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             AUSCERT External Security Bulletin Redistribution

                        ESB-2009.0054 -- [Solaris]
        Security Vulnerability Relating to the posix_fallocate(3C)
             System Call May Lead to a Denial of Service (DoS)
                              20 January 2009

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

Product:              OpenSolaris
Publisher:            Sun Microsystems
Operating System:     Solaris
Impact:               Denial of Service
Access:               Existing Account
CVE Names:            CVE-2009-0131 CVE-2009-0132

Original Bulletin:    
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-239188-1

Revision History:     January 20 2009: Added CVEs
                      January 15 2009: Initial Release

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   Solution Type: Sun Alert
   Solution  239188 :   Security Vulnerability Relating to the
   posix_fallocate(3C) System Call May Lead to a Denial of Service (DoS)          
   Bug ID: 6669199

   Product
   OpenSolaris

   Date of Resolved Release: 13-Jan-2008

   SA Document Body
   Security Vulnerability Relating to the posix_fallocate(3C) System Call 
   May Lead to a Denial of Service (DoS)

   1. Impact
   A security vulnerability relating to the posix_fallocate(3C) system
   call 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_29 through snv_90

   x86 Platform:
     * OpenSolaris based upon builds snv_29 through snv_90

   Note: Solaris 8, 9 and 10 are not impacted by this issue
   OpenSolaris distributions may include additional bug fixes above and
   beyond the build from which it was derived. The base build can be
   derived as follows:
   $ uname -a
   SunOS  phys-node-1 5.11 snv_86 i86pc i386 i86pc

   3. Symptoms
   When this issue occurs, the system will produce a panic message
   similar to the following:
   panic[cpu12]/thread=30018c432e0: ufs_putapage: bn == UFS_HOLE

   with a stack trace similar to the following:
    vpanic()
    real_panic_v()
    ufs_fault_v()
    ufs_fault()
    ufs_putapage()
    pvn_vplist_dirty()
    ufs_putpages()
    fop_putpage()
    ufs_syncip()
    ufs_flush_inode()
    ufs_scan_inodes()
    ufs_flush()
    ufs__fiolfs()
    allocsp_wlockfs()
    ufs_allocsp()
    ufs_space()
    fop_space()
    fcntl()
    syscall_trap32()

   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:
     * OpenSolaris based upon builds snv_91 or later

   x86 Platform:
     * OpenSolaris based upon builds snv_91 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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