Security Bulletin: Multiple vulnerabilities in IBM Java Runtime affect IBM SPSS Analytic Server (CVE-2015-4872, CVE-2015-4734 , CVE-2015-5006, CVE-2015-7575)

Security Bulletin

Summary

There are multiple vulnerabilities in IBM® Runtime Environment Java™ Technology Edition, Versions 1.6 and 1.7 that is used by IBM SPSS Analytic Server. These issues were disclosed as part of the IBM Java SDK updates in October 2015 and includes the vulnerability commonly referred to as “SLOTH”.

Vulnerability Details

CVEID: CVE-2015-4872
DESCRIPTION: An unspecified vulnerability in Oracle Java SE and JRockit related to the Security component has no confidentiality impact, partial integrity impact, and no availability impact.
CVSS Base Score: 5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/107361 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVEID: CVE-2015-4734
DESCRIPTION: An unspecified vulnerability in Oracle Java SE related to the JGSS component could allow a remote attacker to obtain sensitive information.
CVSS Base Score: 5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/107356 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVEID: CVE-2015-5006
DESCRIPTION: IBM Java Security Components could allow an attacker with physical access to the system to obtain sensitive information from the Kerberos Credential Cache.
CVSS Base Score: 4.6
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/106309 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

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/UI:U/C:H/I:L/A:N)

Affected Products and Versions

IBM SPSS Analytic Server 1.0.1.0
IBM SPSS Analytic Server 2.0.0.0

Remediation/Fixes

Product	VRMF	Remediation/First Fix
SPSS Analytic Server	1.0.1.0	http://www-01.ibm.com/support/docview.wss?uid=swg24041780
SPSS Analytic Server	2.0.0.0	http://www-01.ibm.com/support/docview.wss?uid=swg24041781

You should verify applying this fix does not cause any compatibility issue in your environment.

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.

Workarounds and Mitigations

For CVE-2015-7575:

Users of Java 7 and later (SPSS Analytic Server 2.0.0.0) 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 (SPSS Analytic Server 1.0.1.0) 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

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

Off

IBM Java SDK Security Bulletin

Acknowledgement

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

Change History

22 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.

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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Tips

Security Bulletin: Multiple vulnerabilities in IBM Java Runtime affect IBM SPSS Analytic Server (CVE-2015-4872, CVE-2015-4734 , CVE-2015-5006, CVE-2015-7575)