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AUSCERT External Security Bulletin Redistribution
ESB-2008.0614 -- [Solaris]
Kernel Security Vulnerability on Solaris Systems Using the Sun UltraSPARC
T2 and UltraSPARC T2+ Processors May Allow Denial of Service (DoS)
20 June 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: kernel
Publisher: Sun Microsystems
Operating System: Solaris
Impact: Denial of Service
Access: Existing Account
CVE Names: CVE-2008-2708
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-238688-1
Revision History: June 20 2008: Corrected CVE number
June 20 2008: Added CVE Reference
June 13 2008: Initial Release
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Solution Type: Sun Alert
Solution 238688 : Kernel Security Vulnerability on Solaris Systems
Using the Sun UltraSPARC T2 and UltraSPARC T2+ Processors May Allow
Denial of Service (DoS)
Bug ID: 6673119
Product
Solaris 10 Operating System,
OpenSolaris
Date of Resolved Release: 11-Jun-2008
SA Document Body
Kernel Security Vulnerability on Solaris Systems Using the Sun UltraSPARC T2
and UltraSPARC T2+ Processors May Allow Denial of Service (DoS)
1. Impact
A security vulnerability in the processor specific kernel module for
Sun UltraSPARC T2 and UltraSPARC T2+ systems 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
* Solaris 10 without patch 137111-01
* OpenSolaris based upon builds snv_64 through snv_92
for Sun UltraSPARC T2 and UltraSPARC T2+ systems.
Notes:
1. Solaris 8 and 9 do not support the Sun UltraSPARC T2 or UltraSPARC
T2+ processor and thus are not impacted by this issue.
2. This issue only affects systems with a Sun UltraSPARC T2 or
UltraSPARC T2+ processor and therefore does not affect the x86
platform.
To determine if a system has either a Sun UltraSPARC T2 or UltraSPARC
T2+ processor, the following command can be run:
$ modinfo | grep SUNW,UltraSPARC-T2
If output such as:
3 12c3d40 5450 - 0 SUNW,UltraSPARC-T2 ()
or:
4 121c460 6520 - 0 SUNW,UltraSPARC-T2+ ()
is seen, then the system has a Sun UltraSPARC T2 or UltraSPARC T2+
processor.
3. Symptoms
If the described issue occurs, the system may panic with a stack
strace similar to the following:
panicsys()
vpanic()
panic()
die(0
trap()
ktl0()
kcopy_nta()
uiomove()
writerp()
nfs3_write()
vnext_write()
port_fop_write()
vhead_write()
fop_write()
vn_rdwr()
core_write()
elf32core()
do_core()
core()
psig()
post_syscall()
syscall_trap32()
4. Workaround
To prevent this issue from occurring until patches can be applied, the
system-wide core file options can be modified to disable core dumps
using coreadm(1M) as in the following example:
# coreadm -d process -d global -d global-setid -d proc-setid
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 10 with patch 137111-01 or later
* OpenSolaris based upon builds snv_93 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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