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Security Bulletin: IBM MQ and IBM MQ Appliance are vulnerable to a denial of service attack within the TLS key renegotiation functions (CVE-2019-4055)

Security Bulletin


Summary

A vulnerability was discovered within the TLS key renegotiation functions which could be exploited to execute a denial of service attack against an IBM MQ queue manager.

Vulnerability Details

CVEID: CVE-2019-4055
DESCRIPTION: IBM MQ is vulnerable to a denial of service attack within the TLS key renegotiation function.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/156564 for the current score
CVSS Environmental Score*: Undefined
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

IBM MQ and IBM MQ Appliance V8
versions 8.0.0.0 - 8.0.0.10

IBM MQ V9 LTS
versions 9.0.0.0 - 9.0.0.5

IBM MQ and IBM MQ Appliance V9.1 LTS
versions 9.1.0.0 - 9.1.0.1

IBM MQ and IBM MQ Appliance V9.1 CD
versions 9.1.0 - 9.1.1

Remediation/Fixes

IBM MQ and IBM MQ Appliance V8

IBM MQ V9 LTS

IBM MQ and IBM MQ Appliance V9.1 LTS

IBM MQ and IBM MQ Appliance V9.1 CD


Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

16 April 2019: Original version published

*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.


Cross reference information
Product Component Platform Version Edition
IBM MQ Appliance Appliance 8.0.0.0, 8.0.0.1, 8.0.0.3, 8.0.0.4, 8.0.0.5, 8.0.0.6, 8.0.0.7, 8.0.0.8, 8.0.0.9, 8.0.0.10, 9.1.0.0, 9.1.0.1, 9.1.1

Document information

More support for: IBM MQ

Component: channels

Software version: 8.0.0.0, 8.0.0.1, 8.0.0.2, 8.0.0.3, 8.0.0.4, 8.0.0.5, 8.0.0.6, 8.0.0.7, 8.0.0.8, 8.0.0.9, 8.0.0.10, 9.0.0.0, 9.0.0.1, 9.0.0.2, 9.0.0.3, 9.0.0.4, 9.0.0.5, 9.1.0.0, 9.1.0.1, 9.1.1

Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows

Reference #: 0870484

Modified date: 16 April 2019