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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.0454 Security Bulletin: Multiple vulnerabilities in IBM Java Runtime affect IBM Sterling Secure Proxy (CVE-2015-7575, CVE-2016-0475, CVE-2015-4872, CVE-2015-5006) 23 February 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM Sterling Secure Proxy Publisher: IBM Operating System: AIX HP-UX Linux variants Solaris Windows Impact/Access: Access Privileged Data -- Remote with User Interaction Modify Arbitrary Files -- Remote/Unauthenticated Provide Misleading Information -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2016-0475 CVE-2015-7575 CVE-2015-5006 CVE-2015-4872 Reference: ASB-2016.0004 ASB-2015.0103 ESB-2015.2661 ESB-2015.2660 Original Bulletin: http://www-01.ibm.com/support/docview.wss?uid=swg21977045 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: Multiple vulnerabilities in IBM Java Runtime affect IBM Sterling Secure Proxy (CVE-2015-7575, CVE-2016-0475, CVE-2015-4872, CVE-2015-5006) Security Bulletin Document information More support for: Sterling Secure Proxy Software version: 3.3.1, 3.4, 3.4.1, 3.4.2 Operating system(s): AIX, HP-UX, Linux, Solaris, Windows Reference #: 1977045 Modified date: 2016-02-22 Summary There are multiple vulnerabilities in IBM Runtime Environment Java Technology Edition, Version 7.0 that is used by IBM Sterling Secure Proxy. These issues were disclosed as part of the IBM Java Runtime updates in October 2015 and January 2016 and include 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. 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-2016-0475 DESCRIPTION: An unspecified vulnerability in Oracle Java SE Java SE Embedded and Jrockit related to the Libraries component has partial confidentiality impact, partial integrity impact, and no availability impact. CVSS Base Score: 5.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109946 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:N) 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-2015-5006 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) Affected Products and Versions IBM Sterling Secure Proxy 3.4.2 through 3.4.2.0 iFix 6 IBM Sterling Secure Proxy 3.4.1 through 3.4.1.8 iFix 9 * IBM Sterling Secure Proxy 3.4.0 through 3.4.0.6 iFix 6 * IBM Sterling Secure Proxy 3.3.01 through 3.3.1.23 iFix 7 * * Note: Releases marked with *will reach End of Support on 30 April 2016. Remediation/Fixes Apply the following fixes to upgrade the Java Runtime Environment. Note: Before applying the new JRE, review your configuration to ensure you do not use any ciphers with MD5 or certificates with an MD5 signature. These ciphers and certificates will fail using the updated JRE. Product VRMF APAR Remediation/First Fix IBM Sterling Secure Proxy 3.4.2.0 IT13805 Fix Central IBM Sterling Secure Proxy 3.4.1.8 IT13805 Fix Central IBM Sterling Secure Proxy 3.4.0.6 IT13805 Fix Central IBM Sterling Secure Proxy 3.3.1.23 IT13805 Contact Support and request the fix package be published for you on the ECuRep server. Workarounds and Mitigations For CVE-2015-7575 (SLOTH MD5): 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 - For example: jdk.certpath.disabledAlgorithms=MD2, RSA keySize < 1024,MD5 Add MD5withRSA to the jdk.tls.disabledAlgorithms property - for example: jdk.tls.disabledAlgorithms=SSLv3, RC4, DH keySize < 768,MD5withRSA Get Notified about Future Security Bulletins Subscribe to My Notifications to be notified of important product support alerts like this. Important note IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk. References Complete CVSS v2 Guide On-line Calculator v2 Complete CVSS v3 Guide On-line Calculator v3 IBM Java SDK Security Bulletin January 2016 IBM Java SDK security bulletin October 2015 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 22 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. - --------------------------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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