TIBCO Enterprise Message Service vulnerability

   Original release date: April 9, 2008
   Last revised: --
   Source: TIBCO Software Inc.


Systems Affected

   TIBCO Enterprise Message Service (EMS) versions below 4.4.3
   TIBCO iProcess Engine versions 10.6.0 thru 10.6.1

   The following components are affected:

     * TIBCO EMS Server (tibemsd)


Overview

   The TIBCO EMS server contains buffer overflow vulnerabilities in the
   processing of inbound data.  The impact of these vulnerabilities may
   include remote execution of arbitrary code, information disclosure,
   and denial of service. 


I. Description

   TIBCO has released an update that addresses critical vulnerabilities
   in the server component of TIBCO EMS.

   The EMS server contains vulnerabilities that may allow an attacker to
   compromise the server by sending a specially crafted message to the
   EMS server via an EMS client connection or via the TIBCO Rendezvous
   Daemon.

   TIBCO strongly recommends sites running the affected component to
   install the update or take mitigating action as appropriate.


II. Impact

   The impact of these vulnerabilities varies depending on the operating
   system, configuration options of the server, and the privilege
   levels of the user that invokes the server.

   On Unix based systems, a successful exploit will allow arbitrary
   code execution with the privileges of the user that invoked the
   server.

   On Windows based systems, a successful exploit will allow
   arbitrary code execution with the privileges of the user that
   invoked the server.  If the server component is installed as a
   system service, this will result in access to system privileges.


III. Solution

   Upgrade TIBCO Enterprise Messaging Service to version 4.4.3 or
   above.  This is strongly recommended.

   If an upgrade is not possible, the following actions can mitigate
   the vulnerabilities:

     * Ensure that authorization is enabled in the EMS server and
       that all authorized users defined locally or in LDAP are fully
       trusted.
     * Utilize a firewall to restrict access to the EMS server
       port to trusted sources.
     * Disable Rendezvous support by setting "tibrv_transports"
       to "disabled" in the configuration file for the EMS server
       (tibemsd.conf).


References

   http://www.tibco.com/mk/advisory.jsp
   CVE: CVE-2008-1703, CVE-2008-1704