Date: 24 February 2016
References: ESB-2016.0046 ESB-2016.0047 ESB-2016.0049 ASB-2016.0004 ESB-2016.0468 ESB-2016.0485 ESB-2017.0219
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AUSCERT External Security Bulletin Redistribution
Security Bulletin: Vulnerability in IBM Java SDK affects
Rational Developer for System z (CVE-2015-7575)
24 February 2016
AusCERT Security Bulletin Summary
Product: IBM Rational Developer for System z
Operating System: AIX
Impact/Access: Access Privileged Data -- Remote with User Interaction
Provide Misleading Information -- Remote with User Interaction
CVE Names: CVE-2015-7575
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Security Bulletin: Vulnerability in IBM Java SDK affects Rational Developer
for System z (CVE-2015-7575)
More support for:
Rational Developer for System z
8.5, 18.104.22.168, 8.5.1, 22.214.171.124, 126.96.36.199, 188.8.131.52, 184.108.40.206, 220.127.116.11, 18.104.22.168,
9.0, 22.214.171.124, 9.0.1, 126.96.36.199, 188.8.131.52, 184.108.40.206, 220.127.116.11, 9.1, 9.1.1, 18.104.22.168,
22.214.171.124, 9.5, 9.5.1
AIX, Linux, Windows, z/OS
There is a vulnerability in IBM SDK Java Technology Edition that is used by
Rational Developer for System z. This vulnerability, commonly referred to as
SLOTH, was disclosed as part of the IBM Java SDK updates in January 2016.
Subscribe to My Notifications to be notified of important product support alerts like this. Follow this link for more information (requires login with your IBM ID)
Affected Products and Versions
Principal Product and Version(s)
Rational Developer for System z, versions 126.96.36.199 and earlier Rational Developer for System z, versions 188.8.131.52 and earlier Rational Developer for System z, versions 184.108.40.206 and earlier Rational Developer for z Systems, versions 9.5.1 and earlier
IBM has provided patches for all affected versions.
Follow the installation instructions in the README files included with the
The fix can be obtained at the following locations:
Rational Developer for System z Interim Fix 7 for 8.5.x
Rational Developer for System z Interim Fix 7 for 9.0.x
Rational Developer for System z Interim Fix 7 for 9.1.x
Rational Developer for System z Interim Fix 2 for 9.5.x
Workarounds and Mitigations
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 JDK is the only solution.
Get Notified about Future Security Bulletins
to be notified of important product support alerts like this.
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.
Complete CVSS v3 Guide
On-line Calculator v3
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
* 23 February 2016: Original copy 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.
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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