IBM Support

Security Bulletin: IBM MQ Appliance is affected by an information disclosure vulnerability (CVE-2020-4528)

Security Bulletin


IBM MQ Appliance has resolved an information disclosure vulnerability.

Vulnerability Details

CVEID:   CVE-2020-4528
DESCRIPTION:   IBM MQ Appliance could allow a local user, under special conditions, to obtain highly sensitive information from log files.
CVSS Base score: 5.9
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N)

Affected Products and Versions

Affected Product(s) Version(s)
IBM MQ Appliance 9.1 LTS
IBM MQ Appliance 9.2
IBM MQ Appliance 9.1 CD


IBM MQ Appliance 9.1 LTS

Apply iFix IT33097, or later maintenance

IBM MQ Appliance 9.1 CD

Upgrade to LTS Fixpack, 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.

IBM MQ Appliance 9.2

Apply LTS Fixpack, or later maintenance

Workarounds and Mitigations


Get Notified about Future Security Bulletins



Change History

20 Jul 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"},"Component":"","Platform":[{"code":"PF004","label":"Appliance"}],"Version":";;;;;;;9.1.1;9.1.2;9.1.3;9.1.4;9.1.5;","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
13 October 2020