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AUSCERT External Security Bulletin Redistribution
ESB-2008.0205 -- [Solaris]
Security Vulnerability in the Solaris 10 DTrace Dynamic Tracing Framework
May Allow Unauthorized Kernel Level Tracing
27 February 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: DTrace
Publisher: Sun Microsystems
Operating System: Solaris 10
Impact: Access Privileged Data
Access Confidential Data
Inappropriate Access
Access: Existing Account
CVE Names: CVE-2008-0938
Original Bulletin:
http://sunsolve.sun.com/search/document.do?assetkey=1-66-231803-1
Revision History: February 27 2008: Added Bulletin URL.
February 27 2008: Added CVE Number.
February 25 2008: Initial Release
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Solution Type Sun Alert
Solution 231803: Security Vulnerability in the Solaris 10 DTrace
Dynamic Tracing Framework May Allow Unauthorized Kernel Level Tracing
Bug ID: 6458281
Product: Solaris 10 Operating System
SA Document Body
Security Vulnerability in the Solaris 10 DTrace Dynamic Tracing
Framework May Allow Unauthorized Kernel Level Tracing
1. Impact
A security vulnerability in the Solaris 10 DTrace (see dtrace(1M))
dynamic tracing framework may allow a local user or a non-global
zone which has been granted either the PRIV_DTRACE_USER or the
PRIV_DTRACE_PROC privilege (see privileges(5)) to be able to
perform some kernel-level tracing. Such users may then be able
to access sensitive information.
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform:
* Solaris 10 without patch 120011-04
x86 Platform:
* Solaris 10 without patch 120012-04
Note: Solaris 8 and Solaris 9 are not affected by this issue.
3. Symptoms
There are no predictable symptoms that would indicate the described
issue has been exploited to view sensitive kernel data.
4. Workaround
If users have been granted any of the DTrace privileges, those
privileges can be removed until the patches have been applied.
The additional privileges may have been configured via policy.conf(4)
or user_attr(4). If the privileges have been configured directly
in the local "/etc/user_attr" file, they can be removed (as
"root" user) with the usermod(1M) utility as in the following
example:
# usermod -K limitpriv=all,!dtrace_user,!dtrace_proc user
If non-global zones have been granted any of these privileges,
they can be removed with zonecfg(1M) as in the following example:
# zonecfg -z <zone name>
zonecfg:<zone-name> set limitpriv="default"
zonecfg:<zone-name> commit
zonecfg:<zone-name> exit
In order for this change to take effect, reboot the zone after
the zone configuration is changed.
Note: Privileges may also be assigned via an execution profile
(see exec_attr(4)) or even to running processes using ppriv(1).
5. Resolution
This issue is addressed in the following releases:
SPARC Platform:
* Solaris 10 with patch 120011-04 or later
x86 Platform:
* Solaris 10 with patch 120012-04 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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