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                               A D V I S O R Y

                                  97.25
******************************************************************************
Topic:  SunOS eeprom Vulnerability
Source: CIAC

Creation Date: June 25, 1997 16:00 GMT
Last Updated:


To aid in the wide distribution of essential security information, FedCIRC is
forwarding the following information from CIAC bulletin H-72. FedCIRC urges
you to act on this information as soon as possible.

If you have any questions, please contact FedCIRC:

        Telephone:      +1 888 282 0870
        Email:          fedcirc@fedcirc.gov



=======================FORWARDED TEXT STARTS HERE============================

-----BEGIN PGP SIGNED MESSAGE-----

[   For Public Release   ]
             __________________________________________________________

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

                             INFORMATION BULLETIN

                          SunOS eeprom Vulnerability

June 25, 1997 16:00 GMT                                            Number H-72
______________________________________________________________________________
PROBLEM:       A buffer overflow vulnerability has been identified in the
               eeprom program.
PLATFORM:      SunOS versions 5.3-5.5.1 (Solaris 2.3-2.5.1) for SPARC only.
DAMAGE:        This vulnerability may allow local users to gain root
               privileges.
SOLUTION:      Apply vendor patches specified in Section 4.
______________________________________________________________________________
VULNERABILITY  It is highly recommended that patches be installed immediately.
ASSESSMENT:                                                                  
______________________________________________________________________________

[ Start Sun Microsystems Advisory ]

- ------------------------------------------------------------------------------
                   Sun Microsystems, Inc. Security Bulletin
               
Bulletin Number:                #00143
Date:                   June 24 1997
Cross-Ref:             
Title:                  Vulnerability in eeprom

- ------------------------------------------------------------------------------
Permission is granted for the redistribution of this Bulletin, so long as
the Bulletin is not edited and is attributed to Sun Microsystems. Portions
may also be excerpted for re-use in other security advisories so long as
proper attribution is included.

Any other use of this information without the express written consent of
Sun Microsystems is prohibited. Sun Microsystems expressly disclaims all
liability for any misuse of this information by any third party.
- ------------------------------------------------------------------------------

1.  Bulletins Topics

    Sun announces the release of patches for Solaris 2.5.1, 2.5, 2.4, and 2.3
    (SunOS 5.5.1, 5.5, 5.4, and 5.3), that relate to a vulnerability in the
    eeprom program.
   
    Sun strongly recommends that you install the patches listed in section 4
    immediately on every affected system.
   
2.  Who is Affected
       
       Vulnerable:      SunOS versions 5.5.1, 5.5, 5.4, and 5.3 for SPARC
only.
     
       Not vulnerable:  All other supported versions of SunOS
                
       The vulnerability is fixed in the upcoming release of Solaris.
    
3.  Understanding the Vulnerability

    The eeprom program changes or displays the values of parameters in EEPROM.
    The EEPROM (Electrically erasable programmable read-only memory) is a
    non-volatile PROM that holds information about the current system
    configuration, alternate boot paths, and other information. Due to
    insufficient bounds checking on arguments passed to the eeprom program,
    it is possible to overwrite the internal stack space of eeprom while it is
    executing. Since eeprom has setgid bin permissions, this vulnerability may
    allow non-privileged users to gain privileged access, including root
    privileges.
       
4.  List of Patches

    The vulnerability in eeprom is fixed by the following patches:

        OS version              Patch ID
        ----------              --------
        SunOS 5.5.1             104795-01
        SunOS 5.5               104796-01
        SunOS 5.4               104798-01      
        SunOS 5.3               104797-01      

        Intel x86 systems do not have the eeprom program and are not
        affected by this vulnerability.

5.  Checksum Table

    The checksum table below shows the BSD checksums (SunOS 5.x:
/usr/ucb/sum),
    SVR4 checksums (SunOS 5.x: /usr/bin/sum), and the MD5 digital signatures
    for the above-mentioned patches that are available from:
    
        ftp://sunsolve1.sun.com/pub/patches/patches.html
       
    These checksums may not apply if you obtain patches from your answer
    centers.

File Name             BSD             SVR4             MD5
- ---------------   ---------   ---------    --------------------------------
104795-01.tar.Z   03357 150   64333 300    3004B44BE2742A51A593DE8B76679768
104796-01.tar.Z   12042 150   18119 299    92DA0C5513E191A4C3719B3EFFB1B935
104798-01.tar.Z   40939 166   63088 332    DD89275C55397A97C4B06D1E5037723F
104797-01.tar.Z   59061 165   27937 330    BE97B2DD42A890F4E736A323E3CD8A4A

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

APPENDICES

A.  Patches listed in this bulletin are available to all Sun customers via
    World Wide Web at:
   
        ftp://sunsolve1.sun.com/pub/patches/patches.html
       
    Customers with Sun support contracts can also obtain patches from local
    Sun answer centers and SunSITEs worldwide.

B.  Sun security bulletins are available via World Wide Web at:

        http://sunsolve1.sun.com/sunsolve/secbulletins
           
C.  To report or inquire about a security problem with Sun software, contact
    one or more of the following:
 
        - Your local Sun answer centers
        - Your representative computer security response team, such as CERT
        - Sun Security Coordination Team. Send email to:
        
                security-alert@sun.com

D.  To receive information or subscribe to our CWS (Customer Warning System)
    mailing list, send email to:
   
                security-alert@sun.com
  
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        send topic      A short status summary or bulletin. For example, to
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                                send #138

        subscribe       Sender is added to our mailing list.  To subscribe,
                        supply the following in the subject line (not body):

                                subscribe cws your-email-address
                       
                        Note that your-email-address should be substituted
                        by your email address.
                       
        unsubscribe     Sender is removed from the CWS mailing list.
- ------------------------------------------------------------------------------


[ End Sun Microsystems Advisory ]

______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. for the
information contained in this bulletin.
______________________________________________________________________________


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========================FORWARDED TEXT ENDS HERE=============================

The National Institute of Standards and Technology (NIST) has
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If you believe that your system has been compromised, please contact
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* Registered in U.S. Patent and Trademark Office
 
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CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
Institutes 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.
 
This document was prepared as an account of work sponsored by an
agency of the United States Government. Neither the United States
Government nor the University of California nor any of their
employees, makes any warranty, express or implied, or assumes any
legal liability or responsibility for the accuracy, completeness, or
usefulness of any information, apparatus, product, or process
disclosed, or represents that its use would not infringe privately
owned rights. Reference herein to any specific commercial products,
process, or service by trade name, trademark, manufacturer, or
otherwise, does not necessarily constitute or imply its endorsement,
recommendation or favoring by the United States Government or the
University of California. The views and opinions of authors expressed
herein do not necessarily state or reflect those of the United States
Government or the University of California, and shall not be used for
advertising or product endorsement purposes.