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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 to CERT-NL information contained in this advisory are therefore outdated.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  <<
===============================================================================
===============================================================================
Security Advisory                                                       CERT-NL
===============================================================================
Author/Source : Rene Ritzen                                 Index  :    S-98-20
Distribution  : World                                       Page   :          1
Classification: External                                    Version:          1
Subject       : SGI Vulnerability in IRIX LicenseManager(1M)Date   :  14-Apr-98
===============================================================================
By courtesy of Silicon Graphics, Inc. we received information on a
Vulnerability in IRIX LicenseManager(1M)

CERT-NL recommends to install the patches outlined below in the section
temporary solution.
______________________________________________________________________________
                Silicon Graphics Inc. Security Advisory

        Title:   IRIX LicenseManager(1M) Vulnerabilities
        Number:  19980406-01-PX
        Date:    April 13, 1998
______________________________________________________________________________

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

Silicon Graphics provides the information in this Security Advisory on
an "AS-IS" basis only, and disclaims all warranties with respect thereto,
express, implied or otherwise, including, without limitation, any warranty
of merchantability or fitness for a particular purpose.  In no event shall
Silicon Graphics be liable for any loss of profits, loss of business, loss
of data or for any indirect, special, exemplary, incidental or consequential
damages of any kind arising from your use of, failure to use or improper
use of any of the instructions or information in this Security Advisory.
______________________________________________________________________________

- - - -----------------------
- - - --- Issue Specifics ---
- - - -----------------------

Under normal operation LicenseManager(1M) is a program used to view and
manage FLEXlm and NetLS software licenses. Unfortunately, a set of
vulnerabilities has been discovered that allows LicenseManager(1M) to
arbitrary manipulate root-owned files allowing root access.

Silicon Graphics Inc. has investigated the issue and recommends the
following steps for neutralizing the exposure.  It is HIGHLY RECOMMENDED
that these measures be implemented on ALL vulnerable SGI systems.  This
issue will be corrected in future releases of IRIX.


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

The LicenseManager(1M) program is installed by default from license_eoe
software subsystem.  license_eoe 3.0, 3.1 and 3.1.1 are vulnerable to this
exploit.

A user account on the vulnerable system is required in order to exploit
LicenseManager(1M) locally and remotely.

This vulnerability has been publically discussed in Usenet newsgroups
and mailing lists.


- - - --------------------------
- - - --- Temporary Solution ---
- - - --------------------------

Although patches are available for this issue, it is realized that
there may be situations where installing the patches immediately may
not be possible.

The steps below can be used to remove the vulnerability by removing
the permissions of the LicenseManager(1M) program.



     1) Become the root user on the system.

                % /bin/su -
                Password:
                #


     2) Verify a vulnerable LicenseManager(1M) program is installed.
        Only license_eoe 3.0, 3.1 and 3.1.1 are vulnerable.

                #  versions -b license_eoe
                I = Installed, R = Removed

                Name                 Date      Description
                I  license_eoe       04/30/97  License Tools 3.1.1


     3) Change the permissions on the vulnerable LicenseManger(1M) program.

                # /bin/chmod 500 /usr/etc/LicenseManager

                           ************
                           *** NOTE ***
                           ************

               Removing the permissions from the vulnerable program will
               prevent non-root users from accessing LicenseManager(1M).


     4) Verify the new permissions on the program.
        Note that the program size may be different depending on release.

                # ls -al /usr/etc/LicenseManager
                -r-x------   1 root sys  489960  Aug 12 1997 LicenseManager


     5) Return to previous user level.

                # exit
                $



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

   OS Version     Vulnerable?     Patch #      Other Actions
   ----------     -----------     -------      -------------

   IRIX 3.x          no
   IRIX 4.x          no
   IRIX 5.0.x        no
   IRIX 5.1.x        no
   IRIX 5.2          no
   IRIX 5.3          yes          1678
   IRIX 6.0.x        no
   IRIX 6.1          yes          not avail    see Note 1
   IRIX 6.2          yes          1678
   IRIX 6.3          yes          1695
   IRIX 6.4          no


   NOTES

     1) upgrade operating system or see "Temporary Solution" section.



Patches are available via anonymous FTP and your service/support provider.

The SGI anonymous FTP site is sgigate.sgi.com (204.94.209.1) or its
mirror, ftp.sgi.com.  Security information and patches can be found
in the ~ftp/security and ~ftp/patches directories, respectfully.



                 ##### Patch File Checksums ####

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

Filename:                 README.patch.1678
Algorithm #1 (sum -r):    17618 8 README.patch.1678
Algorithm #2 (sum):       40340 8 README.patch.1678
MD5 checksum:             906F439EF5223C3983075E81BABA9FB4

Filename:                 patchSG0001678
Algorithm #1 (sum -r):    59371 2 patchSG0001678
Algorithm #2 (sum):       43134 2 patchSG0001678
MD5 checksum:             0EF19CA382CE0A6AA37A00C902887FEA

Filename:                 patchSG0001678.idb
Algorithm #1 (sum -r):    57535 2 patchSG0001678.idb
Algorithm #2 (sum):       53685 2 patchSG0001678.idb
MD5 checksum:             DF0690A6221F58AB341B454EC5AEB547

Filename:                 patchSG0001678.license_eoe_sw
Algorithm #1 (sum -r):    34073 467 patchSG0001678.license_eoe_sw
Algorithm #2 (sum):       14344 467 patchSG0001678.license_eoe_sw
MD5 checksum:             4BB892CEFAB1B30E60AFBFCA60FB8973

Filename:                 README.patch.1695
Algorithm #1 (sum -r):    11915 8 README.patch.1695
Algorithm #2 (sum):       39231 8 README.patch.1695
MD5 checksum:             40C01BDA39D2E04BAA8D230F2FBD4448

Filename:                 patchSG0001695
Algorithm #1 (sum -r):    38972 2 patchSG0001695
Algorithm #2 (sum):       39704 2 patchSG0001695
MD5 checksum:             DE1959B750CB6E7325098117DBE65D3A

Filename:                 patchSG0001695.idb
Algorithm #1 (sum -r):    51707 2 patchSG0001695.idb
Algorithm #2 (sum):       52218 2 patchSG0001695.idb
MD5 checksum:             5789D0AF24D8C0045453D0269374BD62

Filename:                 patchSG0001695.license_eoe_sw
Algorithm #1 (sum -r):    49617 455 patchSG0001695.license_eoe_sw
Algorithm #2 (sum):       32263 455 patchSG0001695.license_eoe_sw
MD5 checksum:             90B7D8ACCCC1045CE77DB882748A7FC0


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

Silicon Graphics wishes to thank the Internet community at large for their
assistance in this matter.


- - - -----------------------------------------------------------
- - - --- Silicon Graphics Inc. Security Information/Contacts ---
- - - -----------------------------------------------------------

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

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