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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 to CERT-NL information contained in this advisory are therefore outdated.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 (Don Stikvoort)                     Index  :    S-94-12
Distribution  : World                                       Page   :          1
Classification: External                                    Version:      Final
Subject       : SUN Solaris 2.3 "automountd" vulnerability  Date   :  11-May-94
===============================================================================

By courtesy of SUN Microsystems CERT-NL received information about a 
vulnerability in "automountd" on SUN systems running Solaris 2.3 which 
can lead to unauthorized root access. 

Below problem and solution are described. If this applies to your 
situation we advise to install the patch involved.

(The text below is a slightly abridged version of Sun's bulletin #00127a 
of 5 May 1994, which itself is a corrected version of #00127 - not 
previously sent out by CERT-NL)

===============================================================================


BULLETIN TOPICS
    
I.   Announcement of patch for Solaris 2.3 "automountd" vulnerability

II.  Patch Table

III. Checksum Table


APPENDICES

A.   How to obtain Sun security patches

B.   How to report or inquire about Sun security problems

C.   How to obtain Sun security bulletins
 
                                -----------

I.  Announcement of patches for Solaris 2.3 "automountd" vulnerability

    Patch 101329-15 fixes a bug in the Solaris 2.3 version of automountd
    which allows a user with an unprivileged account on a 2.3 system to
    gain root access.

    No reports of this vulnerability being exploited have yet come to the
    attention of this office. We nevertheless recommend that all affected
    customers close this very serious security hole.

    The automountd fix is bundled into the Solaris 2.3 jumbo NIS+ patch.
    The first version of the patch to contain the security fix was
    101329-10; but we recommend the installation of the latest version
    (currently 101329-15).

    This bug is not found in any other SunOS version, including Solaris x86.
    The fix has been integrated into the upcoming Solaris 2.4 release.


II. Patch Table

    In the patch table we show the patch number and file name for 
    the compressed tar file containing the NIS+ jumbo patch.
     
    Software    Patch ID    Patch File Name
    --------    ---------   --------------- 
    NIS+        101329-15   101329-15.tar.Z


III. Checksum Table

    In the checksum table we show the BSD and SVR4 checksums and MD5
    digital signatures for the compressed tar archive, which contains
    the entire patch package.

    File            BSD        SVR4        MD5
    Name            Checksum   Checksum    Digital Signature
    --------------- ---------  ----------  --------------------------------
    101329-15.tar.Z 55492 843  46189 1685  19AA042484727A5DE9CB21199858071A


    The checksums shown above are from the BSD-based checksum
    (on 4.1.x, /bin/sum;  on Solaris 2.x, /usr/ucb/sum) and from
    the SVR4 version on Solaris 2.x (/usr/bin/sum).


APPENDICES

A.  How to obtain Sun security patches

    1. If you have a support contract

    Customers with Sun support contracts can obtain the patches listed
    here--and all other Sun security patches--from:

       - Local Sun answer centers, worldwide
       - SunSolve Online

    Please refer to the bug ID and patch ID when requesting patches
    from Sun answer centers.

    You should also contact your answer center if you have a support
    contract and:

       - You need assistance in installing a patch 
       - You need additional patches
       - You want an existing patch ported to another platform
       - You believe you have encountered a bug in a Sun patch
       - You want to know if a patch exists, or when one will be ready

    2. If you do not have a support contract

    Sun also makes its security patches available to customers who do
    not have a support contract, via anonymous ftp:

       (ftp.uu.net and ftp.eu.net)
       
       FULLY MIRRORED BY CERT-NL 
       ON            ftp.nic.surfnet.nl 
       IN DIRECTORY  surfnet/net-security/cert-nl/patches/sun-fixes
       ( FTP archive also gopherable via gopher.nic.surfnet.nl )


    3. About the checksums

    Patches announced in a Sun security bulletin are uploaded to the
    ftp sites just before the bulletin is released, and seldom
    updated.  In contrast, the "supported" patch databases are
    refreshed nightly, and will often contain newer versions of a
    patch incorporating changes which are not security-related.

    So that you can quickly verify the integrity of the patch files
    themselves, we supply checksums for the tar archives in each
    bulletin. The listed checksums should always match those on the
    ftp systems. (The rare exceptions are listed in the
    "checksums" file there.)

    Normally, the listed checksums will also match the patches on the
    SunSolve database. However, this will not be true if we have
    changed (as we sometimes do) the README file in the patch after the
    bulletin has been released.

    If would like assistance in verifying the integrity of a patch file
    please contact this office or your local answer center.


B.  How to report or inquire about Sun security problems

    If you discover a security problem with Sun software or wish to
    inquire about a possible problem, contact one or more of the
    following:

       - Your local Sun answer centers
       - Your representative computer security response team, CERT-NL 
       - This office. Address postal mail to:

         Sun Security Coordinator
         MS MPK2-04
         2550 Garcia Avenue Mountain
   View, CA 94043-1100

   Phone: 415-688-9081
         Fax:   415-688-9101
         E-mail: security-alert@Sun.COM

     We strongly recommend that you report problems to your local Answer
     Center. In some cases they will accept a report of a security bug
     even if you do not have a support contract. An additional notification
     to the security-alert alias is suggested but should not be used as your
     primary vehicle for reporting a bug.


C.   How to obtain Sun security bulletins

     1. Subscription information

     Sun Security Bulletins are available free of charge as part of
     our Customer Warning System. It is not necessary to have a Sun
     support contract in order to receive them.

     To subscribe to this bulletin series, send mail to the address
     "security-alert@Sun.COM" with the subject "subscribe CWS
     your-mail-address" and a message body containing affiliation and
     contact information. To request that your name be removed from the
     mailing list, send mail to the same address with the subject
     "unsubscribe CWS your-mail-address". Do not include other requests
     or reports in a subscription message.

     Due to the volume of subscription requests we receive, we cannot
     guarantee to acknowledge requests. Please contact this office if
     you wish to verify that your subscription request was received, or
     if you would like your bulletin delivered via postal mail or fax.

     2. Obtaining old bulletins

     Sun Security Bulletins are archived on ftp.uu.net (in the same
     directory as the patches) and on SunSolve. Please try these
     sources first before contacting this office for old bulletins.
     MIRRORED BY CERT-NL JUST LIKE THE PATCHES.

                                ------------

==============================================================================
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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