Security Bulletin: IBM MQ and IBM MQ Appliance are vulnerable to a denial of service attack caused by a memory leak in the clustering code. (CVE-2019-4141)

Summary

A vulnerability was found in the clustering code that caused a memory leak. This could be exploited by an attacker to execute a denial of service attack against a queue manager.

Vulnerability Details

CVEID: CVE-2019-4141 DESCRIPTION: IBM MQ is vulnerable to a denial of service attack caused by a memory leak in the clustering code.
CVSS Base Score: 5.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/158337&gt; for the current score
CVSS Environmental Score*: Undefined
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

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 - 8.0.0.11

IBM MQ V9 LTS

versions 9.0.0.0 - 9.0.0.6

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 9.1.1 - 9.1.2

Remediation/Fixes

IBM WebSphere MQ V7.1

Contact IBM Support requesting a fix for APAR IT27859

IBM WepSphere MQ V7.5

Contact IBM Support requesting a fix for APAR IT27859

IBM MQ and IBM MQ Appliance V8

Apply FixPack 8.0.0.12

IBM MQ V9 LTS

Apply FixPack 9.0.0.7

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