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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.1627 Multiple vulnerabilities in IBM Java Runtime affect Rational Directory Server (Tivoli) & Rational Directory Administrator 9 May 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM Rational Directory Server Publisher: IBM Operating System: Linux variants Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-12549 CVE-2018-12547 Reference: ESB-2019.1614 ESB-2019.1587 ESB-2019.1581 ESB-2019.1568 Original Bulletin: http://www.ibm.com/support/docview.wss?uid=ibm10882042 - --------------------------BEGIN INCLUDED TEXT-------------------- Multiple vulnerabilities in IBM Java Runtime affect Rational Directory Server (Tivoli) & Rational Directory Administrator Product: Rational Directory Server Component: General Information Software version: 5.2.1 Operating system(s): Linux, Windows Reference #: 0882042 Security Bulletin Summary There are multiple vulnerabilities in IBM Runtime Environment Java Version 7 and Version 8 used by Rational Directory Server (Tivoli) and Rational Directory Administrator. These issues were disclosed as part of the IBM Java SDK updates in January 2019. Upgrade the JRE in order to resolve these issues. Vulnerability Details Rational Directory Server & Rational Directory Administrator are affected by the following vulnerabilities: CVEID: CVE-2018-12549 DESCRIPTION: Eclipse OpenJ9 could allow a remote attacker to execute arbitrary code on the system, caused by the failure to omit a null check on the receiver object of an Unsafe call when accelerating it. An attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base Score: 9.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/ 157513 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) CVEID: CVE-2018-12547 DESCRIPTION: Eclipse OpenJ9 is vulnerable to a buffer overflow, caused by improper bounds checking by the jio_snprintf() and jio_vsnprintf() functions. By sending an overly long argument, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash. CVSS Base Score: 9.8 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/ 157512 for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) If you run your own Java code using the IBM Java Runtime delivered with this product, you should evaluate your code to determine whether additional Java vulnerabilities are applicable to your code. For a complete list of vulnerabilities, refer to the "IBM Java SDK Security Bulletin", located in the References section for more information. Affected Products and Versions Rational Directory Server (Tivoli) v5.2.1 iFix 13 and earlier. Rational Directory Administrator v6.0.0.2 iFix 06 and earlier. Remediation/Fixes 1. Download one of the following IBM JRE versions that contain the fixes for these vulnerabilities: o IBM Java Runtime Environment, Version 7 R1 Service Refresh 4 Fix Pack 40 o IBM Java Runtime Environment, Version 8 Service Refresh 5 Fix Pack 30 2. After downloading a fixed IBM JRE version, refer the following technote for JRE upgrade instructions: o JRE Upgrade Instructions for Rational Directory Server (Tivoli) 5.2.1 o JRE Upgrade Instructions for Rational Directory Administrator 6.0.0.x NOTE: To improve the robustness of LDAPS (secure LDAP over TLS) connections, endpoint identification algorithms have been enabled by default. There may be situations where some applications that were previously able to successfully connect to an LDAPS server may no longer be able to do so. With this LDAP update, LDAP is asking JSSE to validate the LDAP server's certificate to ensure it is compliant with hostname verification. With this change, if the server's certificate is not compliant, then exception will be thrown. In the past, LDAP did not request JSSE to perform hostname verification and a non-compliant server certificate would not have had caused an issue. In order to resolve the issue, Regenerate the RDS server certificate (tdsserverkey.kdb) so that the certificate's subject name or certificate's subject alternate name matches the RDS server hostname, by following instructions from technote: How can I generate my own 'tdsserverkey.kdb' keystore for TLSv12 communication and use it in a IBM Rational Directory Server (Tivoli) deployment After regenerating the RDS Server certificate matching with the RDS Server Hostname, use FQDN's wherever applicable. E.g. : RDA Login Screen, Creating RDS Partition and DOORS to RDS Connection. (If you have already regenerated the RDS Server certificate by following above technote, while upgrading to IBM JRE versions 7.1.4.30 or later or 8.0.5.20 or later, then no need to follow the technote again) For versions of Rational Directory Server that are earlier than version 5.2.1, and Rational Directory Administrator versions earlier than 6.0.0.2, IBM recommends upgrading to a fixed, supported version/release/platform of the product. Workarounds and Mitigations None IBM Java SDK security bulletin Change History 02 May 2019: Initial Publication Cross reference information Product Component Platform Version Edition Rational Directory General Linux, 6.0, 6.0.0.1, Administrator Information Windows 6.0.0.2 - --------------------------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. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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