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AUSCERT External Security Bulletin Redistribution
ESB-2008.0781 -- [Solaris]
Security Vulnerabilities in the Solaris Priority Inherited pthread mutex
API May Result in a Denial of Service (DoS) Condition
11 August 2008
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AusCERT Security Bulletin Summary
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Product: pthread mutex API
Publisher: Sun Microsystems
Operating System: Solaris
Impact: Denial of Service
Access: Existing Account
CVE Names: CVE-2008-3549
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-239387-1
Revision History: August 11 2008: Added CVE
August 7 2008: Initial Release
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Solution Type: Sun Alert
Solution 239387 : Security Vulnerabilities in the Solaris Priority
Inherited pthread mutex API May Result in a Denial of Service (DoS)
Condition
Bug ID: 6688233
Product
Solaris 10 Operating System
OpenSolaris
Date of Resolved Release: 05-Aug-2008
SA Document Body
Due to a security vulnerability in Solaris (see below for full details)
1. Impact
Due to a security vulnerability in Solaris, usage of the
pthread_mutex_reltimedlock_np(3C) API by a local unprivileged user
or by an application, when the API is used in a particular way, can
cause the system to hang or, if the deadman feature is enabled, to
panic.
This leads to a Denial of Service (DoS) condition.
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 10 without patch 137111-04
* OpenSolaris based upon builds snv_01 through snv_89
x86 Platform
* Solaris 10 without patch 137112-04
* OpenSolaris based upon builds snv_01 through snv_89
Notes: Solaris 8 and Solaris 9 are not impacted by this issue.
If the deadman feature is enabled on a system, the kernel variable
"snooping" will have a value of one (1). To determine the value of
the "snooping" kernel variable, run the following command:
# echo "snooping/X" | mdb -k
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 -a
SunOS phys-node-1 5.11 snv_86 i86pc i386 i86pc
3. Symptoms
If the described issue occurs, the system will hang.
On a system with deadman enabled the system will panic with
the message:
deadman: timed out after 50 seconds of clock inactivity
In both cases a crash dump will reveal that there are one or
more threads running on the cpu with the following stack:
genunix:thread_lock_high+44()
genunix:turnstile_pi_waive+11()
genunix:turnstile_wakeup+57()
unix:mutex_vector_exit+5()
genunix:turnstile_block+404()
genunix:lwp_upimutex_lock+154()
genunix:lwp_mutex_timedlock+5e5()
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 10 with patch 137111-04 or later
* OpenSolaris based upon builds snv_90 or later
x86 Platform
* Solaris 10 with patch 137112-04 or later
* OpenSolaris based upon builds snv_90 or later
For more information on Security Sun Alerts, see Technical Instruction
ID 213557:
http://sunsolve.sun.com/search/document.do?assetkey=1-61-213557-1
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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