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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.0643 Security Bulletin: Vulnerability in IBM Java Runtime affects Rational Publishing Engine (CVE-2015-7575) 10 March 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM Rational Publishing Engine Publisher: IBM Operating System: Linux variants Windows Impact/Access: Access Privileged Data -- Remote with User Interaction Provide Misleading Information -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2015-7575 Reference: ASB-2016.0004 ESB-2016.0607 ESB-2016.0585 ESB-2016.0574 ESB-2016.0556 ESB-2016.0551 ESB-2016.0550 ESB-2016.0539 Original Bulletin: http://www.ibm.com/support/docview.wss?uid=swg21978188 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: Vulnerability in IBM Java Runtime affects Rational Publishing Engine (CVE-2015-7575) Document information More support for: Rational Publishing Engine General Information Software version: 1.2, 1.2.0.1, 1.2.1, 1.2.1.1, 1.3, 2.0.0, 2.0.1 Operating system(s): Linux, Windows Reference #: 1978188 Modified date: 2016-03-09 Security Bulletin Summary There is a vulnerability in IBM Runtime Environment Java Technology Edition, Versions 6 and 7 that are used by Rational Publishing Engine. 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 Rational Publishing Engine 1.2.x Rational Publishing Engine 1.3.0 Rational Publishing Engine 2.0.0 Rational Publishing Engine 2.0.1 Remediation/Fixes For RPE 1.2.x: ftp://ftp.software.ibm.com/software/rational/private/RPE-KHYRXNbcDwtP/ For RPE 1.3.0, RPE 2.0.0 and RPE 2.0.1: https://www.ibm.com/software/repositorymanager/com.ibm.rational.rpe.offering/repository.xml For RPE 1.1.x IBM recommends upgrading to a fixed, supported version/release/platform of the product. 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 *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. - --------------------------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. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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