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             __________________________________________________________

                       The U.S. Department of Energy
                    Computer Incident Advisory Capability
                           ___  __ __    _     ___
                          /       |     /_\   /
                          \___  __|__  /   \  \___
             __________________________________________________________

                             INFORMATION BULLETIN

                       SGI Object Server Vulnerability

January 9, 1996 18:00 GMT                                        Number G-07
______________________________________________________________________________

PROBLEM:     A problem in the Object Server software contained in the IRIX 5.x 
             and IRIX 6.x operating systems, allows local and remote users to 
             get root.
PLATFORM:    SGI platforms running the IRIX 5.x and IRIX 6.x operating 
             systems.
DAMAGE:      Unauthorized users can get root.
SOLUTION:    Replace the object server program and assistant programs using 
             patches from SGI.
______________________________________________________________________________
VULNERABILITY  Provided with the correct network configuration and SGI 
ASSESSMENT:    environment, both local and remote users may be able to become
               root on a targeted SGI system.
______________________________________________________________________________
       CRITICAL Information for patching SGI Object Server Vulnerabilities

CIAC has obtained information from Silicon Graphics Inc. describing a 
vulnerability in the SGI Object Server Software and patches to remove that 
vulnerability.

[ Start SGI Security Bulletin ]

______________________________________________________________________________
                Silicon Graphics Inc. Security Advisory

        Title:   Object Server Vulnerability
        Number:  19960101-01-PX
        Date:    January 3, 1996

______________________________________________________________________________

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.
______________________________________________________________________________


As part of Silicon Graphics continued security improvement efforts, Silicon
Graphics has discovered a security vulnerability within the object server
program used in the IRIX 5.x and IRIX 6.x operating systems.  SGI has
investigated this issue and recommends the following steps for neutralizing
the exposure.  It is HIGHLY RECOMMENDED that these measures be implemented
on ALL SGI systems running IRIX 5.2, 5.3, 6.0, 6.0.1 and 6.1.  This issue
will be corrected in future releases of IRIX.


- - --------------
- - --- Impact ---
- - --------------

Provided with the correct network configuration and SGI environment, both
local and remote users may be able to become root on a targeted SGI system.


- - ----------------
- - --- Solution ---
- - ----------------

The solution for this issue is a replacement of the object server program
and assistant programs for those versions that are vulnerable.  The
following patches have been generated for those versions vulnerable and
are freely provided to the SGI community.



**** IRIX 3.x ****

This version of IRIX is not vulnerable.  No action is required.


**** IRIX 4.x ****

This version of IRIX is not vulnerable.  No action is required.


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

For the IRIX operating systems versions 5.0.x, 5.1.x, an upgrade
to 5.2 or better is required first.  When the upgrade is completed,
then the patches described in the next sections "**** IRIX 5.2, 6.0,
6.0.1 ***"  or "**** IRIX 5.3 ****" or "**** IRIX 6.1 ****" can be
applied depending on the final version of upgrade.


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

For the IRIX operating system versions 5.2, 6.0, and 6.0.1, an installable
patch has been generated and made available via anonymous ftp and/or your
service/support provider.  The patch is number 1052 and will only install
on IRIX versions 5.2, 6.0, and 6.0.1 .

The SGI anonymous ftp site is sgigate.sgi.com (204.94.209.1).   Patch
1052 can be found in the following directories on the ftp server:

        ~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:                 README.patch.1052
Algorithm #1 (sum -r):    16512 8 README.patch.1052
Algorithm #2 (sum):       59284 8 README.patch.1052
MD5 checksum:             4E8FA3A3305C68BC18EC52564C6B2AED

Filename:                 patchSG0001052
Algorithm #1 (sum -r):    51587 1 patchSG0001052
Algorithm #2 (sum):       32069 1 patchSG0001052
MD5 checksum:             E0E3487A8A36A8B854BD704E35CA7245

Filename:                 patchSG0001052.cadmin_sw
Algorithm #1 (sum -r):    63062 548 patchSG0001052.cadmin_sw
Algorithm #2 (sum):       51720 548 patchSG0001052.cadmin_sw
MD5 checksum:             E8612BF40C60DBC9D7A90FAC6F8EF102

Filename:                 patchSG0001052.idb
Algorithm #1 (sum -r):    07247 1 patchSG0001052.idb
Algorithm #2 (sum):       40615 1 patchSG0001052.idb
MD5 checksum:             580F688D98950F250BF47AC82EB91FFB


**** IRIX 5.3 ****

For the 5.3 IRIX operating system, an installable patch has been generated
and made available via anonymous ftp and/or your service/support provider.
The patch is number 1048 and will only install on IRIX 5.3 .

The SGI anonymous ftp site is sgigate.sgi.com (204.94.209.1).   Patch
1048 can be found in the following directories on the ftp server:

        ~ftp/Security

                or

        ~ftp/Patches/5.3

                        ##### Checksums ####

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

Filename:                 README.patch.1048
Algorithm #1 (sum -r):    37177 9 README.patch.1048
Algorithm #2 (sum):       1825 9 README.patch.1048
MD5 checksum:             D0CE2B1132B417F3B9215AA9F85CA073

Filename:                 patchSG0001048
Algorithm #1 (sum -r):    42189 4 patchSG0001048
Algorithm #2 (sum):       56038 4 patchSG0001048
MD5 checksum:             456BF186B65A56EA413E9E7AD4BDE17A

Filename:                 patchSG0001048.cadmin_sw
Algorithm #1 (sum -r):    47788 698 patchSG0001048.cadmin_sw
Algorithm #2 (sum):       55041 698 patchSG0001048.cadmin_sw
MD5 checksum:             7E3239ED9F110567B02176EC16B93F94

Filename:                 patchSG0001048.eoe1_sw
Algorithm #1 (sum -r):    53666 12 patchSG0001048.eoe1_sw
Algorithm #2 (sum):       30809 12 patchSG0001048.eoe1_sw
MD5 checksum:             32F087EB64444279DF865D104664BE47

Filename:                 patchSG0001048.eoe2_sw
Algorithm #1 (sum -r):    01942 132 patchSG0001048.eoe2_sw
Algorithm #2 (sum):       33035 132 patchSG0001048.eoe2_sw
MD5 checksum:             E5242DE17431D40BC5FCD49925BE3283

Filename:                 patchSG0001048.idb
Algorithm #1 (sum -r):    37645 2 patchSG0001048.idb
Algorithm #2 (sum):       10420 2 patchSG0001048.idb
MD5 checksum:             460C69356D5AA920978F7A9FF49A4612


**** IRIX 6.1 ****

For the IRIX operating system version 6.1, an installable patch has
been generated and made available via anonymous ftp and/or your
service/support provider.  The patch is number 1090 and will
install on IRIX 6.1 .

The SGI anonymous ftp site is sgigate.sgi.com (204.94.209.1).   Patch
1090 can be found in the following directories on the ftp server:

        ~ftp/Security

                or

        ~ftp/Patches/6.1

                        ##### Checksums ####

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

Filename:                 README.patch.1090
Algorithm #1 (sum -r):    28420 8 README.patch.1090
Algorithm #2 (sum):       59862 8 README.patch.1090
MD5 checksum:             7CA042E478210D2E90A93F9B71D31455

Filename:                 patchSG0001090
Algorithm #1 (sum -r):    38512 1 patchSG0001090
Algorithm #2 (sum):       37227 1 patchSG0001090
MD5 checksum:             7A266E0BFCE18322F7034BB4520C6824

Filename:                 patchSG0001090.cadmin_sw
Algorithm #1 (sum -r):    45703 689 patchSG0001090.cadmin_sw
Algorithm #2 (sum):       29950 689 patchSG0001090.cadmin_sw
MD5 checksum:             9EB38D49CDDF439EE1110797FEC5BC6B

Filename:                 patchSG0001090.idb
Algorithm #1 (sum -r):    46990 1 patchSG0001090.idb
Algorithm #2 (sum):       40298 1 patchSG0001090.idb
MD5 checksum:             05E8F138BF0331BFEF8454074519F40A

- - ------------------------
- - --- Acknowledgments ---
- - ------------------------

Silicon Graphics wishes to thank Kari E. Hurtta, FIRST members and
CERT organizations worldwide for their assistance in this matter.

- - -----------------------------------------
- - --- SGI Security Information/Contacts ---
- - -----------------------------------------

Past SGI Advisories and security patches can be obtained via
anonymous FTP from sgigate.sgi.com or mirror site ftp.sgi.com .
These security patches and advisories are provided freely to
all interested parties.   For issues with the patches on the
FTP sites, email can be sent to cse-security-alert@csd.sgi.com .

For assistance obtaining or working with security patches, 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 or contacting your SGI support provider.

[ End SGI Security Bulletin ]

______________________________________________________________________________

CIAC wishes to acknowledge Silicon Graphics Inc. for the information contained 
in this bulletin.
______________________________________________________________________________


CIAC, the Computer Incident Advisory Capability, is the computer security 
incident response team for the U.S. Department of Energy (DOE) and the backup 
response team for the National Institute of Health (NIH). CIAC is located at 
the Lawrence Livermore National Laboratory in Livermore, California. CIAC is 
also a founding member of FIRST, the Forum of Incident Response and Security 
Teams, a global organization established to foster cooperation and 
coordination among computer security teams worldwide.

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CIAC can be contacted at:
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For emergencies and off-hour assistance, DOE, DOE contractor sites, and the 
NIH may contact CIAC 24-hours a day. During off hours (5PM - 8AM PST), call 
the CIAC voice number 510-422-8193 and leave a message, or call 800-759-7243 
(800-SKY-PAGE) to send a Sky Page. CIAC has two Sky Page PIN numbers, the 
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Previous CIAC notices, anti-virus software, and other information are 
available from the CIAC Computer Security Archive. 

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PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing 
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receive CIAC bulletins.  If you are not part of these communities, please
contact your agency's response team to report incidents. Your agency's team
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This document was prepared as an account of work sponsored by an agency of the
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