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AUSCERT External Security Bulletin Redistribution
ESB-2007.0585 -- [Solaris]
Solaris 10 Systems May Panic or Hang When Running Certain DTrace D Programs
3 August 2007
AusCERT Security Bulletin Summary
Publisher: Sun Microsystems
Operating System: Solaris 10
Impact: Denial of Service
Access: Existing Account
Comment: Note that this is not a security issue unless untrusted users
have been granted the PRIV_DTRACE_USER privilege, which is
not granted by default.
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Sun(sm) Alert Notification
* Sun Alert ID: 103021
* Synopsis: Solaris 10 Systems May Panic or Hang When Running
Certain DTrace D Programs
* Category: Security
* Product: Solaris 10 Operating System
* BugIDs: 6479756
* Avoidance: Patch, Workaround
* State: Resolved
* Date Released: 30-Jul-2007
* Date Closed: 30-Jul-2007
* Date Modified:
A security vulnerability in the DTrace (see dtrace(1M)) dynamic
tracing framework may allow a local user who has privileges to run
certain DTrace programs to cause the system to panic or become
unresponsive. This is a type of Denial of Service (DoS). The minimum
privilege required is the PRIV_DTRACE_USER privilege (see
2. Contributing Factors
This issue can occur in the following releases:
* Solaris 10 without patch 125100-10
* Solaris 10 without patch 125101-10
Note: This issue does not affect Solaris 8 or Solaris 9.
If this issue is encountered on a SPARC system, especially those based
on the UltraSPARC T1 processor, the system will typically panic with
an error message of "send mondo timeout".
It is unlikely for this issue to occur on x86 based systems but if it
does occur the system will appear to be either hung or extremely slow.
If users have been granted any of the DTrace privileges then 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, then they can be removed using the
usermod(1M) utility as shown:
# usermod -K limitpriv=all,!dtrace_user,!dtrace_proc,!dtrace_kernel user
Note: Privileges may also be assigned via an execution profile (see
exec_attr(4)) or even to running processes using ppriv(1).
This issue is addressed in the following releases:
* Solaris 10 with patch 125100-10 or later
* Solaris 10 with patch 125101-10 or later
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
notification may only be used for the purposes contemplated by these
Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved.
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