Published:
18 July 1999
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AUSCERT External Security Bulletin Redistribution
ESB-1999.094 -- CERT Advisory CA-99-08-cmsd
Vulnerability in the Calendar Manager Service daemon, rpc.cmsd
19 July 1999
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The CERT Coordination Centre has released the following advisory concerning
a buffer overflow vulnerability in the Calendar Manager Service daemon,
rpc.cmsd. This daemon is is frequently distributed with the Common Desktop
Environment (CDE) and Open Windows. This vulnerability may allow local and
remote users to 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.
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CERT Advisory CA-99-08-cmsd
Originally released: July 16, 1999
Source: CERT/CC
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.
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
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)
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Copyright 1999 Carnegie Mellon University.
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______________________________________________________________________
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Revision History
July 16, 1999: Initial release
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