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Security Bulletin: IBM MQ Appliance is affected by a data corruption vulnerability (CVE-2020-4592)

Security Bulletin


IBM MQ Appliance has addressed a data corruption vulnerability.

Vulnerability Details

CVEID:   CVE-2020-4592
DESCRIPTION:   IBM MQ could allow an authenticated user, under nondefault configuration to cause a data corruption attack due to an error when using segmented messages.
CVSS Base score: 5.3
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N)

Affected Products and Versions

Affected Product(s) Version(s)
IBM MQ Appliance 9.1 LTS
IBM MQ Appliance 9.1 CD


IBM MQ Appliance 9.1 LTS

Apply fixpack, or later maintenance

IBM MQ Appliance 9.1 CD

Upgrade to 9.2.0, or later maintenance*

* The latest available Continuous Delivery (CD) firmware level at the time of publishing is 9.2.0. As this firmware level is also an LTS level, it is valid to apply the LTS fix pack and then update to a subsequent CD release (ie. 9.2.1 CD) once available. Please refer to the IBM MQ FAQ for Long Term Support and Continuous Delivery releases for additional information on LTS and CD releases.

Workarounds and Mitigations


Get Notified about Future Security Bulletins



Change History

02 Nov 2020: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location


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Document Information

Modified date:
17 November 2020