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Security Bulletin: IBM MQ Appliance is affected by a denial of service vulnerability (CVE-2020-4267)

Security Bulletin


IBM MQ Appliance has addressed the following denial of service vulnerability.

Vulnerability Details

CVEID:   CVE-2020-4267
DESCRIPTION:   IBM MQ and MQ Appliance could allow an authenticated user to cause a denial of service due to a memory leak.
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:N/A:H)

Affected Products and Versions

Affected Product(s) Version(s)
IBM MQ Appliance 8.0
IBM MQ Appliance 9.1 LTS
IBM MQ Appliance 9.1 CD


IBM MQ Appliance V8
Apply FixPack

IBM MQ Appliance V9.1 LTS
Apply FixPack

IBM MQ Appliance V9.1 CD
Upgrade to IBM MQ 9.1.5

Workarounds and Mitigations


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Change History

20 Apr 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.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document Location


[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SS5K6E","label":"IBM MQ Appliance"},"ARM Category":[{"code":"a8m0z00000008MzAAI","label":"Security"}],"ARM Case Number":"","Platform":[{"code":"PF004","label":"Appliance"}],"Version":";;;;;;;;;;;;;9.1;;;;;9.1.1;9.1.2;9.1.3;9.1.4","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
22 April 2020