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/share/man/man4/mac_none.4

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  1.\" Copyright (c) 2002, 2003 Networks Associates Technology, Inc.
  2.\" All rights reserved.
  3.\"
  4.\" This software was developed for the FreeBSD Project by Chris Costello
  5.\" at Safeport Network Services and Network Associates Laboratories, the
  6.\" Security Research Division of Network Associates, Inc. under
  7.\" DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
  8.\" DARPA CHATS research program.
  9.\"
 10.\" Redistribution and use in source and binary forms, with or without
 11.\" modification, are permitted provided that the following conditions
 12.\" are met:
 13.\" 1. Redistributions of source code must retain the above copyright
 14.\"    notice, this list of conditions and the following disclaimer.
 15.\" 2. Redistributions in binary form must reproduce the above copyright
 16.\"    notice, this list of conditions and the following disclaimer in the
 17.\"    documentation and/or other materials provided with the distribution.
 18.\"
 19.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 22.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 29.\" SUCH DAMAGE.
 30.\"
 31.\" $FreeBSD$
 32.\"
 33.Dd December 1, 2002
 34.Dt MAC_NONE 4
 35.Os
 36.Sh NAME
 37.Nm mac_none
 38.Nd "null MAC policy module"
 39.Sh SYNOPSIS
 40To compile the null policy
 41into your kernel, place the following lines in your kernel
 42configuration file:
 43.Bd -ragged -offset indent
 44.Cd "options MAC"
 45.Cd "options MAC_NONE"
 46.Ed
 47.Pp
 48Alternately, to load the none module at boot time, place the following line
 49in your kernel configuration file:
 50.Bd -ragged -offset indent
 51.Cd "options MAC"
 52.Ed
 53.Pp
 54and in
 55.Xr loader.conf 5 :
 56.Bd -literal -offset indent
 57mac_none_load="YES"
 58.Ed
 59.Sh DESCRIPTION
 60The
 61.Nm
 62policy module implements a none MAC policy that has no effect on
 63access control in the system.
 64Unlike
 65.Xr mac_stub 4 ,
 66none of the MAC entry points are defined.
 67.Ss Label Format
 68No labels are defined for
 69.Nm .
 70.Sh SEE ALSO
 71.Xr mac 4 ,
 72.Xr mac_biba 4 ,
 73.Xr mac_bsdextended 4 ,
 74.Xr mac_ifoff 4 ,
 75.Xr mac_lomac 4 ,
 76.Xr mac_mls 4 ,
 77.Xr mac_partition 4 ,
 78.Xr mac_portacl 4 ,
 79.Xr mac_seeotheruids 4 ,
 80.Xr mac_stub 4 ,
 81.Xr mac_test 4 ,
 82.Xr mac 9
 83.Sh HISTORY
 84The
 85.Nm
 86policy module first appeared in
 87.Fx 5.0
 88and was developed by the
 89.Tn TrustedBSD
 90Project.
 91.Sh AUTHORS
 92This software was contributed to the
 93.Fx
 94Project by Network Associates Labs,
 95the Security Research Division of Network Associates
 96Inc.
 97under DARPA/SPAWAR contract N66001-01-C-8035
 98.Pq Dq CBOSS ,
 99as part of the DARPA CHATS research program.
100.Sh BUGS
101See
102.Xr mac 9
103concerning appropriateness for production use.
104The
105.Tn TrustedBSD
106MAC Framework is considered experimental in
107.Fx .
108.Pp
109While the MAC Framework design is intended to support the containment of
110the root user, not all attack channels are currently protected by entry
111point checks.
112As such, MAC Framework policies should not be relied on, in isolation,
113to protect against a malicious privileged user.