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CERT Advisory CA-99-16 Buffer Overflow in Sun Solstice AdminSuite Daemon sadmind
From: aleph1 () SECURITYFOCUS COM (Elias Levy)
Date: Tue, 14 Dec 1999 21:00:57 -0800


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CERT Advisory CA-99-16 Buffer Overflow in Sun Solstice AdminSuite Daemon
sadmind

   Original release date: December 14, 1999
   Last revised: --
   Source: CERT/CC

   A complete revision history is at the end of this file.

Systems Affected

     * Systems that have sadmind installed

I. Description

   The sadmind program is installed by default in Solaris 2.5, 2.6, and
   7. In Solaris 2.3 and 2.4, sadmind may be installed if the Sun
   Solstice Adminsuite packages are installed. The sadmind program is
   installed in /usr/sbin. It can be used to coordinate distributed
   system administration operations remotely. The sadmind daemon is
   started automatically by the inetd daemon whenever a request to
   perform a system administration operation is received.

   All versions of sadmind are vulnerable to a buffer overflow that can
   overwrite the stack pointer within a running sadmind process. Since
   sadmind is installed as root, it is possible to execute arbitrary
   code with root privileges on a remote machine.

   This vulnerability has been discussed in public security forums and is
   actively being exploited by intruders.

II. Impact

   A remote user may be able to execute arbitrary code with root
   privileges on systems running vulnerable versions of sadmind.

III. Solution

Disable sadmind

   Remove (or comment) the following line in /etc/inetd.conf:

   100232/10 tli rpc/udp wait root /usr/sbin/sadmind sadmind

   Even though it will not defend against the attack discussed in this
   advisory, it is a good practice to set the security option used to
   authenticate requests to a STRONG level, for example:

   100232/10 tli rpc/udp wait root /usr/sbin/sadmind sadmind -S 2

   If you must use sadmind to perform system administration tasks, we
   urge you to use this setting.

   Appendix A contains information provided by vendors for this advisory.
   We will update the appendix as we receive or develop more information.
   If you do not see your vendor's name in Appendix A, the CERT/CC did
   not hear from that vendor. Please contact your vendor directly.

Appendix A. Vendor Information

Sun Microsystems

   Sun Microsystems is currently working on patches to address the issue
   discussed in this advisory and recommends disabling sadmind.
     _________________________________________________________________

   The CERT Coordination Center thanks Sun Microsystems for its help in
   providing information for this advisory.
   ______________________________________________________________________

   This document is available from:
   http://www.cert.org/advisories/CA-99-16-sadmind.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

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   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
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Getting security information

   CERT publications and other security information are available from
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   http://www.cert.org/

   To be added to our mailing list for advisories and bulletins, send
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   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
December 14, 1999:  Initial release

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