Security Bulletin: IBM MQ and IBM MQ Appliance are vulnerable to a denial of service attack caused by specially constructed messages. (CVE-2019-4432)

Summary

An error was found within IBM MQ and IBM MQ Appliance that allows an attacker to perform a denial of service attack by sending specifically crafted messages to a queue manager. Executing this attack will cause the queue manager to stop responding and CPU usage to increase to a high level.

Vulnerability Details

CVEID: CVE-2019-4432 DESCRIPTION: IBM MQ is vulnerable to a denial of service attack caused by specially constructed messages.
CVSS Base Score: 6.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/162889&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

IBM WebSphere MQ V7.1

versions 7.1.0.0 - 7.1.0.9

IBM WepSphere MQ V7.5

versions 7.5.0.0 - 7.5.0.9

IBM MQ and IBM MQ Appliance V8

versions 8.0.0.0 - 8.0.0.12

IBM MQ V9.0LTS

versions 9.0.0.0 - 9.0.0.7

IBM MQ and IBM MQ Appliance V9.1 LTS

versions 9.1.0.0 - 9.1.0.2

IBM MQ and IBM MQ Appliance V9.1 CD

versions 9.1.0 - 9.1.2

Remediation/Fixes

IBM WebSphere MQ V7.1

Contact IBM Support requesting a fix for APAR IT29262

IBM WepSphere MQ V7.5

Contact IBM Support requesting a fix for APAR IT29262

IBM MQ and IBM MQ Appliance V8

Apply Fixpack 8.0.0.13

IBM MQ V9.0LTS

Apply Fixpack 9.0.0.8

IBM MQ and IBM MQ Appliance V9.1 LTS

Apply Fixpack 9.1.0.3

IBM MQ and IBM MQ Appliance V9.1 CD

Upgrade to IBM MQ 9.1.3

Workarounds and Mitigations

None