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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.2248
         Security Bulletin: DH Key Exchange protocol vulnerability
                 ("Logjam") affects SPSS Data Access Pack
                              26 August 2015

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

Product:           IBM SPSS Statistics
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   Linux variants
                   Solaris
                   Windows
Impact/Access:     Access Privileged Data         -- Remote/Unauthenticated
                   Provide Misleading Information -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-4000  

Reference:         ASB-2015.0070
                   ASB-2015.0066
                   ESB-2015.1452
                   ESB-2015.1445
                   ESB-2015.1443
                   ESB-2015.1432
                   ESB-2015.1425

Original Bulletin: 
   http://www-01.ibm.com/support/docview.wss?uid=swg21964526

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Security Bulletin: DH Key Exchange protocol vulnerability ("Logjam")
affects SPSS Data Access Pack

Document information

More support for:
SPSS Statistics

Software version:
20.0, 21.0, 22.0, 23.0

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

Reference #:
1964526

Modified date:
2015-08-25

Security Bulletin

Summary

TLS connections using Diffie-Hellman (DH) key exchange protocol affects IBM
SPSS Data Accesss Pack 7.1.1. This attack has been referred to as "Logjam"
in various sources. IBM SPSS Data Access Pack is a software component used
by IBM SPSS Statistics and IBM SPSS Modeler.

Vulnerability Details

CVEID: CVE-2015-4000
DESCRIPTION: The TLS protocol could allow a remote attacker to obtain
sensitive information, caused by the failure to properly convey a DHE_EXPORT
ciphersuite choice. An attacker could exploit this vulnerability using
man-in-the-middle techniques to force a downgrade to 512-bit export-grade
cipher. Successful exploitation could allow an attacker to recover the
session key as well as modify the contents of the traffic. This vulnerability
is commonly referred to as "Logjam".
CVSS Base Score: 4.3
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/103294 for the
current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

Affected Products and Versions

IBM SPSS Modeler 17

IBM SPSS Statistics 23

Remediation/Fixes

Download and apply SDAP7.1.1-IF4 to upgrade IBM SPSS Data Access Pack
V. 7.1.1

Note: You should verify applying this fix does not cause any compatibility
issue in your environment. If you change the default setting after applying
the fix, you will expose yourself to the attack described above. IBM
recommends that you review your entire environment to identify other areas
where you have enabled the Diffie-Hellman key-exchange protocol used in
TLS and take appropriate mitigation and remediation actions.

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

Subscribe to My Notifications to be notified of important product support
alerts like this.

References
Complete CVSS v2 Guide
On-line Calculator v2

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

Acknowledgement

"Logjam" reported to IBM by The WeakDH team at https://weakdh.org.

Change History

25 August 2015: 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

Segment			Product		Component	Platform
Business Analytics	SPSS Modeler	Not Applicable	Platform Independent
17.0
Business Analytics	SPSS Statistics Not Applicable	Platform Independent
23.0

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