Security Bulletin: IBM MQ is vulnerable to a denial of service attack (CVE-2024-31919)

Summary

IBM MQ has addressed a denial of service vulnerability caused by an error processing messages when an API Exit using MQBUFMH is used.

Vulnerability Details

CVEID:CVE-2024-31919
**DESCRIPTION:**IBM MQ, in certain configurations, is vulnerable to a denial of service attack caused by an error processing messages when an API Exit using MQBUFMH is used.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/290259 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

The following installable MQ components are affected by the vulnerability:

- Server

If you are running any of these listed components, please apply the remediation/fixes as described below. For more information on the definitions of components used in this list see <https://www.ibm.com/support/pages/installable-component-names-used-ibm-mq-security-bulletins&gt;

Remediation/Fixes

This issue was addressed under APAR IT45510.

IBM MQ version 9.0 LTS

Apply Cumulative Security Update 9.0.0.26

IBM MQ version 9.1 LTS

Apply Cumulative Security Update 9.1.0.22

IBM MQ version 9.2 LTS

Apply Cumulative Security Update 9.2.0.26

IBM MQ version 9.3 LTS

Apply Fix Pack 9.3.0.20

IBM MQ version 9.3 CD

Upgrade to IBM MQ version 9.4

Workarounds and Mitigations

None