Operating System:

[Solaris]

Published:

27 February 2008

Protect yourself against future threats.

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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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