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             AUSCERT External Security Bulletin Redistribution

                        ESB-2006.0041 -- [Solaris]
        Security Vulnerability Using find(1) to Search "/proc" May
                 Cause a Denial of Service (DoS) Condition
                              13 January 2006

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

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

Publisher:         Sun Microsystems
Operating System:  Solaris 10
Impact:            Denial of Service
Access:            Existing Account

Original Bulletin: 
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102108-1

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Sun(sm) Alert Notification
     * Sun Alert ID: 102108
     * Synopsis: Security Vulnerability Using find(1) to Search "/proc"
       May Cause a Denial of Service (DoS) Condition
     * Category: Security
     * Product: Solaris 10 Operating System
     * BugIDs: 6291662
     * Avoidance: Patch
     * State: Resolved
     * Date Released: 11-Jan-2006
     * Date Closed: 11-Jan-2006
     * Date Modified: 

1. Impact

   A local unprivileged user running find(1) against the "/proc"
   filesystem may panic the system, creating a Denial of Service (DoS)
   condition.

2. Contributing Factors

   This issue can occur in the following releases:

   SPARC Platform
     * Solaris 10 without patch 118822-24

   x86 Platform
     * Solaris 10 without patch 118844-24

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

   This issue can occur when the find(1) command is run by an
   unprivileged user to search the "/proc" file system.

3. Symptoms

   The system will panic with a stack trace similar to the following:
    recursive rw_enter, lp=XXXXXXXXXXX wwwh=XXXXXXXXXXX thread=XXXXXXXXXXX
    vpanic()
    as_fault()
    pagefault()
    trap()
    ktl0()
    uiomove()
    gfs_readdir_emit_int()
    gfs_readdir_pred()
    pr_readdir_objectdir()
    getdents64()
    syscall_trap32()

   (where XXXXXXXXXXXX are hexadecimal numbers). 

4. Relief/Workaround

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

5. Resolution

   This issue is addressed in the following releases:

   SPARC Platform
     * Solaris 10 with patch 118822-24 or later

   x86 Platform
     * Solaris 10 with patch 118844-24 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 2000-2005 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved

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