Security Bulletin: IBM MQ is vulnerable to a privilege escalation attack when using multiplexed channels (CVE-2018-1974)

Summary

IBM MQ could allow an authenticated attacker to escalate their privileges with channels that have multiplexing enabled.

Vulnerability Details

CVEID: CVE-2018-1974 DESCRIPTION: IBM MQ could allow an authenticated attacker to escalate their privileges when using multiplexed channels.
CVSS Base Score: 7.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/153915&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:H/I:H/A:H)

Affected Products and Versions

IBM MQ v8

• Maintenance levels 8.0.0.0 - 8.0.0.10

IBM MQ v9 LTS

• Maintenance levels 9.0.0.0 - 9.0.0.5

IBM MQ v9.1 CD

• Maintenance levels 9.1.0 - 9.1.1

IBM MQ v9.1 LTS

• Maintenance levels 9.1.0.0 - 9.1.0.1

Remediation/Fixes

IBM MQ v8

• Apply FixPack 8.0.0.11

IBM MQ v9 LTS

• Apply iFix IT24586 for MQ 9.0.0.5

IBM MQ v9.1 CD

• Apply iFix IT24586 for MQ 9.1.1

IBM MQ v9.1 LTS

• Apply iFix IT24586 for MQ 9.1.0.1

Workarounds and Mitigations

Disable multiplexing on channels