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Find Support Information and Customer Communities for Presario.
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Tru64/DIGITAL UNIX V4.0b, V4.0d, V4.0e and V4.0f
Copyright (c) Compaq Computer Corporation 1999.  All rights reserved.

        * No Restrictions For Distribution *
UPDATE:                                     May 11, 1999

TITLE: Tru64/DIGITAL UNIX V4.0b, V4.0d, V4.0e and V4.0f
         - Potential Security Vulnerability
       ref#: SSRT0600U "dtlogin" 
SOURCE: Compaq Computer Corporation Software Security Response Team 

 "Compaq is broadly distributing this Security Advisory in order
 to bring to the attention of users of Compaq products the
 important security information contained in this Advisory. 
 Compaq recommends that all users determine the applicability of
 this information to their individual situations and take
 appropriate action.

 Compaq does not warrant that this information is necessarily
 accurate or complete for all user situations and, consequently,
 Compaq will not be responsible for any damages resulting from
 user's use or disregard of the information provided in this

  Compaq has discovered a potential vulnerability with the 
  /usr/dt/bin/dtlogin in Compaq's Tru64/DIGITAL UNIX software, 
  where under certain circumstances, a user may gain unauthorized 
  access as superuser.


 This potential security problem has been resolved and a
 patch for this problem has been made available for 
 Tru64/DIGITAL UNIX V4.0B, V4.0D, V4.0E and V4.0F. 
 Systems with enhanced security enabled and one or more of 
 the products listed below, should install this patch immediately.
           - Distributed Computing Environment (DCE) from Compaq
           - Advanced Server for Digital UNIX (ASDU) from Compaq
           - AFS Enterprise File Systems from Transarc
           - Kerberos 4 Network Authentication Protocol from MIT

 If you need this patch for V4.0, V4.0A or V4.0C, please contact
 your normal Compaq Services support channel. 
 *This solution will be included in a future distributed release of 
  Compaq's Tru64/DIGITAL UNIX. 

  This patch may be obtained from the World Wide Web at the
  following FTP address:


	Use the FTP access option, select DIGITAL_UNIX directory,
	then choose the appropriate version directory and
	download the patch accordingly. 

  Note: [1]  The appropriate patch kit must be installed
  	following any upgrade to V4.0b, V4.0d, V4.0e or V4.0f.
	[1a] These patches may be used on any patch kit/base level. 

        [2]   IMPORTANT - Please review all README and 
      	release notes which are related to this patch or an
	official patch kit, prior to installation of this patch.
 Additional Considerations:

   This patch updates the following component:

   If you believe you have, or aren't sure if you have, previously
   installed a patch to this module you should contact your
   normal Compaq Service channel.
   Also, if you need further information, please contact your normal 
   Compaq Services support channel.

   Compaq appreciates your cooperation and patience. We regret any
   inconvenience applying this information may cause.

   As always, Compaq urges you to periodically review your system
   management and security procedures. 

   Compaq will continue to review and enhance the security
   features of its products and work with customers to maintain and
   improve the security and integrity of their systems.

  Copyright (c) Compaq Computer Corporation, 1999 All
  Rights Reserved.
  Unpublished Rights Reserved under the Copyright Laws Of
  The United States.

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