Security Bulletin: IBM MQ and IBM MQ Appliance are vulnerable to a denial of service attack caused by an abend while processing messages. (CVE-2019-4560)

Summary

An issue was found within the IBM MQ message processing code that results in an abend while processing a message that was placed on a queue using MQPUT. An attacker could use this to execute a denial of service attack on a queue manager.

Vulnerability Details

CVEID:CVE-2019-4560
**DESCRIPTION:**IBM MQ is vulnerable to a denial of service attack caused by channels processing poorly formatted messages.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/166357 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Remediation/Fixes

IBM WebSphere MQ V7.1
Contact IBM Support requesting a fix for APAR IT30070

IBM WepSphere MQ V7.5
Contact IBM Support requesting a fix for APAR IT30070

IBM MQ and IBM MQ Appliance V8
Apply FixPack 8.0.0.13

IBM MQ V9 LTS
Apply FixPack 9.0.0.8

IBM MQ and IBM MQ Appliance V9.1 LTS
Apply FixPack 9.1.0.4

IBM MQ and IBM MQ Appliance V9.1 CD
Upgrade to IBM MQ 9.1.4

Workarounds and Mitigations

None