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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 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 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.