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AUSCERT External Security Bulletin Redistribution
Security Bulletin: DH Key Exchange protocol vulnerability
("Logjam") affects SPSS Data Access Pack
26 August 2015
AusCERT Security Bulletin Summary
Product: IBM SPSS Statistics
Operating System: AIX
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
CVE Names: CVE-2015-4000
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Security Bulletin: DH Key Exchange protocol vulnerability ("Logjam")
affects SPSS Data Access Pack
More support for:
20.0, 21.0, 22.0, 23.0
AIX, HP-UX, Linux, Solaris, Windows
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.
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
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
Download and apply SDAP7.1.1-IF4 to upgrade IBM SPSS Data Access Pack
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
Get Notified about Future Security Bulletins
Subscribe to My Notifications to be notified of important product support
alerts like this.
Complete CVSS v2 Guide
On-line Calculator v2
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
"Logjam" reported to IBM by The WeakDH team at https://weakdh.org.
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
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
Business Analytics SPSS Statistics Not Applicable Platform Independent
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