TUCoPS :: Unix :: General :: ca-9908.txt

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CERT Advisory CA-99-08 Buffer Overflow Vulnerability in Calendar Manager
Service Daemon, rpc.cmsd
 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ョ Incident Note IN-99-04
 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 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:
 
 http://sunsolve.sun.com/pub-cgi/show.pl?target=patches/patch-li
 cense&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:
 http://www.cert.org/advisories/CA-99-08-cmsd.html.
 ______________________________________________________________________
 
CERT/CC Contact Information
 Email: cert@cert.org
 Phone: +1 412-268-7090 (24-hour hotline)
 Fax: +1 412-268-6989
 Postal address:
 CERT Coordination Center
 Software Engineering Institute
 Carnegie Mellon University
 Pittsburgh PA 15213-3890
 U.S.A.
 
 CERT 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 http://www.cert.org/CERT_PGP.key.
 If you prefer to use DES, please call the CERT hotline for more
 information.
 
Getting security information
 CERT publications and other security information are available from
 our web site http://www.cert.org/.
 
 To be added to our mailing list for advisories and bulletins, send
 email to cert-advisory-request@cert.org and include SUBSCRIBE
 your-email-address in the subject of your message.
 
 Copyright 1999 Carnegie Mellon University.
 Conditions for use, disclaimers, and sponsorship information can be
 found in 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
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