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ESB-2016.0480 - [Win][Linux][HP-UX][Solaris][AIX] IBM WebSphere MQ: Access privileged data - Remote with user interaction

Date: 24 February 2016
References: ESB-2016.0046  ESB-2016.0047  ESB-2016.0049  ESB-2016.0055  ASB-2016.0004  ESB-2016.0466  ESB-2016.0467.2  ESB-2016.0468  

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Click here for PGP verifiable version
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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0480
       Security Bulletin: Vulnerability in IBM Java Runtime affects
                     IBM WebSphere MQ (CVE-2015-7575)
                             24 February 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM WebSphere MQ
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   Solaris
                   Windows
Impact/Access:     Access Privileged Data         -- Remote with User Interaction
                   Provide Misleading Information -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-7575  

Reference:         ASB-2016.0004
                   ESB-2016.0468
                   ESB-2016.0467
                   ESB-2016.0466
                   ESB-2016.0055
                   ESB-2016.0049
                   ESB-2016.0047
                   ESB-2016.0046

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg21977523

- --------------------------BEGIN INCLUDED TEXT--------------------

Security Bulletin: Vulnerability in IBM Java Runtime affects IBM WebSphere MQ
(CVE-2015-7575)

Security Bulletin

Document information

More support for:

WebSphere MQ

Java

Software version:

7.1, 7.5, 8.0

Operating system(s):

AIX, HP-UX, Linux, Solaris, Windows

Software edition:

All Editions

Reference #:

1977523

Modified date:

2016-02-23

Summary

There is a vulnerability in IBM Runtime Environment Java Technology Edition,
Versions 6 & 7 that is used by IBM WebSphere MQ. This vulnerability, commonly
referred to as SLOTH, was disclosed as part of the IBM Java SDK updates in
January 2016.

Vulnerability Details

CVEID:

CVE-2015-7575

DESCRIPTION:

The TLS protocol could allow weaker than expected security caused by a
collision attack when using the MD5 hash function for signing a
ServerKeyExchange message during a TLS handshake. An attacker could exploit
this vulnerability using man-in-the-middle techniques to impersonate a TLS
server and obtain credentials. This vulnerability is commonly referred to as
SLOTH.

CVSS Base Score: 7.1

CVSS Temporal Score: See

https://exchange.xforce.ibmcloud.com/vulnerabilities/109415

for the current score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/UI:U/C:H/I:L/A:N)

Affected Products and Versions

IBM JRE 7, Java Technology Edition, Version 7 provided by IBM WebSphere MQ
8.0.0.4 and earlier on all platforms (except IBM i and z/OS)

IBM JRE 6, Java Technology Edition, Version 6 provided by IBM WebSphere MQ
7.5.0.5, IBM WebSphere MQ 7.1.0.7 and earlier on all platforms (except IBM i
and z/OS)

Remediation/Fixes

IBM WebSphere MQ 8.0

HP-UX

Apply fix pack 8.0.0.5 when available, in the interim use the workaround
provided below

AIX, Linux, Solaris & Windows

Apply fix pack 8.0.0.5 when available, in the interim apply

ifix IT13492


IBM WebSphere MQ 7.5

Apply fix pack 7.5.0.6 when available, in the interim apply

ifix IT13492


IBM WebSphere MQ 7.1

Apply fix pack 7.1.0.8 when available, in the interim apply

ifix IT13492

Workarounds and Mitigations

For CVE-2015-7575:

Users of Java 7 and later can address the issue by updating the
../jre/lib/security/java.security file as follows (both steps are required):

 Add MD5 to the jdk.certpath.disabledAlgorithms property - e.g.
jdk.certpath.disabledAlgorithms=MD2, RSA keySize < 1024,MD5

 Add MD5withRSA to the jdk.tls.disabledAlgorithms property - e.g.
jdk.tls.disabledAlgorithms=SSLv3, RC4, DH keySize < 768,MD5withRSA

Java 6 requires code changes in the JSSE component in addition to the
java.security file modifications, so upgrading the JRE is the only solution.

Get Notified about Future Security Bulletins

Subscribe to

My Notifications

to be notified of important product support alerts like this.

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.

References

Complete CVSS v3 Guide


On-line Calculator v3

Related information

IBM Secure Engineering Web Portal


IBM Product Security Incident Response Blog

IBM Java SDK Security Bulletin

Acknowledgement

CVE-2015-7575 was reported to IBM by Karthikeyan Bhargavan at INRIA in Paris,
France

Change History

24 February 2016: 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.

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
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