TUCoPS :: Unix :: Various Flavours :: ciacj044.txt

Tru64/Digital Unix (dtlogin) Security Vulnerability



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

                             INFORMATION BULLETIN

              Tru64/Digital UNIX (dtlogin) Security Vulnerability

June 10, 1999 21:00 GMT                                          Number J-044

PROBLEM:       There is 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.
PLATFORM:      Systems running Tru64/DIGITAL UNIX V4.0B,
               V4.0D, V4.0E and V4.0F.
DAMAGE:        Under certain circumstances, a user may gain
               unauthorized access as superuser.
SOLUTION:      Apply the vendor-supplied patch.
VULNERABILITY  The risk is high due to the possibility of gaining a root
ASSESSMENT:    compromise.

[  Start Compaq Computer Corporation Advisory  ]

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.

[  End Compaq Computer Corporation Advisory  ]


CIAC wishes to acknowledge the Compaq Computer Corporation for the information
contained in this bulletin.

For additional information or assistance, please contact CIAC:

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.

CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
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This document was prepared as an account of work sponsored by an
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