FedCIRC Advisory FA-99-10
                                       
   Originally released: July 16, 1999
   Source: CERT/CC
   Revised Date: July 22, 1999
   Added link to IN-99-04 in the "Impact" section.
   
  Systems Affected
  
     * Systems running the Calendar Manager Service daemon, often named
       rpc.cmsd
       
I. Description

   A buffer overflow vulnerability has been discovered in the Calendar
   Manager Service daemon, rpc.cmsd. The rpc.cmsd daemon is frequently
   distributed with the Common Desktop Environment (CDE) and Open
   Windows.
   
II. Impact

   Remote and local users can execute arbitrary code with the privileges
   of the rpc.cmsd daemon, typically root. Under some configurations
   rpc.cmsd runs with an effective userid of daemon, while retaining root
   privileges.
   
   This vulnerability is being exploited in a significant number of
   incidents reported to the CERT/CC. An exploit script was posted to
   BUGTRAQ. For more information about attacks using various RPC services
   please see CERT® Incident Note IN-99-04
   [1]http://www.cert.org/incident_notes/IN-99-04.html
   
III. Solution

   Install a patch from your vendor
   
   Appendix A contains information provided by vendors for this advisory.
   We will update the appendix as we receive more information. If you do
   not see your vendor's name, the CERT/CC did not hear from that vendor.
   Please contact your vendor directly.
   
   We will update this advisory as more information becomes available.
   Please check the CERT/CC Web site for the most current revision.
   
   Disable the rpc.cmsd daemon
   
   If you are unable to apply patches to correct this vulnerability, you
   may wish to disable the rpc.cmsd daemon. If you disable rpc.cmsd, it
   may affect your ability to manage calendars.
   
  Appendix A: Vendor Information
  
   Fujitsu
   
   Fujitsu's UXP/V operating system is not vulnerable.
          
   Hewlett-Packard Company
   
   HP is vulnerable, patches in process.
          
   IBM Corporation
   
   AIX is not vulnerable to the rpc.cmsd remote buffer overflow.
          IBM and AIX are registered trademarks of International Business
          Machines Corporation.
          
   Santa Cruz Operation, Inc.
   
   SCO is investigating this problem. The following SCO product contains
          CDE and is potentially vulnerable:
          
          + SCO UnixWare 7
            
          The following SCO products do not contain CDE, and are
          therefore believed not to be vulnerable:
          
          + SCO UnixWare 2.1
          + SCO OpenServer 5
          + SCO Open Server 3.0
          + SCO CMW+
            
          SCO will provide further information and patches if necessary
          as soon as possible at [2]http://www.sco.com/security.
          
   Silicon Graphics, Inc.
   
   IRIX does not have dtcm or rpc.cmsd and therefore is NOT vulnerable.
          
          UNICOS does not have dtcm or rpc.cmsd and therefore is NOT
          vulnerable.
          
   Sun Microsystems, Inc.
   
   The following patches are available:
          OpenWindows:
          
    SunOS version     Patch ID
    _____________     _________
    SunOS 5.5.1       104976-04
    SunOS 5.5.1_x86   105124-03
    SunOS 5.5         103251-09
    SunOS 5.5_x86     103273-07
    SunOS 5.3         101513-14
    SunOS 4.1.4       100523-25
    SunOS 4.1.3_U1    100523-25

          CDE:
          
    CDE version       Patch ID
    ___________       ________
    1.3               107022-03
    1.3_x86           107023-03
    1.2               105566-07
    1.2_x86           105567-08

          Patches for SunOS 5.4 and CDE 1.0.2 and 1.0.1 will be available
          within a week of the release of this advisory.
          
          Sun security patches are available at:
          
          [3]http://sunsolve.sun.com/pub-cgi/show.pl?target=patches/patch
          -license&nav=pubpatches
     _________________________________________________________________
   
   The CERT Coordination Center would like to thank Chok Poh of Sun
   Microsystems, David Brumley of Stanford University, and Elias Levy of
   Security Focus for their assistance in preparing this advisory.
   ______________________________________________________________________
   
   This document is available from:
   [4]http://www2.fedcirc.gov/advisories/FA-99-10.html
   ______________________________________________________________________
   
FedCIRC Contact Information

   Email: [5]fedcirc@fedcirc.gov
          Phone: +1 888-282-0870 (24-hour toll-free hotline)
          Phone: +1 412-268-6321 (24-hour hotline)
          Fax: +1 412-268-6989
          Postal address:
          FedCIRC CERT Coordination Center
          Software Engineering Institute
          Carnegie Mellon University
          Pittsburgh PA 15213-3890
          U.S.A.
          
   FedCIRC personnel answer the hotline 08:00-20:00 EST(GMT-5) /
   EDT(GMT-4) Monday through Friday; they are on call for emergencies
   during other hours, on U.S. holidays, and on weekends.
   
    Using encryption
    
   We strongly urge you to encrypt sensitive information sent by email.
   Our public PGP key is available from
   
   [6]http://www2.fedcirc.gov/keys.html
       
   If you prefer to use DES, please call the FedCIRC hotline for more
   information.
   
    Getting security information
    
   FedCIRC publications and other security information are available from
   our web site
   
   [7]http://www.fedcirc.gov/
       
   FedCIRC (Federal Computer Incident Response Capability) is operated by
   the CERT/CC for the U.S. General Services Administration. FedCIRC
   provides security services to U.S. Federal civilian agencies.
   
   Copyright 1999 Carnegie Mellon University.
   Conditions for use, disclaimers, and sponsorship information can be
   found in
   
   [8]http://www.cert.org/legal_stuff.html
       
   * "CERT" and "CERT Coordination Center" are registered in the U.S.
   Patent and Trademark Office.
   ______________________________________________________________________
   
   NO WARRANTY
   Any material furnished by Carnegie Mellon University and the Software
   Engineering Institute is furnished on an "as is" basis. Carnegie
   Mellon University makes no warranties of any kind, either expressed or
   implied as to any matter including, but not limited to, warranty of
   fitness for a particular purpose or merchantability, exclusivity or
   results obtained from use of the material. Carnegie Mellon University
   does not make any warranty of any kind with respect to freedom from
   patent, trademark, or copyright infringement.
   
   Revision History
July 22, 1999  Added link to IN-99-04 in the "Impact" section
July 20, 1999  Updated the advisory title
July 16, 1999  Initial release

References

   1. http://www.cert.org/incident_notes/IN-99-04.html
   2. http://www.sco.com/security
   3. http://sunsolve.sun.com/pub-cgi/show.pl?target=patches/patch-license&nav=pubpatches
   4. http://www2.fedcirc.gov/advisories/FA-99-10.html
   5. mailto:fedcirc@fedcirc.gov
   6. http://www2.fedcirc.gov/keys.html
   7. http://www.fedcirc.gov/
   8. http://www.cert.org/legal_stuff.html