Category
Security
Release Phase
Resolved
Bug Id
6458281
ProductSolaris 10 Operating System
Date of Resolved Release18-Feb-2008
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 1009886.1.
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Copyright 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved.Modification History
28-Apr-2008: Updated Resolution section to add link for Security Technical Instruction doc
References
120011-04
120012-04
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