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             AUSCERT External Security Bulletin Redistribution

                        ESB-2006.0581 -- [Solaris]
  On Solaris 10 a System Panic may Result due to a Race Condition Between
              netstat(1M) (or snmp queries) and ifconfig(1M)
                              1 February 2007

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

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

Product:              netstat and ifconfig
Publisher:            Sun Microsystems
Operating System:     Solaris 10
Impact:               Denial of Service
Access:               Existing Account

Revision History:  February  1 2007: Patches now available
                   November 20 2006: Preliminary patch available.
                   August   14 2006: Initial Release

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Sun(sm) Alert Notification
     * Sun Alert ID: 102569
     * Synopsis: On Solaris 10 a System Panic Due to a Race Condition May
       OccurWhen SNMP Queries are Processed (such as when netstat(1M) or
       ifconfig(1M) are run)
     * Category: Security, Availability
     * Product: Solaris 10 Operating System
     * BugIDs: 6450585
     * Avoidance: Patch
     * State: Resolved
     * Date Released: 11-Aug-2006, 11-Jan-2007, 30-Jan-2007
     * Date Closed: 30-Jan-2007
     * Date Modified: 14-Nov-2006, 11-Jan-2007, 30-Jan-2007

1. Impact

   A local or remote unprivileged user may be able to trigger a race
   condition in the kernel and panic a system with certain SNMP requests.
   A local unprivileged user may be able to trigger the same race
   condition and panic a local system using certain invocations of
   ifconfig(1M) or netstat(1M).

2. Contributing Factors

   This issue can occur in the following releases:

   SPARC Platform
     * Solaris 10 with patch 118833-04 through 118833-32 and without
       patch 118833-33

   x86 Platform
     * Solaris 10 with patch 118855-03 through 118855-32 and without
       patch 118855-33

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

3. Symptoms

   A panic string and stack backtrace similar to the following:
  udp_snmp_get+0x100(3012541a658, 0, ...
  snmpcom_req+0x33c(3012541a658, 300c12929c0, ...
  ip_snmpmod_wput+0xe4(3012541a658, 300c12929c0, ...
  putnext+0x218(3012541a750, 3012541a658, ...
  snmpcom_req+0x368(3012ef12668, 300c12929c0, ...
  icmp_wput_other+0x10c(3012ef12668, 300c12929c0, ...
  qdrain_syncq+0x74(3012ef126d0, 3012ef12668, ...
  drain_syncq+0x2e8(300fc1e01a0, 30124f34520, ...
  outer_exit+0x8c(300bd9f7ef0, 300fc1e01a0, ...
  qattach+0x144(3016d0a8d50, 2a1063bf758, ...
  strioctl+0x1aa4(300fc1f5ca8, 0, ...
  spec_ioctl+0x8c(2c00000315, 5302, ...
  fop_ioctl+0x20(3032dccfd80, 5302, ...
  ioctl+0x184(3, 3016fd2c290, 2073c, ...
  syscall_trap32+0xcc(3, 5302, ... 

4. Relief/Workaround

   There is no workaround. Please see Resolution section below.

5. Resolution

   This issue is addressed in the following releases:

   SPARC Platform
     * Solaris 10 with patch 118833-33 or later

   x86 Platform
     * Solaris 10 with patch 118855-33 or later

Change History

   14-Nov-2006:
     * Updated Relief/Workaround section

   11-Jan-2007:
     * Modified Synopsis, Impact and Relief/Workaround sections

   30-Jan-2007:
     * State: Resolved
     * Updated Contributing Factors and Resolution sections

   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 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved

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