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ESB-2016.0481 - [Win][Linux] IBM B2B Advanced Communications: Access privileged data - Remote with user interaction

Date: 24 February 2016
References: ASB-2016.0004  ESB-2016.0466  ESB-2016.0467.2  ESB-2016.0468  

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0481
       Security Bulletin: Vulnerability in IBM Java SDK affects IBM
                B2B Advanced Communications (CVE-2015-7575)
                             24 February 2016

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

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

Product:           IBM B2B Advanced Communications
Publisher:         IBM
Operating System:  Linux variants
                   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

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg21976813

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

Security Bulletin: Vulnerability in IBM Java SDK affects IBM B2B Advanced
Communications (CVE-2015-7575)

Security Bulletin

Document information

More support for:

B2B Advanced Communications

Software version:

1.0.0

Operating system(s):

Linux, Windows

Reference #:

1976813

Modified date:

2016-02-23

Summary

There is a vulnerability in IBM SDK Java Technology Edition, Version 7.0 that
is used by IBM B2B Advanced Communications. 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 Multi-Enterprise Integration Gateway 1.0 - 1.0.0.1

IBM B2B Advanced Communications 1.0.0.2 - 1.0.0.3

Remediation/Fixes

None

Workarounds and Mitigations

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

Add MD5 to the jdk.certpath.disabledAlgorithms property - for example:
jdk.certpath.disabledAlgorithms=MD2, RSA keySize < 1024,MD5

Add MD5withRSA to the jdk.tls.disabledAlgorithms property - for example:

jdk.tls.disabledAlgorithms=SSLv3, RC4, DH keySize < 768,MD5withRSA

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References

Complete CVSS v3 Guide


On-line Calculator v3

IBM Java SDK Security Bulletin

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

Acknowledgement

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

Change History

23 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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