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Security Bulletin: IBM MQ Appliance is affected by Mozilla Network Security Services (NSS) vulnerability (CVE-2020-25648)

Security Bulletin


IBM MQ Appliance has resolved a Mozilla Network Security Services (NSS) vulnerability.

Vulnerability Details

CVEID:   CVE-2020-25648
DESCRIPTION:   Mozilla Network Security Services (NSS), as used in Mozilla Firefox is vulnerable to a denial of service, caused by improper handling of CCS (ChangeCipherSpec) messages in TLS. By sending specially-crafted CCS messages, a remote attacker could exploit this vulnerability to cause the system to crash.
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)
IBM MQ Appliance 9.2 LTS
IBM MQ Appliance 9.2 CD
IBM MQ Appliance 9.1 LTS
IBM MQ Appliance 9.1 CD


This vulnerability is addressed under APAR IT37279.
IBM MQ Appliance version 9.1 LTS
IBM MQ Appliance version 9.1 CD
Upgrade to 9.2.2 CD interim fix firmware for IT37279, or later firmware.
IBM MQ Appliance version 9.2 LTS
IBM MQ Appliance version 9.2 CD

Workarounds and Mitigations


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Change History

24 Jun 2021: 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.


Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location


[{"Type":"MASTER","Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SS5K6E","label":"IBM MQ Appliance"},"Version":"All Versions"}]

Document Information

Modified date:
09 July 2021