Security Bulletin: IBM MQ is vulnerable to a denial of service attack within the error logging function (CVE-2019-4039)

Summary

A vulnerability was found within the error logging function that meant that a local attacker could cause an overwrite of arbitrary MQ files and cause a denial of service attack against IBM MQ queue managers.

Vulnerability Details

CVEID: CVE-2019-4039 DESCRIPTION: IBM MQ could allow a local attacker to cause a denial of service within the error log reporting system.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/156163&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

IBM MQ 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 V9.1 LTS

versions 9.1.0.0 - 9.1.0.1

IBM MQ V9.1 CD

versions 9.1.1

Remediation/Fixes

IBM MQ V8

Apply fix pack 8.0.0.12 or later

IBM MQ V9 LTS

Apply fix pack 9.0.0.7 or later

IBM MQ V9.1 LTS

Apply fix pack 9.1.0.2 or later

IBM MQ V9.1 CD

Upgrade to version 9.1.2 or later

Workarounds and Mitigations

None