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Security Bulletin: IBM MQ is affected by multiple vulnerabilities in the IBM Runtime Environment, Java Technology Edition (CVE-2024-20952 and CVE-2023-33850)

Security Bulletin


Multiple issues were identified with IBM Runtime Environment, Java Technology Edition, Version 8 which is shipped with IBM MQ.

CVE-2023-33850 covers the GSKIT-Crypto (ICC) package used by IBM Runtime Environment, Java Technology Edition. This is separate to the GSKit-SSL package which is installed with the Server and MQI client components.

Vulnerability Details

CVEID:   CVE-2024-20952
DESCRIPTION:   An unspecified vulnerability in Java SE related to the Security component could allow a remote attacker to cause high confidentiality impact and high integrity impact.
CVSS Base score: 7.4
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)

CVEID:   CVE-2023-33850
DESCRIPTION:   IBM GSKit-Crypto could allow a remote attacker to obtain sensitive information, caused by a timing-based side channel in the RSA Decryption implementation. By sending an overly large number of trial messages for decryption, an attacker could exploit this vulnerability to obtain sensitive information. IBM X-Force ID: 257132.
CVSS Base score: 7.5
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

Affected Product(s) Version(s)

The following installable MQ components are affected by the vulnerability:

- IBM MQ Explorer
- Managed File Transfer
- Java JRE

If you are running any of these listed components, please apply the remediation/fixes as described below. For more information on the definitions of components used in this list see


This issue was addressed under APAR IT45762

IBM MQ version 9.0 LTS

Apply Cumulative Security Update 

IBM MQ version 9.1 LTS

Apply Cumulative Security Update 

IBM MQ version 9.2 LTS

Apply Fix Pack  

IBM MQ version 9.3 LTS

Apply Cumulative Security Update  

IBM MQ version 9.3 CD

Apply Cumulative Security Update 

Workarounds and Mitigations


Get Notified about Future Security Bulletins




Change History

26 Apr 2024: 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. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location


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Document Information

Modified date:
26 April 2024