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Security Advisory                                                       CERT-NL
===============================================================================
Author/Source : Xander Jansen                               Index  :    S-96-49
Distribution  : World                                       Page   :          1
Classification: External                                    Version:          2
Subject       : Vulnerability in "Workman"                  Date   :  31-Oct-96
===============================================================================

By courtesy of CERT Coordination Center we received the following information.

CERT Coordination Center advisory CA-96:23 reports a vulnerability
in WorkMan compact disc-playing program that affects UNIX System V Release 4.0
and derivatives and Linux systems.

When the program is installed set-user-id root, it can be used to make any
file on the system world-writable.

To address this problem, you should remove the set-user-id bit from the
program.

Note that this advisory is an update of CERT-NL advisory S-96-49 with
additional vendor-specific information.

CERT-NL advises to follow the recommendations provided.

Additional information with regards to this vulnerability is placed in
the advisory itself. You are encouraged to check on advisory updates regularly.
You can automate this process by using the CERT-NL notifier service.

All CERT Coordination Center advisories are mirrored by CERT-NL.
The specific URL for this case is:

<ftp://ftp.surfnet.nl/surfnet/net-security/cert-cc-mirror/
cert_advisories/CA-96.23.workman_vul>

More information about the CERT-NL mirror and notifier services is
contained in News items N-95-01 (notifier) and N-95-02 (CERT mirror),
both present on

<ftp://ftp.surfnet.nl/surfnet/net-security/cert-nl/docs/news/>

==============================================================================

CERT-NL is the Computer Emergency Response Team for SURFnet customers.
SURFnet is the Dutch network for educational, research and related institutes.
CERT-NL is a member of the Forum of Incident Response and Security Teams
(FIRST).

All CERT-NL material is available under:
  http://www.surfnet.nl/surfnet/security/cert-nl.html
  ftp://ftp.surfnet.nl/surfnet/net-security

In case of computer or network security problems please contact your
local CERT/security-team or CERT-NL  (if your institute is NOT a SURFnet
customer please address the appropriate (local) CERT/security-team).

CERT-NL is one/two hour(s) ahead of UTC (GMT) in winter/summer,
i.e. UTC+0100 in winter and UTC+0200 in summer (DST).
   Email:     cert-nl@surfnet.nl
   Phone:     +31 302 305 305
   Fax:       +31 302 305 329
   Snailmail: SURFnet bv
              Attn. CERT-NL
              P.O. Box 19035
              NL - 3501 DA  UTRECHT
              The Netherlands
   A 7 * 24 hours phone number is available to SURFnet SSC's and FIRST
   members on request.
==============================================================================

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