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AUSCERT External Security Bulletin Redistribution
ESB-2008.0204 -- [Solaris]
Two Security Vulnerabilities Exist Within the cpc(3CPC)
Sub-System of the Solaris Kernel
27 February 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: Kernel
Publisher: Sun Microsystems
Operating System: Solaris 10
Impact: Denial of Service
Access: Existing Account
CVE Names: CVE-2008-0933
Original Bulletin:
http://sunsolve.sun.com/search/document.do?assetkey=1-66-231466-1
Revision History: February 27 2008: Added CVE Number.
February 25 2008: Initial Release
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Solution Type Sun Alert
Solution 231466: Two Security Vulnerabilities Exist Within the
cpc(3CPC) Sub-System of the Solaris Kernel
Bug ID: 6398097, 6542909
Product: Solaris 10 Operating System
Date of Resolved Release: 14-Feb-2008
SA Document Body
Two Security Vulnerabilities Exist Within the cpc(3CPC) Sub-System
of the Solaris Kernel
1. Impact
Two security vulnerabilities, both due to separate race conditions
within the CPU Performance Counters (cpc(3CPC)) sub-system of
the Solaris kernel, may allow a local unprivileged user to panic
the system causing a Denial of Service (DoS) condition.
2. Contributing Factors
These issues can occur in the following releases:
SPARC Platform:
* Solaris 10 without patch 127111-08
x86 Platform:
* Solaris 10 without patch 127112-08
Note: These issues do not affect the Solaris 8 and Solaris 9
Operating Systems.
3. Symptoms
If the described issues occur, the system may panic with strings
similar to one of the following:
For BugID 6398097: Panic in kcpc_unbind():
1. First, execute the following command:
# echo "::status !grep panic" |mdb unix.0 vmcore.0
the output should show a BAD TRAP panic message similar to
the following:
BAD TRAP: type=34 rp=2a100f9d7c0
addr=baddcafebaddcb06 mmu_fsr=0
2. Then execute the following command:
# echo "*panic_thread::findstack !grep kcpc_unbind"|mdb unix.0 vmcore.0
the output should show the kcpc_unbind function displayed,
as in the following example:
000002a100f9d061 kcpc_unbind+0x28()
For BugID 6542909: race condition between kcpc_restore() and
kcpc_unbind():
1. First, execute the following command:
# echo "::status !grep panic" |mdb unix.0 vmcore.0
the output should have a pcbe reference, as in the following example:
panic message: us_pcbe: bad config on token 327c55dcf38
2. Then execute the following command:
# echo "*panic_thread::findstack !grep restorectx" |mdb unix.0 vmcore.0
the output should show the restorectx function displayed, as
in the following example:
000002a101b4d001 restorectx+0x24()
Note: by default, crashdumps are written to /var/crash/<uname -n>. See
dumpadm(1M) for more information.
4. Workaround
There is no workaround for these issue. Please see the Resolution
section below.
5. Resolution
These issues are addressed in the following releases:
SPARC Platform:
* Solaris 10 with patch 127111-08 or later
x86 Platform:
* Solaris 10 with patch 127112-08 or later
For more information on Security Sun Alerts, see Sun Infodoc
91209.
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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