Security Bulletin: IBM MQ and IBM MQ Appliance are vulnerable to a denial of service attack caused by an error within the clustering code. (CVE-2019-4568)

Summary

An error within the IBM MQ Clustering code could cause a denial of service attack by preventing cluster channels from starting.

Vulnerability Details

CVEID:CVE-2019-4568
**DESCRIPTION:**IBM MQ could allow a remote attacker with intimate knowledge of the server to cause a denial of service when receiving data on the channel.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/166629 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

Remediation/Fixes

IBM WebSphere MQ V7.1
Customers with extended support entitlement may contact IBM Support to obtain an interim fix for APAR IT30117

IBM WepSphere MQ V7.5
Customers with extended support entitlement may contact IBM Support to obtain an interim fix for APAR IT30117

IBM MQ and IBM MQ Appliance V8
Apply fix pack 8.0.0.14 or later

IBM MQ V9 LTS
Apply fix pack 9.0.0.8 or later

Workarounds and Mitigations

None