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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

VRMFAPARRemediation/First Fix
Cast Iron Appliance7.5.*LI78920 iFix 7.5.0.1-CUMUIFIX-003
Cast Iron Appliance7..0*LI78920iFix 7.0.0.2-CUMUIFIX-025
Cast Iron Appliance6.4.0.xLI78920iFix 6.4.0.1-CUMUIFIX-035
Cast Iron Appliance6.3.0.xLI78920iFix 6.3.0.2-CUMUIFIX-019
Cast Iron Appliance6.1.0.xLI78920iFix 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.

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References

Off

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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Document Information

Modified date:
15 June 2018

UID

swg21977301