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             AUSCERT External Security Bulletin Redistribution

            Security Bulletin: IBM MQ and IBM MQ Appliance are
           vulnerable to SWEET32 Birthday attack (CVE-2016-2183)
                             23 February 2017


        AusCERT Security Bulletin Summary

Product:           IBM WebSphere MQ
Publisher:         IBM
Operating System:  Linux variants
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-2183  

Reference:         ASB-2017.0005

Original Bulletin: 

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Security Bulletin: IBM MQ and IBM MQ Appliance are vulnerable to SWEET32 Birthday attack (CVE-2016-2183)

Security Bulletin

Document information

More support for: IBM MQ

Software version: 7.0.1, 7.1, 7.5, 8.0, 9.0, 9.0.1

Operating system(s): Platform Independent

Software edition: All Editions

Reference #: 1995099

Modified date: 22 February 2017


A security vulnerability affects IBM MQ and IBM MQ Appliance, that could allow an attacker to obtain sensitive information when using a channel CipherSpec that uses the Triple-DES algorithm. The affected CipherSpecs are:

Vulnerability Details

CVEID: CVE-2016-2183
DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive information, caused by an error in the DES/3DES cipher, used as a part of the SSL/TLS protocol. By capturing large amounts of encrypted traffic between the SSL/TLS server and the client, a remote attacker able to conduct a man-in-the-middle attack could exploit this vulnerability to recover the plaintext data and obtain sensitive information. This vulnerability is known as the SWEET32 Birthday attack.
CVSS Base Score: 3.7
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/116337 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)
Affected Products and Versions

The following versions are affected:

IBM MQ and 9.0.1 only
IBM MQ Appliance
Maintenance levels between and
IBM WebSphere MQ
Maintenance levels between and
Maintenance levels between and
Maintenance levels between and
Maintenance levels between and


IBM Websphere MQ V8.0 & IBM MQ Appliance V8.0
Apply fix pack
Workarounds and Mitigations

All versions of MQ can mitigate the vulnerability either by switching to an alternative CipherSpec or by enabling secret key reset.
Resetting SSL/TLS secret keys

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Important note

IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.
Complete CVSS v3 Guide
On-line Calculator v3

Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

20 February 2017: 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.

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.

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