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Security Bulletin: IBM MQ Blockchain bridge is vulnerable to an issue identified in snakeyaml (CVE-2022-25857)

Security Bulletin


An issue was identified with the snakeyaml package that is used by the fabric gateway package that is used by the IBM MQ Blockchain bridge package to provide Blockchain functionality in IBM MQ.

Vulnerability Details

CVEID:   CVE-2022-25857
DESCRIPTION:   Java package org.yaml:snakeyam is vulnerable to a denial of service, caused by missing to nested depth limitation for collections. By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause a denial of service.
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:N/I:N/A:H)

Affected Products and Versions

Affected Product(s) Version(s)

The following installable MQ components are affected by the vulnerability:
• IBM MQ Bridge to Blockchain

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 resolved under APAR IT42280

IBM MQ version 9.2 LTS

Apply FixPack

IBM MQ Version 9.3 LTS

Apply FixPack

IBM MQ version 9.2 CD and 9.3 CD

Upgrade to IBM MQ

Workarounds and Mitigations


Get Notified about Future Security Bulletins



Change History

02 Feb 2023: 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


[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"Blockchain Bridge","Platform":[{"code":"PF016","label":"Linux"},{"code":"PF033","label":"Windows"}],"Version":"9.2.0, 9.3.0","Edition":"Advanced","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
03 February 2023