TUCoPS :: Unix :: Various Flavours :: ciaci050.txt

Digital Unix Softlinks Advfs



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

                             INFORMATION BULLETIN

                      Digital UNIX softlinks - advfs Vulnerability

May 7, 1998 23:00 GMT                                             Number I-050
PROBLEM:       Digital has identified a vulnerability in the Advanced File
               System Utility.
PLATFORM:      Digital UNIX V4.0, V4.0a, V4.0b, V4.0c, and V4.0d.
DAMAGE:        Under certain circumstances a local user may gain unauthorized
SOLUTION:      Apply patch.
VULNERABILITY  Digital strongly recommends upgrading to a minimum of Digital
ASSESSMENT:    UNIX V4.0b accordingly, and that the appropriate patch kit be
               installed immediately.

[  Start Digital Advisory  ]

UPDATE:                                           APR 30, 1998

  TITLE: DIGITAL UNIX   softlinks - advfs V4.0, V4.0a, V4.0b,
                                             V4.0c, V4.0d
         - Potential Security Vulnerability
        Ref#: SSRT0495U
  SOURCE: Digital Equipment Corporation
          Software Security Response Team

 "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

- ----------------------------------------------------------------------
  Digital has discovered a potential vulnerability with the
  Advanced File System Utility for DIGITAL UNIX
  software, where under certain circumstances, an authorized
  user may gain unauthorized privileges.

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

 This potential security problem has been resolved and an official
 patch for this problem has been made available as an early release
 kit for DIGITAL UNIX V4.0a (duv40ass0000600037800-19980317.*)
 and included in the latest DIGITAL UNIX V4.0b and V4.0d
 aggregate DUPATCH Kit.
         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.

  o 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 V4.0a, V4.0b or V4.0d.
        [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.

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

[  End Digital Advisory  ]


CIAC wishes to acknowledge the contributions of Digital Equip Corp. for the
information contained in this bulletin.

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
can be contacted at:
    Voice:    +1 925-422-8193
    FAX:      +1 925-423-8002
    STU-III:  +1 925-423-2604
    E-mail:   ciac@llnl.gov

For emergencies and off-hour assistance, DOE, DOE contractor sites,
and the NIH may contact CIAC 24-hours a day. During off hours (5PM -
8AM PST), call the CIAC voice number 925-422-8193 and leave a message,
or call 800-759-7243 (800-SKY-PAGE) to send a Sky Page. CIAC has two
Sky Page PIN numbers, the primary PIN number, 8550070, is for the CIAC
duty person, and the secondary PIN number, 8550074 is for the CIAC
Project Leader.

Previous CIAC notices, anti-virus software, and other information are
available from the CIAC Computer Security Archive.

   World Wide Web:      http://www.ciac.org/
                        (or http://ciac.llnl.gov -- they're the same machine)
   Anonymous FTP:       ftp.ciac.org
                        (or ciac.llnl.gov -- they're the same machine)
   Modem access:        +1 (925) 423-4753 (28.8K baud)
                        +1 (925) 423-3331 (28.8K baud)

CIAC has several self-subscribing mailing lists for electronic
1. CIAC-BULLETIN for Advisories, highest priority - time critical
   information and Bulletins, important computer security information;
2. SPI-ANNOUNCE for official news about Security Profile Inspector
   (SPI) software updates, new features, distribution and
3. SPI-NOTES, for discussion of problems and solutions regarding the
   use of SPI products.

Our mailing lists are managed by a public domain software package
called Majordomo, which ignores E-mail header subject lines. To
subscribe (add yourself) to one of our mailing lists, send the
following request as the E-mail message body, substituting
ciac-bulletin, spi-announce OR spi-notes for list-name:

E-mail to       ciac-listproc@llnl.gov or majordomo@tholia.llnl.gov:
        subscribe list-name
  e.g., subscribe ciac-bulletin

You will receive an acknowledgment email immediately with a confirmation
that you will need to mail back to the addresses above, as per the
instructions in the email.  This is a partial protection to make sure
you are really the one who asked to be signed up for the list in question.

If you include the word 'help' in the body of an email to the above address,
it will also send back an information file on how to subscribe/unsubscribe,
get past issues of CIAC bulletins via email, etc.

PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
communities receive CIAC bulletins.  If you are not part of these
communities, please contact your agency's response team to report
incidents. Your agency's team will coordinate with CIAC. The Forum of
Incident Response and Security Teams (FIRST) is a world-wide
organization. A list of FIRST member organizations and their
constituencies can be obtained via WWW at http://www.first.org/.

This document was prepared as an account of work sponsored by an
agency of the United States Government. Neither the United States
Government nor the University of California nor any of their
employees, makes any warranty, express or implied, or assumes any
legal liability or responsibility for the accuracy, completeness, or
usefulness of any information, apparatus, product, or process
disclosed, or represents that its use would not infringe privately
owned rights. Reference herein to any specific commercial products,
process, or service by trade name, trademark, manufacturer, or
otherwise, does not necessarily constitute or imply its endorsement,
recommendation or favoring by the United States Government or the
University of California. The views and opinions of authors expressed
herein do not necessarily state or reflect those of the United States
Government or the University of California, and shall not be used for
advertising or product endorsement purposes.

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