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ESB-2009.1369 - [Solaris] kernel: Denial of service - Existing account

Date: 05 October 2009

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1369
Solaris 10 Kernel Update Patches 141414-09/-10 and 141415-09/-10 May Cause
       a System Panic, Which May Be Misdiagnosed as a Hardware Fault
                              5 October 2009

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

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

Product:           kernel
Publisher:         Sun Microsystems
Operating System:  Solaris
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Mitigation

Original Bulletin: 
   http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-268728-1

- --------------------------BEGIN INCLUDED TEXT--------------------

Solution Type: Sun Alert
Solution  268728 :   Solaris 10 Kernel Update Patches 141414-09/-10
and 141415-09/-10 May Cause a System Panic, Which May Be
Misdiagnosed as a Hardware Fault          
Bug ID: 6872520

Product:
Solaris 10 Operating System

Date of Workaround Release: 01-Oct-2009

SA Document Body
Solaris 10 Kernel Update Patches 141414-09/-10 and 141415-09/-10 May Cause a 
System Panic, Which May Be Misdiagnosed as a Hardware Fault


1. Impact
A race condition introduced in the IP squeue handling code in Solaris
10 kernel patches 141414-09/-10 (SPARC) and 141415-09/-10 (x86)
may cause a BAD TRAP panic. Analysis of the resulting crash dump may
appear to suggest a CPU fault (this is not the case) and may prompt
unnecessary hardware replacement.

2. Contributing Factors
This issue can occur in the following releases:
SPARC platform
  * Solaris 10 with patches 141414-09 or 141414-10

x86 platform
  * Solaris 10 with patches 141415-09 or 141415-10

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

3. Symptoms
If the issue described occurs, the system will panic with a stack
similar to the following:
BAD TRAP: type=31 rp=2a1029d3710 addr=1b0 mmu_fsr=0 occurred in module 
"genunix" due to a NULL pointer dereference
thread_lock+0x34()
thread_affinity_set+0x38()
squeue_bind+0x30()
squeue_worker+0xa4()
thread_start+4()


4. Workaround
To work around the described issue, place the following line in
'/etc/system' and reboot:

set ip:ip_squeue_bind = 0

Note: This workaround may affect system performance.
If a reboot cannot be performed immediately, run the following command
as root:
# ndd -set /dev/ip ip_squeue_bind 0


5. Resolution
A final resolution is pending completion.


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 2000-2009 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
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                AusCERT personnel answer during Queensland business hours
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                On call after hours for member emergencies only.
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