=====================================================================
                                    CERT-Renater

                         Note d'Information No. 2006/VULN114
_____________________________________________________________________

DATE                      : 29/03/2006

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Solaris 8, Solaris 9.

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

Sun(sm) Alert Notification
      * Sun Alert ID: 102215
      * Synopsis: Security Vulnerability With The "/usr/ucb/ps" Command
      * Category: Security
      * Product: Solaris 9 Operating System, Solaris 8 Operating System
      * BugIDs: 4798073
      * Avoidance: Patch, Workaround
      * State: Resolved
      * Date Released: 27-Mar-2006
      * Date Closed: 27-Mar-2006
      * Date Modified:

1. Impact

    A security vulnerability in the "/usr/ucb/ps" (see ps(1B)) command may
    allow unprivileged local users the ability to see environment
    variables and their values for processes which belong to other users.

2. Contributing Factors

    This issue can occur in the following releases:

    SPARC Platform
      * Solaris 8 without patch 109023-05
      * Solaris 9 without patch 120240-01

    x86 Platform
      * Solaris 8 without patch 109024-05
      * Solaris 9 without patch 120239-01

    Note 1: Solaris 10 is not affected by this issue.

    Note 2: The ps(1m) command is used for reporting process status. The
    full path for this command is "/usr/bin/ps". In addition, there is
    "/usr/ucb/ps" which is documented in the ps(1b) manual page. Only the
    "/usr/ucb/ps" command is affected by the vulnerability described in
    this Sun Alert.

    In general users will use the "/usr/bin/ps" version as most will not
    have the directory "/usr/ucb" in their command search path (see the
    appropriate PATH section of relevant shell manual pages).

3. Symptoms

    As an unprivileged user, running the "/usr/ucb/ps axe" command shows
    all processes, and with the "e" flags, it also includes their
    environment.
     $ /usr/ucb/ps axe
     PID TT       S  TIME COMMAND
     ...
     53 ?        S  0:00 /usr/lib/devfsadm/devfseventd LD_LIBRARY_PATH= PATH=/sb
in:
     /usr/sbin:/usr/bin TZ=GB-Eire _INIT_PREV_LEVEL=0
     ...

    In the example above we can see a root owned daemon, along with its
    environment variables and their values.

4. Relief/Workaround

    To work around the described issue, remove the set-id bit from
    "/usr/ucb/ps".

5. Resolution

    This issue is addressed in the following releases:

    SPARC Platform
      * Solaris 8 with patch 109023-05 or later
      * Solaris 9 with patch 120240-01 or later

    x86 Platform
      * Solaris 8 with patch 109024-05 or later
      * Solaris 9 with patch 120239-01 or later

    This Sun Alert notification is being provided to you on an "AS IS"
    basis. This Sun Alert notification may contain information provided by
    third parties. The issues described in this Sun Alert notification may
    or may not impact your system(s). Sun makes no representations,
    warranties, or guarantees as to the information contained herein. ANY
    AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
    WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
    NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
    YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
    INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
    OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
    This Sun Alert notification contains Sun proprietary and confidential
    information. It is being provided to you pursuant to the provisions of
    your agreement to purchase services from Sun, or, if you do not have
    such an agreement, the Sun.com Terms of Use. This Sun Alert
    notification may only be used for the purposes contemplated by these
    agreements.

    Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
    Clara, CA 95054 U.S.A. All rights reserved

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

           =========================================================
           Les serveurs de référence du CERT-Renater
           http://www.urec.fr/securite
           http://www.cru.fr/securite
           http://www.renater.fr
           =========================================================
           + CERT-RENATER          | tel : 01-53-94-20-44          +
           + 151 bd de l'Hopital   | fax : 01-53-94-20-41          +
           + 75013 Paris           | email: certsvp@renater.fr     +
           =========================================================