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             AUSCERT External Security Bulletin Redistribution

                        ESB-2009.0090 -- [Solaris]
       Security Vulnerability in the Solaris Pseudo-terminal Driver
                    (pty(7D)) may Cause a System Panic
                              27 January 2009

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

Product:              Pseudo-terminal Driver
Publisher:            Sun Microsystems
Operating System:     Solaris
                      OpenSolaris
Impact:               Denial of Service
Access:               Existing Account

Original Bulletin:    
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-249586-1

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   Solution Type: Sun Alert

   Solution  249586 :   Security Vulnerability in the Solaris
   Pseudo-terminal Driver (pty(7D)) may Cause a System Panic          

   Bug ID: 6433954

   Product
   Solaris 8 Operating System
   Solaris 9 Operating System
   Solaris 10 Operating System
   OpenSolaris

   Date of Resolved Release: 22-Jan-2009

   SA Document Body
   Security vulnerability in the Solaris Pseudo-terminal driver (pty(7D)) 
   may cause a system panic:

   1. Impact

   A race condition security vulnerability in the Solaris pseudo-terminal
   driver (pty(7D)) module may allow a local unprivileged user to panic
   the system causing a Denial of Service (DoS).

   2. Contributing Factors

   This issue can occur in the following releases:
   SPARC Platform
     * Solaris 8 without patch 113685-07
     * Solaris 9 without patch 140426-01
     * Solaris 10 without patch 140383-01
     * OpenSolaris based upon builds snv_01 through snv_102

   x86 Platform
     * Solaris 8 without patch 113686-06
     * Solaris 9 without patch 140427-01
     * Solaris 10 without patch 140384-01
     * OpenSolaris based upon builds snv_01 through snv_102

   Note: 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 the described issue occurs, the system will panic with a stack
   trace similar to the following:
    panic: BAD TRAP: occurred in module "unix" due to a NULL pointer 
    dereference
    unix:die()
    unix:trap()
    unix:ktl0()
    unix:putnext()
    genunix:strdoioctl()
    genunix:strioctl()
    ptc:ptcioctl()
    genunix:fop_ioctl()
    genunix:ioctl()

   4. Workaround

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

   5. Resolution

   This issue is addressed in the following releases:
   SPARC Platform
     * Solaris 8 with patch 113685-07 or later
     * Solaris 9 with patch 140426-01 or later
     * Solaris 10 with patch 140383-01 or later
     * OpenSolaris based upon builds snv_103 or later

   x86 Platform
     * Solaris 8 with patch 113686-06 or later
     * Solaris 9 with patch 140427-01 or later
     * Solaris 10 with patch 140384-01 or later
     * 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 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved

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