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________________________________________________________________________________
        Sun Microsystems, Inc. Security Bulletin
     
Bulletin Number:  #00202
Date:       May 15, 2001
Cross-Ref:    
Title:      i386 syscalls
________________________________________________________________________________

The information contained in this Security Bulletin is provided "AS IS." 
Sun makes no warranties of any kind whatsoever with respect to the information 
contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS, 
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If any of the above provisions are held to be in violation of applicable law, 
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________________________________________________________________________________

1.  Bulletins Topics

    This issue is only present on the Intel Platform Edition of
    Solaris.

    Sun announces the release of patches for Intel Platform Editions
    of Solaris(tm) 8, 7, and 2.6 (SunOS(tm) 5.8_x86, 5.7_x86, and 5.6_x86) 
    which relate to a vulnerability in user-supplied arguments to a syscall 
    on i386 platforms.  
    
    Sun recommends that you install the patches listed in section 4 
    immediately on systems running SunOS 5.8_x86, 5.7_x86, and 5.6_x86.
    or Trusted Solaris 8_x86 and 7_x86.

2.  Who is Affected
      
  Vulnerable:    Intel Platform Edition of Solaris 8, 7,
        and 2.6 (SunOS 5.8_x86, 5.7_x86, and 5.6_x86).
                                
                                Intel Platform Edition of Trusted Solaris 8
                                and 7.

      Not vulnerable:    All SPARC Platform Editions of Solaris and 
        Intel Platform Editions of Solaris prior
                                to 2.6.

      
3.  Understanding the Vulnerability

    The Intel i386 architecture supports a protection and segmentation
    model which allows different levels of privilege.  Carefully 
    constructed arguments could allow access to higher privilege than
    intended which could be used to control arbitrary addresses in kernel 
    memory.
        
4.  List of Patches

    The following patches are available in relation to the above problems.
    
    OS Version    Patch ID        
    __________    _________    
    SunOS 5.8_x86  108529-07    
    SunOS 5.7_x86  106542-16    
    SunOS 5.6_x86  105182-27 (Scheduled availability June 18, 2001)

    Trusted Solaris 
    _______________
    TS8_x86     110338-02 (available soon)
    TS7_x86    109597-05 (available soon)
    
_______________________________________________________________________________
APPENDICES

A.  Patches listed in this bulletin are available to all Sun customers at:
    
    http://sunsolve.sun.com/securitypatch
    
B.  Checksums for the patches listed in this bulletin are available at:

    ftp://sunsolve.sun.com/pub/patches/CHECKSUMS

C.  Sun security bulletins are available at:

    http://sunsolve.sun.com/security
  
D.  Sun Security Coordination Team's PGP key is available at:

    http://sunsolve.sun.com/pgpkey.txt
                    
E.  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

F.  To receive information or subscribe to our CWS (Customer Warning System) 
    mailing list, send email to:
    
        security-alert@sun.com
   
    with a subject line (not body) containing one of the following commands:

        Command         Information Returned/Action Taken
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________________________________________________________________________________

Copyright 2001 Sun Microsystems, Inc. All rights reserved. Sun, 
Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks 
of Sun Microsystems, Inc. in the United States and other countries. This 
Security Bulletin may be reproduced and distributed, provided that this 
Security Bulletin is not modified in any way and is attributed to 
Sun Microsystems, Inc. and provided that such reproduction and distribution 
is performed for non-commercial purposes.

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