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>>                                                      CERT-NL, 01-Mar-2000 <<
>> All CERT-NL information has been moved to http://cert.surfnet.nl.  Links  <<
>> to CERT-NL information contained in this advisory are therefore outdated. <<
>>                                                                           <<
>> CERT-NL also has stopped the CERT-CC-Mirror service.  Due to this the     <<
>> links to the CERT-CC mirror are obsolete. Visit the CERT-CC site for the  <<
>> complete CERT-CC advisory texts:                     http://www.cert.org  <<
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Security Advisory                                                       CERT-NL
===============================================================================
Author/Source : CERT-NL                                     Index  :    S-92-17
Distribution  : SURFnet Constituency                        Page   :          1
Classification: External                                    Version:      final
Subject       : Novell Access Rights Vulnerability      Date   :  23-sep-92
===============================================================================

CERT-NL (SURFnet Computer Emergency Response Team) has received
information concerning a security problem in Novell NetWare regarding
Access Rights. This security problem is present in NetWare 386, but
other versions of Novell NetWare are apparently vulnerable as well.

* DESCRIPTION

  Novell NetWare 386 is vulnerable on Access Rights, which can be gained by
  any other user. This vulnerability probably affects all versions of
  Novell NetWare.

* IMPACT

  The impact of the problem lies in the fact that every Novell user,
  equipped with a special program, is able to gain the Access Rights of
  any other user on the attached Novell server, including the
  Supervisor.


* SOLUTION

  Up till now no fix exists to this vulnerability. The problem is however
  known to Novell HQ in Provo, Utah, who are working on the problem. As
  soon as the fix is available, the information about obtaining the fix
  will be published in a CERT-NL Security Bulletin.
  CERT-NL advises all Novell system managers:
  - not to log on as Supervisor equivalent user, when there are other users
    on the file server.
  - to remove the "Access Control Right" from all users (this right is
    necessary to change trustees, and is often handed out to "normal
    users", who do not need this right to run applications).
  - to install "showevnt.nlm" in order to be able to monitor changes in
    network Rights (by means of "showevnt.nlm" the system manager is able
    detect changes in trustees). The program "showevnt.nlm" is available
    from the anonymous FTP-server of SURFnet, called ftp.nic.surfnet.nl 
    [192.87.46.2] in the directory "netman/cert-nl/novell". Currently the
    following files are in this directory:
    showevnt.nlm - the NLM itself                             (6538 bytes)
    showevnt.doc - manual page of the NLM                     (4125 bytes)
    showevnt.txt - README file                                ( 286 bytes)
    showevnt.zip - ZIP file, containing the three files above (6050 bytes)
    Please read the "showevnt.doc" file carefully before installing the
    NLM.


CERT-NL wishes to thank Bart Mellink of Cyco Automation for providing the
"showevnt.nlm" and putting it in the Public Domain. CERT-NL wishes to
thank Novell Benelux for the good cooperation.

==============================================================================
CERT-NL is the Computer Emergency Response Team for SURFnet customers. SURFnet
is the Dutch network for educational, research and related institutes. CERT-NL
is a member of the Forum of Incident Response and Security Teams (FIRST).

All CERT-NL material is available under:
  http://cert.surfnet.nl/

In case of computer or network security problems please contact your local
CERT/security-team or CERT-NL  (if your institute is NOT a SURFnet customer
please address the appropriate (local) CERT/security-team).

CERT-NL is one/two hour(s) ahead of UTC (GMT) in winter/summer,
i.e. UTC+0100 in winter and UTC+0200 in summer (DST).

   Email:     cert-nl@surfnet.nl     ATTENDED REGULARLY ALL DAYS
   Phone:     +31 302 305 305        BUSINESS HOURS ONLY
   Fax:       +31 302 305 329        BUSINESS HOURS ONLY
   Snailmail: SURFnet bv
              Attn. CERT-NL
              P.O. Box 19035
              NL - 3501 DA  UTRECHT
              The Netherlands

NOODGEVALLEN:    06 22 92 35 64      ALTIJD BEREIKBAAR
EMERGENCIES : +31 6 22 92 35 64      ATTENDED AT ALL TIMES
CERT-NL'S EMERGENCY PHONENUMBER IS ONLY TO BE USED IN CASE OF EMERGENCIES:
THE SURFNET HELPDESK OPERATING THE EMERGENCY NUMBER HAS A *FIXED*
PROCEDURE FOR DEALING WITH YOUR ALERT AND WILL IN REGULAR CASES RELAY IT
TO CERT-NL IN AN APPROPRIATE MANNER. CERT-NL WILL THEN CONTACT YOU.
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