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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.1958 Security Bulletin: Vulnerability in Apache Tomcat affects IBM Platform Symphony 31 May 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM Platform Symphony Publisher: IBM Operating System: Linux variants Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-0199 Reference: ESB-2019.0980 Original Bulletin: http://www.ibm.com/support/docview.wss?uid=ibm10885114 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: Vulnerability in Apache Tomcat affects IBM Platform Symphony Document information More support for: Platform Symphony Software version: 7.1 Fix Pack 1 Operating system(s): Linux Reference #: 0885114 Modified date: 30 May 2019 Summary This interim fix provides instructions on upgrading Apache Tomcat from v6.0.43 to v8.5.41 in IBM Platform Symphony 7.1 Fix Pack 1 in order to address security vulnerability CVE-2019-0199 in Apache Tomcat. Vulnerability Details CVE-ID: CVE-2019-0199 Description: Apache Tomcat is vulnerable to a denial of service, caused by the acceptance of streams with excessive numbers of SETTINGS frames and the permitting of clients to keep streams open without reading/writing request data by the HTTP/2 implementation. By sending excessive SETTINGS frames, a remote attacker could exploit this vulnerability to cause a denial of service. CVSS Base Score: 7.5 CVSS Temporal Score: https://exchange.xforce.ibmcloud.com/vulnerabilities/ 158637 for more information CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) Affected Products and Versions Platform Symphony 7.1 Fix Pack 1 Remediation/Fixes Applicability Operating systems: Linux-x86_64 Cluster type: Single grid cluster Packages +---------------------------------------------------------+-----------+-----------------------------------------------------------------+ | Product | APAR | Remediation/First Fix | +---------------------------------------------------------+-----------+-----------------------------------------------------------------+ |IBM Platform Symphony 7.1 Fix Pack 1 |P103017 |sym7.1_lnx26-lib23-x64_build521013.tar.gz | +---------------------------------------------------------+-----------+-----------------------------------------------------------------+ |Apache Tomcat 8.5.41 |N/A |apache-tomcat-8.5.41.tar.gz | +---------------------------------------------------------+-----------+-----------------------------------------------------------------+ For Platform Symphony 7.1 Fix Pack 1 Installation 1. Log on to the master host as the cluster administrator and stop the WEBGUI service: > egosh user logon -u Admin -x Admin > source $EGO_TOP/profile.platform > egosh service stop WEBGUI 2. Log on to each management host in the cluster and back up the following files for recovery purposes: $EGO_TOP/gui/3.1/tomcat/ $EGO_CONFDIR/../../gui/conf/catalina.policy $EGO_CONFDIR/../../gui/conf/catalina.properties $EGO_CONFDIR/../../gui/conf/server.xml$EGO_TOP/gui/ego/3.1/platform/ WEB-INF/web.xml $EGO_TOP/gui/is/7.1/isgui/WEB-INF/web.xml $EGO_TOP/gui/perf/3.1/perfgui/WEB-INF/web.xml $EGO_TOP/gui/soam/7.1/soamgui/WEB-INF/web.xml $EGO_TOP/gui/soam/7.1/symgui/WEB-INF/web.xml 3. Copy the apache-tomcat-8.5.41.tar.gz package to a temporary folder and decompress the file: > cp apache-tomcat-8.5.41.tar.gz /tmp > tar zxvf apache-tomcat-8.5.41.tar.gz > rm -rf apache-tomcat-8.5.41/conf/ > rm -rf apache-tomcat-8.5.41/work/ > rm -rf apache-tomcat-8.5.41/logs/ 4. Copy the Tomcat folder: > rm -rf $EGO_TOP/gui/3.1/tomcat > cp -rf apache-tomcat-8.5.41 $EGO_TOP/gui/3.1/tomcat 5. Copy the sym7.1_lnx26-lib23-x64_build521013.tar.gz package and decompress it: > tar zxfo sym7.1_lnx26-lib23-x64_build521013.tar.gz -C $EGO_TOP 6. If you ran the "egoconfig mghost shared_dir" command during installation to set up a shared location for configuration files, ensure that the configuration file is changed in the shared directory: > cp $EGO_TOP/gui/conf/catalina.policy $EGO_CONFDIR/../../gui/conf/ catalina.policy > cp $EGO_TOP/gui/conf/catalina.properties $EGO_CONFDIR/../../gui/conf/ catalina.properties > cp $EGO_TOP/gui/conf/server.xml $EGO_CONFDIR/../../gui/conf/server.xml 7. If you modified the $EGO_CONFDIR/../../gui/conf/server.xml configuration file for details such as the GUI service port, manually redo those changes. 8. Edit the web.xml files to add the following configuration: 1. Edit each of the following files: $EGO_TOP/gui/ego/3.1/platform/WEB-INF/web.xml $EGO_TOP/gui/is/7.1/isgui/WEB-INF/web.xml $EGO_TOP/gui/perf/3.1/perfgui/WEB-INF/web.xml $EGO_TOP/gui/soam/7.1/symgui/WEB-INF/web.xml $EGO_TOP/gui/soam/7.1/soamgui/WEB-INF/web.xml 2. Find the "<servlet-name>dwr-invoker</servlet-name>" line in the "</ servlet>" section and add the following configuration: <init-param> <param-name>crossDomainSessionSecurity</param-name> <param-value>false</param-value> </init-param> For example: <servlet> <servlet-name>dwr-invoker</servlet-name> <servlet-class>org.directwebremoting.servlet.DwrServlet</ servlet-class> <init-param> <param-name>debug</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>crossDomainSessionSecurity</param-name> <param-value>false</param-value> </init-param> </servlet> 9. On each management host, delete all subdirectories and files in the following directory: > rm -rf $EGO_TOP/gui/work/* 10. On all client hosts, open your web browser and clear the browser cache. 11. Start the WEBGUI service: > source $EGO_TOP/profile.platform > egosh service start WEBGUI 12. In the $EGO_TOP/gui/logs/catalina.out file, check whether the GUI version indicates version 8.5.41: INFO: Server version: Apache Tomcat/8.5.41 Uninstallation Follow the instructions in this section to uninstall this update in your cluster, if required. 1. Log on to the master host as the cluster administrator and stop the WEBGUI service: > egosh user logon -u Admin -x Admin > source $EGO_TOP/profile.platform > egosh service stop WEBGUI 2. On each management host, restore the backup files: 1. Remove the Tomcat folder, which was introduced by this interim fix: > rm -rf $EGO_TOP/gui/3.1/tomcat 2. Restore the following folders and files from your backup: $EGO_TOP/gui/3.1/tomcat $EGO_CONFDIR/../../gui/conf/catalina.policy $EGO_CONFDIR/../../gui/conf/catalina.properties $EGO_CONFDIR/../../gui/conf/server.xml $EGO_TOP/gui/ego/3.1/platform/WEB-INF/web.xml $EGO_TOP/gui/is/7.1/isgui/WEB-INF/web.xml $EGO_TOP/gui/perf/3.1/perfgui/WEB-INF/web.xml $EGO_TOP/gui/soam/7.1/soamgui/WEB-INF/web.xml $EGO_TOP/gui/soam/7.1/symgui/WEB-INF/web.xml 3. Delete all subdirectories and files in the following directory: > rm -rf $EGO_TOP/gui/work/* 4. On all client hosts, open your web browser and clear the browser cache. 5. Start the WEBGUI service: > source $EGO_TOP/profile.platform > egosh service start WEBGUI Workarounds and Mitigations None Change History 21 May 2019: 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. 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