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UPDATE:                                         APR 30, 1998

  TITLE:     DIGITAL UNIX ftpd    V3.2g, V4.0, V4.0a, V4.0b, V4.0c
                  Potential Security Vulnerability
                  Ref #: SSRT0505U

  SOURCE:      Digital Equipment Corporation
                        Software Security Response Team USA

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

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

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IMPACT:

  Digital has discovered a potential vulnerability with  ftp
  for DIGITAL UNIX software, where under certain circumstances, a user
  may gain unauthorized file access.

  Digital strongly recommends upgrading to a minimum of
  Digital UNIX V4.0b accordingly, and that the appropriate
  patch kit be installed immediately.

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RESOLUTION:

This potential security problem has been resolved in V4.0d and an official
patch for this problem has been made available as an early release
kit for DIGITAL UNIX V4.0a (duv40ass0000600039300-19980317.*)
and included in the latest DIGITAL UNIX V4.0b
aggregate DUPATCH Kit.
         The V3.2g aggregate BL 10 patch kit #5
         is scheduled for release in late June 1998.
         The V4.0 aggregate  BL 9 patch kit #6
         is scheduled for release mid May 1998.
         The V4.0c aggregate BL10 patch kit #6
         is scheduled for release mid May 1998.

*This potential problem was included in the distributed release of
DIGITAL UNIX V4.0d



  o the World Wide Web at the following FTP address:

    http://www.service.digital.com/html/patch_service.html
    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 V4.0a, V4.0b, or V4.0c

        [2] Please review the appropriate release notes
        prior to installation.

If you need further information, please contact your normal DIGITAL
support channel.

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

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

  Digital 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.



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  Copyright (c) Digital Equipment Corporation, 1998 All
  Rights Reserved.
  Unpublished Rights Reserved Under The Copyright Laws Of
  The United States.
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