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ESB-2008.0047 -- [Solaris] -- A Security Vulnerability in libdevinfo(3LIB) May Allow Unauthorized Access to Files on the System

Date: 14 January 2008
References: ESB-2008.0657  

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             AUSCERT External Security Bulletin Redistribution

                        ESB-2008.0047 -- [Solaris]
          A Security Vulnerability in libdevinfo(3LIB) May Allow
                Unauthorized Access to Files on the System
                              14 January 2008

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

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              libdevinfo(3LIB)
Publisher:            Sun Microsystems
Operating System:     Solaris 10
Impact:               Increased Privileges
Access:               Existing Account

Original Bulletin:    
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-103165-1

Comment: Solaris 8 and Solaris 9 Operating systems are not affected by this
         issue.

- --------------------------BEGIN INCLUDED TEXT--------------------

Sun(sm) Alert Notification
     * Sun Alert ID: 103165
     * Synopsis: A Security Vulnerability in libdevinfo(3LIB) May Allow
       Unauthorized Access to Files on the System
     * Category: Security
     * Product: Solaris 10 Operating System
     * BugIDs: 6605707
     * Avoidance: Patch, Workaround
     * State: Resolved
     * Date Released: 11-Jan-2008
     * Date Closed: 11-Jan-2008
     * Date Modified: 

1. Impact

   A security vulnerability in the libdevinfo(3LIB) library, which is
   used by the login(1) command, may allow a local unprivileged user to
   gain unauthorized access to files on the system, possibly including
   system files. This vulnerability could therefore be used to gain
   elevated privileges on the system.

2. Contributing Factors

   This issue can occur in the following releases:

   SPARC Platform
     * Solaris 10 with patch 118833-04 or later and without patch
       125251-02

   x86 Platform
     * Solaris 10 with patch 118855-03 or later and without patch
       125252-02

   Note: Solaris 8 and Solaris 9 Operating systems are not affected by
   this issue.

3. Symptoms

   There are no reliable symptoms that would indicate the described issue
   has been exploited. 

4. Relief/Workaround

   To work around this issue, edit "/etc/logindevperm" and replace all
   the "dev" entries in the 3rd column by "^dev$" as in the following
   example:
    /dev/console    0600    /^dev$/mouse:/^dev$/kbd
    /dev/console    0600    /^dev$/sound/*          # audio devices
    [...]

   This change has no negative impact.

5. Resolution

   This issue is addressed in the following releases:

   SPARC Platform
     * Solaris 10 with patch 125251-02 or later

   x86 Platform
     * Solaris 10 with patch 125252-02 or later

   For more information on Security Sun Alerts, see Sun Infodoc 91209.

   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

- --------------------------END INCLUDED TEXT--------------------

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This security bulletin is provided as a service to AusCERT's members.  As
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from the author's website to ensure that the information is still current.

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        http://www.auscert.org.au/render.html?cid=1980

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any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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