Security Bulletin: IBM MQ and IBM MQ Appliance are vulnerable to a denial of service attack caused by an error within the Data Conversion routine (CVE-2019-4655)

Summary

An error was found within the IBM MQ message data conversion processing code that could cause multiple failure data capture (FDC) records to be generated and prevent the channel handling process amqrmppa from handling requests.

Vulnerability Details

CVEID:CVE-2019-4655
**DESCRIPTION:**IBM MQ is vulnerable to a denial of service attack that would allow an authenticated user to reset client connections due to an error within the Data Conversion routine.
CVSS Base score: 4.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/170966 for the current score.
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

Remediation/Fixes

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