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Security Bulletin: WebSphere MQ for HP NonStop Server is affected by OpenSSL vulnerability CVE-2021-4160

Security Bulletin


WebSphere MQ for HP NonStop Server may be using weaker than expected security due to an algorithmic problem within OpenSSL.

Vulnerability Details

CVEID:   CVE-2021-4160
DESCRIPTION:   OpenSSL could provide weaker than expected security, caused by a carry propagation flaw in the MIPS32 and MIPS64 squaring procedure. An attacker could exploit this vulnerability to launch further attacks on the system
CVSS Base score: 6.7
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
WebSphere MQ V5.3 for HP NonStop Server (MIPS and Itanium)53.1.x



 WebSphere MQ V5.3.1 for HPE NonStop (Itanium) Fixpack  17 IT40195 Install patch IT40195



Workarounds and Mitigations


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Change History

11 May 2022: 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":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSFKSJ","label":"WebSphere MQ"},"Component":"Server","Platform":[{"code":"PF011","label":"HPE NonStop"}],"Version":"5.3.1","Edition":",,,,,,,,,,,,,,,","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
12 May 2022