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Security Bulletin: Multiple vulnerabilities in IBM Java SDK affect WebSphere Cast Iron (CVE-2015-7575, CVE-2016-0448)

Security Bulletin


Summary

There are multiple vulnerabilities in IBM® SDK Java™ Technology Edition, Version JAVA 7 SR9 (and earlier) AND JAVA 6 SR16 (and earlier) that is used by WebSphere Cast Iron. These issues were disclosed as part of the IBM Java SDK updates in January 2016 and includes the vulnerability commonly referred to as “SLOTH”.

Vulnerability Details

CVEID: CVE-2015-7575
DESCRIPTION: 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 “SLOTH”.
CVSS Base Score: 7.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109415 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N)

CVEID: CVE-2016-0448
DESCRIPTION: An unspecified vulnerability in Oracle Java SE and Java SE Embedded related to the JMX component could allow a remote attacker to obtain sensitive information resulting in a partial confidentiality impact using unknown attack vectors.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109949 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:S/C:P/I:N/A:N)

Affected Products and Versions

WebSphere Cast Iron v 7.5.0.x,

WebSphere Cast Iron v 7.0.0.x,
WebSphere Cast Iron v 6.4.0.x
WebSphere Cast Iron v 6.3.0.x
WebSphere Cast Iron v 6.1.0.x

Remediation/Fixes

Product VRMF APAR Remediation/First Fix
Cast Iron Appliance 7.5.* LI78920 iFix 7.5.0.1-CUMUIFIX-003
Cast Iron Appliance 7..0* LI78920 iFix 7.0.0.2-CUMUIFIX-025
Cast Iron Appliance 6.4.0.x LI78920 iFix 6.4.0.1-CUMUIFIX-035
Cast Iron Appliance 6.3.0.x LI78920 iFix 6.3.0.2-CUMUIFIX-019
Cast Iron Appliance 6.1.0.x LI78920 iFix 6.1.0.15-CUMUIFIX-025

Workarounds and Mitigations

For CVE-2015-7575:

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

References

Complete CVSS v2 Guide
On-line Calculator v2
Complete CVSS v3 Guide
On-line Calculator v3

Related information

Acknowledgement

CVE-2015-7575 was reported to IBM by Karthikeyan Bhargavan at INRIA in Paris, France.

Change History

<2016/02/25> : 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.

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.

Document information

More support for: WebSphere Cast Iron Cloud integration

Software version: 6.1.0.9, 6.1.0.15, 6.3, 6.3.0.1, 6.3.0.2, 6.4.0.0, 6.4.0.1, 7.0.0, 7.0.0.1, 7.0.0.2, 7.0.0.3, 7.5.0.0, 7.5.0.1

Operating system(s): Firmware, Windows

Reference #: 1977301

Modified date: 25 February 2016