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                                   CERT-Renater

                        Note d'Information No. 2009/VULN032
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DATE                      : 26/01/2009

HARDWARE PLATFORM(S)      : Sun UltraSPARC T2 and T2+.

OPERATING SYSTEM(S)       : OpenSolaris.

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http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-250066-1
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   Solution Type: Sun Alert

   Solution  250066 :   A Solaris Kernel Security Vulnerability on
   Systems Using the Sun UltraSPARC T2 and T2+ Processors May Allow
   Denial of Service (DoS)

   Bug ID: 6762012

   Product
   OpenSolaris

   Date of Resolved Release: 21-Jan-2009

   SA Document Body

   A Solaris Kernel Security Vulnerability on Systems Using the Sun
   UltraSPARC T2 and T2+ Processors May Allow Denial of Service (DoS)

   1. Impact

   A security vulnerability in the sun4v kernel for Sun UltraSPARC T2 and
   UltraSPARC T2+ systems may allow a local unprivileged user to panic
   the system, which is a type of Denial of Service (DoS).

   2. Contributing Factors

   This issue can occur in the following releases:

   SPARC Platform
     * OpenSolaris based upon builds snv_100 through snv_102
   for Sun UltraSPARC T2 and UltraSPARC T2+ systems.

   Notes:

   1. Solaris 8 and 9 do not support the Sun UltraSPARC T2 or UltraSPARC
   T2+ processor and thus are not impacted by this issue.

   2. Solaris 10 is not impacted by this issue.

   3. This issue only affects systems with a Sun UltraSPARC T2 or
   UltraSPARC T2+ processor and therefore does not affect the x86
   platform.

   To determine if a system has either a Sun UltraSPARC T2 or UltraSPARC
   T2+ processor, the following command can be run:
   $ modinfo | grep SUNW,UltraSPARC-T2

   If output is returned similiar to the following:
   3  12c3d40   5450   -   0  SUNW,UltraSPARC-T2 ()

   or:
   4  121c460   6520   -   0  SUNW,UltraSPARC-T2+ ()

   then the system has a Sun UltraSPARC T2 or UltraSPARC T2+ processor.

   3. Symptoms

   If the described issue occurs, the system may panic with a stack trace
   similar to the following:
   panic[cpu16]/thread=30005406e80: bad stack overflow at TL 1
   hat_memload_array_region()
   segvn_fault_vnodepages()
   segvn_fault()
   as_fault()
   pagefault()
   trap()
   utl0()

   4. Workaround

   There is no workaround for this issue. Please see the Resolution
   section below.

   5. Resolution

   This issue is addressed in the following release:
   SPARC Platform
     * OpenSolaris based upon builds snv_103 or later

   For more information on Security Sun Alerts, see Technical
   Instruction ID 213557.

   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 2000-2009 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved

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          Les serveurs de référence du CERT-Renater
          http://www.urec.fr/securite
          http://www.cru.fr/securite
          http://www.renater.fr
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          + 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     +
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