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                                   CERT-Renater

                        Note d'Information No. 2008/VULN525
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DATE                      : 17/11/2008

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Solaris 10, OpenSolaris running ocket(3SOCKET)
                                              function.

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http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-242806-1
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   Solution Type: Sun Alert

   Solution  242806 :   A Security Vulnerability in the Solaris
   Socket(3SOCKET) Function May Allow Unprivileged Users to Panic the
   System
   Bug ID: 6708602

   Product

   Solaris 10 Operating System
   OpenSolaris

   Date of Resolved Release: 13-Nov-2008

   Security vulnerability in the Solaris socket(3SOCKET) function:

   1. Impact

   Due to a security vulnerability in the socket(3SOCKET) function,
   Solaris systems without InfiniBand hardware, may allow an unprivileged
   local user to panic the system and thereby cause a denial of service
   (DoS).

   2. Contributing Factors

   This issue can occur in the following releases:
   SPARC Platform

     * Solaris 10 with patch 127127-11 and without patch 137137-05
     * OpenSolaris based upon builds snv_57 through  snv_91

   x86 Platform

     * Solaris 10 with patch 127128-11 and without patch 137138-05
     * OpenSolaris based upon builds snv_57 through  snv_91

   Note 1: Note: Solaris 8 and Solaris 9 are not impacted by this issue.

   Note 2: This issue only occurs on systems which do NOT have InfiniBand
   hardware.

   To determine if a system has InfiniBand hardware installed, execute
   the following command:

    # prtconf -D | egrep '(tavor|arbel|hermon)'

   If  a system has InfiniBand hardware, the output of the above command
   will be similar to the following:

    pci15b3,5a44, instance #0 (driver name: tavor)

   Note 3: OpenSolaris distributions may include additional bug fixes
   above and beyond the build from which it was derived.

   To determine the base build of  OpenSolaris, the following command can
   be used:

    $ uname -v
    snv_86

   3. Symptoms

   If this issue is exploited to cause a denial of service (DoS), the
   kernel panics with a stack trace similar to the following:

    panic[cpu1]/thread=fffffffecbd65020:
    recursive mutex_enter, lp=ffffffff0fb28d50 owner=fffffffecbd65020
    thread=fffffffecbd65020
    ffffff0004ddcc70 unix:mutex_panic+73 ()
    ffffff0004ddcce0 unix:mutex_vector_enter+1a9 ()
    ffffff0004ddcd50 sockfs:socksdpv_close+143 ()
    ffffff0004ddcdc0 genunix:fop_close+64 ()
    ffffff0004ddce00 genunix:closef+56 ()
    ffffff0004ddcea0 genunix:closeandsetf+458 ()
    ffffff0004ddcec0 genunix:close+14 ()
    ffffff0004ddcf10 unix:brand_sys_syscall32+1a3 ()

   The key identifying features of the panic is the "recursive
   mutex_enter" message and the presence of
   "socksdpv_close()" in the stack trace.

   4. Workaround

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

   Note: Backing out the affected patches to resolve this issue is not
   advised since these kernel patches deliver many other security fixes
   that are required to protect your system.

   5. Resolution

   This issue is resolved in the following releases:
   SPARC Platform
     * Solaris 10 with patch 137137-05 or later
     * OpenSolaris based upon builds snv_92 or later

   x86 Platform
     * Solaris 10 with patch 137138-05 or later
     * OpenSolaris based upon builds snv_92 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
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   YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
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   OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
   This Sun Alert notification contains Sun proprietary and confidential
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   Copyright 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved

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