ESB-2019.0034 - [Linux] IBM Platform Symphony: Provide misleading information - Remote with user interaction 2019-01-02

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0034
         Security Bulletin: Vulnerability in Apache Tomcat affects
                           IBM Platform Symphony
                              2 January 2019

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM Platform Symphony
Publisher:         IBM
Operating System:  Linux variants
Impact/Access:     Provide Misleading Information -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-11784  

Reference:         ESB-2018.2992

Original Bulletin: 
   https://www.ibm.com/support/docview.wss?uid=ibm10792795

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Security Bulletin: Vulnerability in Apache Tomcat affects IBM Platform Symphony

Security Bulletin

Document information

More support for: Platform Symphony

Software version: 7.1 Fix Pack 1

Operating system(s): Linux

Reference #: 07927951

Modified date: 26 December 2018

Summary

This interim fix provides instructions on upgrading Apache Tomcat from v6.0.43
to v8.5.37 in IBM Platform Symphony 7.1 Fix Pack 1 in order to address security
vulnerability CVE-2018-11784 in Apache Tomcat.

Vulnerability Details

CVE-ID: CVE-2018-11784
Description: Apache Tomcat could allow a remote attacker to conduct phishing
attacks, caused by an open redirect vulnerability in the default servlet. An
attacker could exploit this vulnerability using a specially-crafted URL to
redirect a victim to arbitrary Web sites.
CVSS Base Score: 7.4
CVSS Temporal Score: https://exchange.xforce.ibmcloud.com/vulnerabilities/
150860 for more information
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N)

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                     |P102834    |sym7.1_lnx26-lib23-x64_build509541.tar.gz                        |
+---------------------------------------------------------+-----------+-----------------------------------------------------------------+
|Apache Tomcat 8.5.37                                     |N/A        |apache-tomcat-8.5.37.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/cshrc.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-8.5.37.tar.gz package to a temporary folder and
    decompress the file:
    > cp apache-tomcat-8.5.37.tar.gz /tmp
    > tar zxvf apache-tomcat-8.5.37.tar.gz
    > rm -rf apache-tomcat-8.5.37/conf/
    > rm -rf apache-tomcat-8.5.37/work/
    > rm -rf apache-tomcat-8.5.37/logs/

 4. Copy the Tomcat folder:
    > rm -rf $EGO_TOP/gui/3.1/tomcat
    > cp -rf apache-tomcat-8.5.37 $EGO_TOP/gui/3.1/tomcat

 5. Copy the sym7.1_lnx26-lib23-x64_build509541.tar.gz package and decompress
    it:
    > tar zxfo sym7.1_lnx26-lib23-x64_build509541.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/cshrc.platform
    > egosh service start WEBGUI

12. In the $EGO_TOP/gui/logs/catalina.out file, check whether the GUI version
    indicates version 8.5.37:
    INFO: Server version:        Apache Tomcat/8.5.37

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/cshrc.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/cshrc.platform
    > egosh service start WEBGUI

Workarounds and Mitigations

None


Acknowledgement

None

Change History

24 December 2018: 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.

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