CVE-2019-4055 : What You Need to Know

IBM MQ versions 8.0.0.0 through 8.0.0.10, 9.0.0.0 through 9.0.0.5, and 9.1.0.0 through 9.1.1 are susceptible to a denial of service vulnerability in the TLS key renegotiation function.

Understanding CVE-2019-4055

This CVE involves a denial of service vulnerability affecting IBM MQ versions.

What is CVE-2019-4055?

The vulnerability in IBM MQ versions allows attackers to launch denial of service attacks through the TLS key renegotiation function.

The Impact of CVE-2019-4055

The vulnerability poses a high availability impact with a CVSS base score of 7.5, indicating a significant threat to affected systems.

Technical Details of CVE-2019-4055

This section covers the technical aspects of the CVE.

Vulnerability Description

The vulnerability in IBM MQ versions enables attackers to exploit the TLS key renegotiation function, leading to denial of service attacks.

Affected Systems and Versions

IBM MQ 8.0.0.0 through 8.0.0.10
IBM MQ 9.0.0.0 through 9.0.0.5
IBM MQ 9.1.0.0 through 9.1.1

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Availability Impact: High
Privileges Required: None
Exploit Code Maturity: Unproven

Mitigation and Prevention

Protecting systems from CVE-2019-4055 is crucial to prevent potential attacks.

Immediate Steps to Take

Apply official fixes provided by IBM to address the vulnerability.
Monitor for any unusual network activity that could indicate exploitation attempts.

Long-Term Security Practices

Regularly update and patch IBM MQ to ensure the latest security enhancements are in place.
Implement network security measures to detect and prevent denial of service attacks.

Patching and Updates

Stay informed about security bulletins and updates from IBM regarding IBM MQ.