132 lines
5.0 KiB
Groff
132 lines
5.0 KiB
Groff
|
.\" Copyright (c) 2003 Networks Associates Technology, Inc.
|
||
|
|
.\" All rights reserved.
|
||
|
|
.\"
|
||
|
|
.\" This software was developed for the FreeBSD Project by Chris Costello
|
||
|
|
.\" at Safeport Network Services and Network Associates Labs, the
|
||
|
|
.\" Security Research Division of Network Associates, Inc. under
|
||
|
|
.\" DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
|
||
|
|
.\" DARPA CHATS research program.
|
||
|
|
.\"
|
||
|
|
.\" Redistribution and use in source and binary forms, with or without
|
||
|
|
.\" modification, are permitted provided that the following conditions
|
||
|
|
.\" are met:
|
||
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer.
|
||
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
||
|
|
.\" documentation and/or other materials provided with the distribution.
|
||
|
|
.\"
|
||
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
|
||
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
.\" SUCH DAMAGE.
|
||
|
|
.\"
|
||
|
|
.\" $FreeBSD$
|
||
|
|
.Dd JANUARY 8, 2003
|
||
|
|
.Os
|
||
|
|
.Dt MAC 4
|
||
|
|
.Sh NAME
|
||
|
|
.Nm mac
|
||
|
|
.Nd Mandatory Access Control
|
||
|
|
.Sh SYNOPSIS
|
||
|
|
.Cd "options MAC"
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
.Ss Introduction
|
||
|
|
The Mandatory Access Control, or MAC, framework allows administrators to
|
||
|
|
finely control system security by providing for a loadable security policy
|
||
|
|
architecture.
|
||
|
|
It is important to note that due to its nature, MAC security policies may
|
||
|
|
only further restrict security; they cannot override traditional UNIX
|
||
|
|
security provisions such as file permissions and superuser checks.
|
||
|
|
.Pp
|
||
|
|
Currently, the following MAC policy modules are shipped with
|
||
|
|
.Fx :
|
||
|
|
.Bl -column ".Xr mac_seeotheruids 4" "low-watermark mac policy" ".Em Labeling" "boot only"
|
||
|
|
.It Em Name Ta Em Description Ta Em Labeling Ta Em "Load time"
|
||
|
|
.It Xr mac_biba 4 Ta "Biba integrity policy" Ta yes Ta boot only
|
||
|
|
.It Xr mac_bsdextended 4 Ta "File system firewall" Ta no Ta any time
|
||
|
|
.It Xr mac_ifoff 4 Ta "Interface silencing" Ta no Ta any time
|
||
|
|
.It Xr mac_lomac 4 Ta "Low-Watermark MAC policy" Ta yes Ta boot only
|
||
|
|
.It Xr mac_mls 4 Ta "Confidentiality policy" Ta yes Ta boot only
|
||
|
|
.It Xr mac_none 4 Ta "Sample no-op policy" Ta no Ta any time
|
||
|
|
.It Xr mac_partition 4 Ta "Process partition policy" Ta yes Ta any time
|
||
|
|
.It Xr mac_seeotheruids 4 Ta "See-other-UIDs policy" Ta no Ta any time
|
||
|
|
.It Xr mac_test 4 Ta "MAC testing policy" Ta no Ta any time
|
||
|
|
.El
|
||
|
|
.Ss MAC Labels
|
||
|
|
Each system subject (processes, sockets, etc.) and each system object
|
||
|
|
(file system objects, sockets, etc.) can carry with it a MAC label.
|
||
|
|
MAC labels can contain data in an arbitrary format
|
||
|
|
used by the MAC policies in order to help determine how to determine
|
||
|
|
access rights for a given operation.
|
||
|
|
Most MAC labels on system subjects and objects
|
||
|
|
can be modified directly or indirectly by the system
|
||
|
|
administrator.
|
||
|
|
More information on the format for MAC labels can be found in the
|
||
|
|
.Xr maclabel 7
|
||
|
|
man page.
|
||
|
|
.Ss Setting MAC labels
|
||
|
|
From the command line, each type of system object has its own way of setting
|
||
|
|
and modifying its MAC policy label.
|
||
|
|
.Bl -column "user login process" "Xr login.conf 5" -offset indent
|
||
|
|
.It Em "Subject/Object" Ta Em "Utility"
|
||
|
|
.It "File system object" Ta Xr setfmac 8
|
||
|
|
.It "Network interface" Ta Xr ifconfig 8
|
||
|
|
.It "TTY (by login class)" Ta Xr login.conf 5
|
||
|
|
.It "User (by login class)" Ta Xr login.conf 5
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
Additionally, the
|
||
|
|
.Xr setpmac 8
|
||
|
|
command can be used to run a command with a different process label than
|
||
|
|
the shell's current label.
|
||
|
|
.Ss Programming With MAC
|
||
|
|
MAC security enforcement itself is transparent to application
|
||
|
|
programs, with the exception that some programs may need to be aware of
|
||
|
|
additional
|
||
|
|
.Xr errno 2
|
||
|
|
returns from various system calls.
|
||
|
|
.Pp
|
||
|
|
The interface for retrieving, handling, and setting policy labels
|
||
|
|
is documented in the
|
||
|
|
.Xr mac 3
|
||
|
|
man page.
|
||
|
|
.Sh SEE ALSO
|
||
|
|
.Xr mac 3 ,
|
||
|
|
.Xr mac_biba 4 ,
|
||
|
|
.Xr mac_bsdextended 4 ,
|
||
|
|
.Xr mac_ifoff 4 ,
|
||
|
|
.Xr mac_lomac 4 ,
|
||
|
|
.Xr mac_mls 4 ,
|
||
|
|
.Xr mac_none 4 ,
|
||
|
|
.Xr mac_partition 4 ,
|
||
|
|
.Xr mac_seeotheruids 4 ,
|
||
|
|
.Xr mac_test 4 ,
|
||
|
|
.Xr login.5 ,
|
||
|
|
.Xr maclabel 7 ,
|
||
|
|
.Xr getfmac 8 ,
|
||
|
|
.Xr setfmac 8 ,
|
||
|
|
.Xr getpmac 8 ,
|
||
|
|
.Xr setpmac 8 ,
|
||
|
|
.Xr mac 9
|
||
|
|
.Sh HISTORY
|
||
|
|
The
|
||
|
|
.Nm
|
||
|
|
implementation first appeared in
|
||
|
|
.Fx 5.0
|
||
|
|
and was developed by the TrustedBSD Project.
|
||
|
|
.Sh AUTHORS
|
||
|
|
This software was contributed to the
|
||
|
|
.Fx
|
||
|
|
Project by Network Associates Labs,
|
||
|
|
the Security Research Division of Network Associates
|
||
|
|
Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
|
||
|
|
as part of the DARPA CHATS research program.
|