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AUSCERT External Security Bulletin Redistribution
ESB-2009.1209
Security Vulnerability in the Solaris Kernel Involving the Interaction of
the Filesystem and Virtual Memory Subsystems
20 August 2009
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AusCERT Security Bulletin Summary
---------------------------------
Publisher: Sun Microsystems
Operating System: Solaris
OpenSolaris
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2009-2857
Original Bulletin:
http://sunsolve.sun.com/search/document.do?assetkey=1-66-257848-1
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Solution Type Sun Alert
Solution 257848 : Security Vulnerability in the Solaris Kernel
Involving the Interaction of the Filesystem and Virtual Memory
Subsystems
Bug ID
1246893
Product
Solaris 8 Operating System
Solaris 9 Operating System
Solaris 10 Operating System
OpenSolaris
Date of Resolved Release
17-Aug-2009
SA Document Body
Security Vulnerability in the Solaris Kernel Involving the Interaction of
the Filesystem and Virtual Memory Subsystems
1. Impact
A security vulnerability in the Solaris kernel related to the
interaction of the filesystem and virtual memory subsystems may allow
a local unprivileged user to cause the system to slow down and
eventually cease operating, thereby resulting in a Denial of Service
(DoS).
2. Contributing Factors
SPARC Platform:
* Solaris 8 without patch 127721-02
* Solaris 9 without patch 122300-41
* Solaris 10 without patch 139555-08
* OpenSolaris based upon builds snv_01 through snv_102
x86 Platform:
* Solaris 8 without patch 127722-02
* Solaris 9 without patch 122301-41
* Solaris 10 without patch 139556-08
* OpenSolaris based upon builds snv_01 through snv_102
Note: Solaris 8 entered EOSL Phase 2 on 1 April 2009. Entitlement to
patches developed on or after 1 April 2009 requires the purchase of
the Solaris 8 Vintage Patch Service. See Note in section 5 for more
details.
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 -v
snv_101
3. Symptoms
If this issue is exploited to cause a Denial of Service (DoS), the
system may slow down gradually and eventually stop all activities.
When using the ps(1) command to examine the process information, the
ps(1) command may never complete, and it may not be possible to
terminate it with the kill(1) command or an interrupt signal (normally
mapped to 'Ctrl+C' on the keyboard). There may be a kernel thread
stuck on a page lock indicated through a stack similar to the
following (this could be seen, for example, using a kernel debugger
such as mdb(1)):
page_lock_es()
[......]
pagefault()
trap()
ktl0()
xcopyin( )
uiomove ( )
[......]
write( )
Note that while CR#1246893 exhibits the symptom described as above,
this symptom may not be unique to this bug.
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:
* Solaris 8 with patch 127721-02 or later
* Solaris 9 with patch 122300-41 or later
* Solaris 10 with patch 139555-08 or later
* OpenSolaris based upon builds snv_103 or later
x86 Platform:
* Solaris 8 with patch 127722-02 or later
* Solaris 9 with patch 122301-41 or later
* Solaris 10 with patch 139556-08 or later
* OpenSolaris based upon builds snv_103 or later
Note: The READMEs of Solaris 8 patches developed on or after 1 April
2009 are available to all customers however Solaris 8 entered EOSL
Phase 2 on April 1, 2009 and thus entitlement for these patches,
including those that fix security vulnerabilities, requires the
purchase of the Solaris 8 Vintage Patch Service. More information
about the Solaris 8 Vintage Patch Service is available at:
http://www.sun.com/service/eosl/Solaris8.html
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.
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