Security Bulletin: IBM MQ clients are vulnerable to a denial of service attack caused by consuming specifically crafted messages (CVE-2019-4261)

Summary

An error was found with the IBM MQ client message handling logic that causes a denial of service attack when specifically crafted messages are consumed.

Vulnerability Details

CVEID: CVE-2019-4261 DESCRIPTION: IBM MQ Clients are vulnerable to a denial of service attack caused by specially crafted messages.
CVSS Base Score: 4.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/160013&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:L)

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 V8

versions 8.0.0.0 - 8.0.0.11

IBM MQ V9.0LTS

versions 9.0.0.0 - 9.0.0.6

IBM MQ V9.1 LTS

versions 9.1.0.0 - 9.1.0.2

IBM MQ V9.1 CD

versions 9.1.0 - 9.1.2

Remediation/Fixes

IBM WebSphere MQ V7.1

Contact IBM Support to request a fix for APAR IT25916

IBM WepSphere MQ V7.5

Contact IBM Support to request a fix for APAR IT25916

IBM MQ V8

Apply Fixpack 8.0.0.12

IBM MQ V9.0LTS

Apply Fixpack 9.0.0.7

IBM MQ V9.1 LTS

Apply Fixpack 9.1.0.3

IBM MQ V9.1 CD

Upgrade to IBM MQ 9.1.3

Workarounds and Mitigations

None