-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

===============================================================================
>>                                                      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 to CERT-NL information contained in this advisory are therefore outdated.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  <<
===============================================================================
===============================================================================
Security Advisory                                                       CERT-NL
===============================================================================
Author/Source : Don Stikvoort                               Index  :    S-95-09
Distribution  : World                                       Page   :          1
Classification: External                                    Version:          1
Subject:  SGI permissions tool & colorview vulnerabilities  Date   :  10-Mar-95
===============================================================================

By courtesy of SGI and CERT/CC we received the following information 
about two separate vulnerabilities:
- - - - - desktop permissions tool vulnerability (IRIX 5.2 6.0);
- - - - - colorview vulnerability (IRIX 5.1 5.2 6.0):


==============================================================================
===========  PERMISSIONS TOOL VULNERABILITY  ====  IRIX 5.2 6.0  =============
==============================================================================

________________________________________________________________________________
                Silicon Graphics Inc. Security Advisory

        Title: IRIX 5.2, 6.0, 6.0.1 Desktop Permissions Tool
                Number:         19950301-01-P373
                Date:           March 3, 1995
________________________________________________________________________________

Silicon Graphics provides this information freely to the SGI community
for its consideration, interpretation and implementation.   Silicon Graphics
recommends that this information be acted upon as soon as possible.

Silicon Graphics will not be liable for any consequential damages arising
from the use of, or failure to use or use properly, any of the instructions
or information in this Security Advisory.
________________________________________________________________________________


A vulnerability has been discovered in the IRIX 5.2, 6.0, and 6.0.1 operating
systems regarding the permissions tool under the IRIX desktop environment.
Normally, this tool is used by users to modify the permissions on their files
and files they are privileged for.  Under certain conditions, a user may be
able to modify the permissions for any file.  This is identified as SGI
SCR # 265071.

SGI Engineering has investigated this issue and recommends the following
steps for neutralizing the exposure.  It is HIGHLY RECOMMENDED that these
measures be done on ALL SGI systems running IRIX 5.2, 6.0, and 6.0.1 .
This issue is corrected in 5.3 of IRIX and will be corrected in future
releases of IRIX.

- - - - - --------------------------
- - - - - --- Immediate Solution ---
- - - - - --------------------------

The most immediate solution for this issue is to remove the setuid/setgid
bits on /usr/lib/permissions, or to remove the tool entirely.  Removing the
setuid/setgid bits will limit the tool to only function on files owned by
the user using the tool.

        1) Become the root user on the system.

                % /bin/su -
                Password:
                #

        2) Change the unix permissions level on the desktop
        permissions program.


                # chmod u-s /usr/lib/desktop/permissions
                # chmod g-s /usr/lib/desktop/permissions

        3) Return to previous user.

                # exit
                %


- - - - - --------------------------
- - - - - --- Long Term Solution ---
- - - - - --------------------------

*** IRIX 5.0.x, 5.1.x ****

The versions 5.0.x and 5.1.x of IRIX were limited hardware, specific
releases and have since been obsoleted by later versions of IRIX.  For
supportability reasons, upgrading to atleast IRIX 5.2 is recommended
as a first step for all problem resolution.   IRIX 5.0.x, 5.1.x ARE
NOT subject to this vulernability.


**** IRIX 5.2, 6.0, 6.0.1 ****

        >>>> IRIX 5.3 IS NOT SUBJECT TO THIS VULNERABILITY. <<<<

For the IRIX operating system versions 5.2, 6.0 and 6.0.1, an inst-able
patch has been generated and made available via anonymous ftp and/or your
service/support provider.  The patch is number 373 and will install on
IRIX 5.2, 6.0 and 6.0.1 .

- - - - - -NOTE- Inst-able patches require a patch-aware inst program.  The stock
5.2 inst program with the base install is not patch-aware.  The 6.0
and 6.0.1 inst programs are.  A patch-aware inst program for IRIX 5.2 is
available as patch number 0, 34, or 84.  Any one of these may be used, with
84 the latest, most recommended, and available via your service provider
or the usual SGI anonymous ftp sites.

The SGI anonymous ftp site is ftp.sgi.com (192.48.153.1).  Additionally,
the alternative SGI anonymous ftp site, sgigate.sgi.com,  can be accessed
to find the same files.  On each of these servers, patch 373 can be found
in the following directories:

        ~ftp/Security

                or

        ~ftp/Patches/5.2
        ~ftp/Patches/6.0
        ~ftp/Patches/6.0.1

                        ##### Checksums ####

The actual patch will be a tar file containing the following files:

Filename:                 patchSG0000373
Algorithm #1 (sum -r):    51249 1 patchSG0000373
Algorithm #2 (sum):       21641 1 patchSG0000373
MD5 checksum:             40A604013A05C2521152ED4B51C5D9A5

Filename:                 patchSG0000373.desktop_eoe_sw
Algorithm #1 (sum -r):    09134 88 patchSG0000373.desktop_eoe_sw
Algorithm #2 (sum):       63013 88 patchSG0000373.desktop_eoe_sw
MD5 checksum:             D74F9BDED3D51E9D28666CADF1B31945

Filename:                 patchSG0000373.idb
Algorithm #1 (sum -r):    50435 1 patchSG0000373.idb
Algorithm #2 (sum):       41363 1 patchSG0000373.idb
MD5 checksum:             790E9A47909BC32D8E9FCE14EA4077D8

- - - - - ------------------------------------
- - - - - --- Further Information/Contacts ---
- - - - - ------------------------------------

For obtaining security information, patches or assistance, please
contact your SGI support provider.

If there are questions about this document, email can be sent to
cse-security-alert@csd.sgi.com .

For reporting *NEW* SGI security issues, email can be sent to
security-alert@sgi.com .



==============================================================================
========   COLORVIEW VULNERABILITY  ====  IRIX 5.1 5.2 6.0  ==================
==============================================================================

________________________________________________________________________________
    Silicon Graphics Inc. Security Advisory

  Title: colorview program allows reading of any file
    Number:  19950209-00-P
    Date:  February, 9, 1995
________________________________________________________________________________

Silicon Graphics provides this information freely to the SGI community
for its consideration, interpretation and implementation.   Silicon Graphics
recommends that this information be acted upon as soon as possible.

Silicon Graphics will not be liable for any consequential damages arising
from the use of, or failure to use or use properly, any of the instructions
or information in this Security Advisory.
________________________________________________________________________________


A vulnerability has been discovered in the IRIX 5.1.x, 5.2, 6.0 and
6.0.1 operating systems which would allow the colorview program to be 
used to view any file on the system.

SGI Engineering has investigated this issue and recommends the following 
steps for neutralizing the exposure.  It is HIGHLY RECOMMENDED that these 
measures be done on ALL SGI systems running IRIX 5.1.x,  5.2, 6.0 and
6.0.1 . The issue will be permanently corrected in future releases of IRIX.

- - - - - --------------------------
- - - - - --- Immediate Solution ---
- - - - - --------------------------
  
To correct this issue, it is recommended to remove the setuid bit on the
colorview program.  The following steps are provided to do this.

  1) Become the root user on the system.
  
    % /bin/su
    Password:
    #

  2) Change the permissions on the colorview program to remove
  the setuid permission.

    # chmod u-s /usr/sbin/colorview


  3) Verify the permissions and ownership to be as follows 
  after step 2.

    # cd /usr/sbin
    # ls -al colorview
    -rwxr-xr-x    1 root  sys   396376 Jan 18 18:40 colorview


- - - - - --------------------------
- - - - - --- Long Term Solution ---
- - - - - --------------------------

There is no patch for this issue.  For 5.1.x and 5.2 versions, this has 
been corrected in IRIX 5.3.


- - - - - ------------------------------------
- - - - - --- Further Information/Contacts ---
- - - - - ------------------------------------

For obtaining security information, patches or assistance, please
contact your SGI support provider.

For reporting new SGI security issues, email can be sent to
security-alert@sgi.com .
==============================================================================
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.
===============================================================================

-----BEGIN PGP SIGNATURE-----
Version: PGP 6.5.1i

iQA/AwUBOL6IETSYjBqwfc9jEQI+AACeN11Are3GO8pZgIwqN0NW9mpX3B4AoKr5
D2GcCvc+14LYxTSuCPrrscPS
=FhOz
-----END PGP SIGNATURE-----