ESB-2026.4850

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4850 IBM MQ is affected by a denial of service vulnerability in IBM WebSphere Application Server Liberty (CVE-2024-29371) 8 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: IBM MQ Publisher: IBM Operating System: IBM i Windows AIX Solaris Linux Resolution: Patch/Upgrade CVE Names: CVE-2024-29371 Original Bulletin: https://www.ibm.com/support/pages/node/7271937 Comment: CVSS (Max): 7.5 CVE-2024-29371 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) CVSS Source: IBM Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H EPSS (Max): 0.0% (6th)* CVE-2024-29371 2026-05-07 * Not all EPSS found when published - --------------------------BEGIN INCLUDED TEXT-------------------- IBM Support Document Information Document number : 7271937 Modified date : More support for: IBM MQ Product : IBM MQ Component : - Software version : 9.1, 9.2, 9.3, 9.4 Operating system(s): Windows AIX Solaris Linux IBM i Security Bulletin Summary IBM WebSphere Application Server Liberty is used by IBM MQ as part of the IBM MQ Console and IBM MQ REST API functionality (CVE-2024-29371) Vulnerability Details CVEID: CVE-2024-29371 DESCRIPTION: In jose4j before 0.9.6, an attacker can cause a Denial-of-Service (DoS) condition by crafting a malicious JSON Web Encryption (JWE) token with an exceptionally high compression ratio. When this token is processed by the server, it results in significant memory allocation and processing time during decompression. CWE: CWE-1259: Improper Restriction of Security Token Assignment CVSS Source: CISA ADP CVSS Base score: 7.5 CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) Affected Products and Versions +-------------------+-----------------------+ |Affected Product(s)|Version(s) | +-------------------+-----------------------+ |IBM MQ |9.1.0.0 to 9.1.0.34 LTS| +-------------------+-----------------------+ |IBM MQ |9.2.0.0 to 9.2.0.41 LTS| +-------------------+-----------------------+ |IBM MQ |9.3.0.0 to 9.3.0.37 LTS| +-------------------+-----------------------+ |IBM MQ |9.3.0.0 to 9.3.5.1 CD | +-------------------+-----------------------+ |IBM MQ |9.4.0.0 to 9.4.0.20 LTS| +-------------------+-----------------------+ |IBM MQ |9.4.0.0 to 9.4.5.0 CD | +-------------------+-----------------------+ The following installable IBM MQ components are affected by the vulnerability: - REST API and Console 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 https://www.ibm.com/support/pages/ installable-component-names-used-ibm-mq-security-bulletins Remediation/Fixes This issue was addressed under Known Issue DT464471 IBM MQ version 9.1 LTS Apply cumulative security update 9.1.0.36 IBM MQ version 9.2 LTS Apply cumulative security update 9.2.0.42 IBM MQ version 9.3 LTS Apply fix pack 9.3.0.40 IBM MQ version 9.4 LTS Apply cumulative security update 9.4.0.21 IBM MQ version 9.3 CD and 9.4 CD Upgrade to IBM MQ version 9.4.5.1 Workarounds and Mitigations None Change History *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. Disclaimer 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. - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. 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