CVE-2019-4378

The technical details of the CVE provide insight into the vulnerability and its implications.

Vulnerability Description

The vulnerability in IBM MQ command server versions allows for a denial of service attack through manipulated PCF messages.

Affected Systems and Versions

IBM MQ versions 7.5.0.0 - 7.5.0.9
IBM MQ versions 7.1.0.0 - 7.1.0.9
IBM MQ versions 8.0.0.0 - 8.0.0.12
IBM MQ versions 9.0.0.0 - 9.0.0.6
IBM MQ versions 9.1.0.0 - 9.1.0.2
IBM MQ versions 9.1.0 - 9.1.2

Exploitation Mechanism

The vulnerability can be exploited by an authenticated and authorized user sending specially crafted PCF messages to the IBM MQ command server.

Mitigation and Prevention

To address CVE-2019-4378, certain steps need to be taken to mitigate the risk and prevent potential attacks.

Immediate Steps to Take

Apply official fixes provided by IBM for the affected versions.
Monitor and restrict access to the IBM MQ command server to authorized personnel.

Long-Term Security Practices

Regularly update and patch IBM MQ installations to ensure the latest security measures are in place.
Conduct security training for personnel to recognize and respond to potential threats.

Patching and Updates

Stay informed about security bulletins and updates from IBM regarding the IBM MQ command server.
Implement patches promptly to address known vulnerabilities.