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________________________________________________________________________________
                   Sun Microsystems, Inc. Security Bulletin
                
Bulletin Number:   #00213
Date:              December 14, 2001            
Cross-Ref:         CERT Advisory CA-2001-34
Title:             login
________________________________________________________________________________

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, 
REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR 
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE 
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OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARDLESS OF ANY THEORY OF LIABILITY 
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If any of the above provisions are held to be in violation of applicable law, 
void, or unenforceable in any jurisdiction, then such provisions are waived 
to the extent necessary for this disclaimer to be otherwise enforceable in 
such jurisdiction.
________________________________________________________________________________


1.  Bulletins Topics

    Sun announces the release of patches for Solaris(tm) 8, 7, 2.6,
    and 2.5.1 (SunOS(tm) 5.8, 5.7, 5.6, and 5.5.1) which
    relate to a buffer overflow vulnerability in /bin/login.

    Sun recommends that you install the patches listed in section 4
    immediately on systems running SunOS 5.8, 5.7, 5.6, and 5.5.1.

2.  Who is Affected
                                       
    Vulnerable:               SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6,
                              5.6_x86, 5.5.1, and 5.5.1_x86
                             
    
        
3.  Understanding the Vulnerability

    The login command is used at the beginning of each  terminal
    session  to identify oneself to the system. login is invoked
    by the system when a connection is first established,  after
    the  previous user has terminated the login shell by issuing
    the exit command.

    A buffer overflow has been discovered in login which may be
    exploited by a local or a remote attacker to gain root access
    on the affected system. This issue was discovered by ISS
    X-Force who published an advisory at:

    http://xforce.iss.net/alerts/advise105.php

    CERT Advisory CA-2001-34 is available from:

    http://www.cert.org/advisories/CA-2001-34.html
            
4.  List of Patches

    A Sun Security Bulletin is usually issued after patches are 
    available on SunSolve.  In this case, while the patches are
    not yet available, they are in the process of being pushed
    to external servers and should be downloadable in a very
    short time.
    
    OS Version               Patch ID
    __________               _________
    SunOS 5.8                111085-02
    SunOS 5.8_x86            111086-02
    SunOS 5.7                112300-01
    SunOS 5.7_x86            112301-01
    SunOS 5.6                105665-04
    SunOS 5.6_x86            105666-04
    SunOS 5.5.1              106160-02
    SunOS 5.5.1_x86          106161-02
                                       
______________________________________________________________________________
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) 
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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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