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AUSCERT External Security Bulletin Redistribution
Security Bulletin: Vulnerability in IBM Java Runtime affect
Rational Host On-Demand (CVE-2015-7575)
23 February 2016
AusCERT Security Bulletin Summary
Product: IBM Rational Host On-Demand
Operating System: Linux variants
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 Runtime affect Rational Host On-
More support for:
Rational Host On-Demand
11.0, 220.127.116.11, 18.104.22.168, 22.214.171.124, 126.96.36.199, 188.8.131.52, 184.108.40.206, 11.0.6,
220.127.116.11, 11.0.7, 11.0.8, 11.0.9, 11.0.10, 11.0.11, 11.0.12, 11.0.13, 11.0.14
There is a vulnerability in IBM Runtime Environment Java Technology Edition,
Version 1.7SR6 that is used by IBM Rational Host On-Demand This
vulnerability, commonly referred to as SLOTH, was disclosed as part of the
IBM Java SDK updates in January 2016.
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
CVSS Base Score: 7.1
CVSS Temporal Score: See
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
Host On-Demand 11.0.14 and earlier
User need to upgrade to 11.0.14 Special Build-2
Workarounds and Mitigations
Users of Java 7 and later (eg Using Host On Demand 11.0.9 11.0.14) can
address the issue by updating the Server JRE /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
Get Notified about Future Security Bulletins
to be notified of important product support alerts like this.
Complete CVSS v3 Guide
On-line Calculator v3
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
IBM Java SDK Security Bulletin
CVE-2015-7575 was reported to IBM by Karthikeyan Bhargavan at INRIA in Paris,
19 Feb 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.
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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