18 February 2016
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.0407 Security Bulletin: Vulnerability in IBM Java SDK affects IBM InfoSphere Discovery (CVE-2015-7575) 18 February 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM InfoSphere Discovery Publisher: IBM Operating System: AIX Linux variants Windows Impact/Access: Access Privileged Data -- Remote/Unauthenticated Provide Misleading Information -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2015-7575 Reference: ASB-2016.0004 ESB-2016.0401 ESB-2016.0398 ESB-2016.0386 ESB-2016.0383 ESB-2016.0055 ESB-2016.0049 ESB-2016.0047 ESB-2016.0046 Original Bulletin: http://www.ibm.com/support/docview.wss?uid=swg21976047 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: Vulnerability in IBM Java SDK affects IBM InfoSphere Discovery (CVE-2015-7575) Security Bulletin Document information More support for: InfoSphere Discovery Software version: 4.1.1, 4.5, 4.6 Operating system(s): AIX, Linux, Windows Reference #: 1976047 Modified date: 2016-02-16 Summary There is a vulnerability in IBM SDK Java Technology Edition, Version 6 that is used by IBM InfoSphere Discovery. This vulnerability, commonly referred to as SLOTH, was disclosed as part of the IBM Java SDK updates in January 2016. 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/UI:U/C:H/I:L/A:N) Affected Products and Versions IBM InfoSphere Discovery, IBM InfoSphere Discovery for Information Integration, and IBM InfoSphere Discovery for zOS, versions 4.1.1 and 4.5 on Windows, and version 4.6 running on all platforms Remediation/Fixes Product VRMF APAR Remediation/First Fix All InfoSphere Discovery products 4.6 IT13447 --Apply IT13447 All InfoSphere Discovery products 4.5 IT13447 --Upgrade to Discovery 220.127.116.11 --Apply IT13447 All InfoSphere Discovery products 4.1.1 IT13447 --Upgrade to Discovery 18.104.22.168 --Apply IT13447 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 Subscribe to My Notifications to be notified of important product support alerts like this. References Complete CVSS v3 Guide On-line Calculator v3 IBM Java SDK Security Bulletin Related information IBM Secure Engineering Web Portal IBM Product Security Incident Response Blog Acknowledgement CVE-2015-7575 was reported to IBM by Karthikeyan Bhargavan at INRIA in Paris, France Change History 16 February 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 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. Segment Product Component Platform Version Edition Information Management InfoSphere Discovery Windows, AIX, Linux 4.6, 4.5, 4.1.1 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. 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