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AUSCERT External Security Bulletin Redistribution
ESB-2015.1951
Security Bulletin:Vulnerability in Diffie-Hellman key exchange protocol
affects Rational Integration Tester component in Rational Test Workbench,
and Rational Test Control Panel component in Rational Test
Workbench and Rational Test Virtualization Server
24 July 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM Rational Test Workbench
IBM Rational Test Virtualization Server
Publisher: IBM
Operating System: AIX
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-2015.1469
ESB-2015.1466
ESB-2015.1463
ESB-2015.1455.2
ESB-2015.1454.2
ESB-2015.1453.2
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=swg21961729
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Security Bulletin:Vulnerability in Diffie-Hellman key exchange protocol
affects Rational Integration Tester component in Rational Test Workbench, and
Rational Test Control Panel component in Rational Test Workbench and Rational
Test Virtualization Server
Security Bulletin
Document information
More support for:
Rational Test Workbench
Rational Integration Tester
Software version:
8.0, 8.0.0.1, 8.0.0.2, 8.0.0.3, 8.0.0.4, 8.0.0.5, 8.0.1, 8.0.1.1, 8.0.1.2,
8.0.1.3, 8.0.1.4, 8.0.1.5, 8.0.1.6, 8.5, 8.5.0.1, 8.5.0.2, 8.5.0.3, 8.5.0.4,
8.5.1, 8.5.1.1, 8.5.1.2, 8.5.1.3, 8.5.1.4, 8.5.1.5, 8.6, 8.6.0.1, 8.6.0.2,
8.6.0.3, 8.6.0.4, 8.7, 8.7.0.1, 8.7.0.2
Operating system(s):
AIX, Linux, Solaris, Windows
Reference #:
1961729
Modified date:
2015-07-23
Summary
The Logjam Attack on TLS connections using the Diffie-Hellman (DH) key
exchange protocol affects Rational Integration Tester component in Rational
Test Workbench, and Rational Test Control Panel component in Rational Test
Workbench and Rational Test Virtualization Server
Vulnerability Details
CVE ID: 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
Rational Integration Tester component in Rational Test Workbench, and Rational
Test Control Panel component in Rational Test Workbench and Rational Test
Virtualization Server versions:
All versions from 8.0 up to and including 8.7.0.2
Remediation/Fixes
The fixes for the CVE(s) mentioned above have been incorporated into an
interim fix available on IBM Fix Central. Upgrade your installation as
follows:
1. Download the interim fix entitled either 'Rational-RTW-JavaPatch-LogJam'
or 'Rational-RTVS-JavaPatch-LogJam' and unzip the contents into a temporary
directory
2. Locate the sub-directory from within the extracted zip relevant to your
version of the product (the sub-directories are named by version)
3. Exit Rational Integration Tester if it is open and stop Rational Test
Control Panel, agents and proxies if they are running
4. Copy the java.security file from within the appropriate sub-directory
located in step (2) into the following product install locations:
RationalIntegrationTester/jre/lib/security
RationalTestControlPanel/jre/lib/security
RIT-Agent/jre/lib/security
RIT-Platform/jre/lib/security (only for versions earlier than 8.7)
Note the default install location is C:\Program Files\IBM (Windows) or
/opt/IBM (AIX / Linux / Solaris)
5. Restart the products
Notes:
When updating an installation to a later version, the security fix
detailed above will have to be re-applied after the update
You should verify applying this configuration change does not cause any
compatibility issues. 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.
For the unsupported version 5.4.0, IBM recommends upgrading to a fixed,
supported version of the product.
Workarounds and Mitigations
None
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References
Complete CVSS v2 Guide
On-line Calculator v2
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Acknowledgement
Reported to IBM by The WeakDH team at https://weakdh.org
*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.
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