rc.bsdextended revision 135912 
1#!/bin/sh
2#
3# Copyright (c) 2004  Tom Rhodes
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9# 1. Redistributions of source code must retain the above copyright
10#    notice, this list of conditions and the following disclaimer.
11# 2. Redistributions in binary form must reproduce the above copyright
12#    notice, this list of conditions and the following disclaimer in the
13#    documentation and/or other materials provided with the distribution.
14#
15# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25# SUCH DAMAGE.
26#
27# $FreeBSD: head/etc/rc.bsdextended 135912 2004-09-29 00:12:28Z trhodes $
28#
29
30####
31# Sample startup policy for the mac_bsdextended(4) security module.
32#
33# Suck in the system configuration variables.
34####
35if [ -z "${source_rc_confs_defined}" ]; then
36        if [ -r /etc/defaults/rc.conf ]; then
37                . /etc/defaults/rc.conf
38                source_rc_confs
39        elif [ -r /etc/rc.conf ]; then
40                . /etc/rc.conf
41        fi
42fi
43
44####
45# Set ugidfw(8) to CMD:
46####
47CMD=/usr/sbin/ugidfw
48
49####
50# WARNING: recommended reading is the handbook's MAC
51# chapter and the ugidfw(8)
52# manual page.  You can lock yourself out of the system
53# very quickly by setting incorrect values here.
54####
55
56####
57# Set the value of 'x' to system users.  This would be nice but it
58# does not get the \n proper.  Work around is used below.
59#x=`awk -F: '($3 >= 1001) && ($3 != 65534) { print $1 }' /etc/passwd`;
60#l=`awk -F: '($3 >= 1001) && ($3 != 65534) { print $3 }' /etc/passwd`;
61####
62
63####
64# Build a generic list of rules here, these should be
65# modified before using this script.
66# ugidfw add 1 subject uid USER1 object uid USER2 mode n
67# ugidfw add 2 subject gid USER1 object gid USER2 mode n
68#
69# For apache to read user files, the ruleadd must give
70# it permissions by default.
71####
72${CMD} add subject uid 80 object not uid 80 mode rxws;
73${CMD} add subject gid 80 object not gid 80 mode rxws;
74
75####
76# majordomo compat:
77#${CMD} add subject uid 54 object not uid 54 mode rxws;
78${CMD} add subject gid 26 object gid 54 mode rxws;
79
80####
81# This is for root:
82${CMD} add subject uid 0 object not uid 0 mode arxws;
83${CMD} add subject gid 0 object not gid 0 mode arxws;
84
85####
86# And for mailnull:
87${CMD} add subject uid 26 object not uid 26 mode rxws;
88${CMD} add subject gid 26 object not gid 26 mode rxws;
89
90####
91# And for majordomo:
92${CMD} add subject uid 54 object not uid 54 mode rxws;
93${CMD} add subject gid 54 object not gid 54 mode rxws;
94
95####
96# And for bin:
97${CMD} add subject uid 3 object not uid 3 mode rxws;
98${CMD} add subject gid 7 object not gid 7 mode rxws;
99
100####
101# And for mail/pop:
102${CMD} add subject uid 68 object not uid 68 mode rxws;
103${CMD} add subject gid 6 object not gid 6 mode arxws;
104
105####
106# And for smmsp:
107${CMD} add subject uid 25 object not uid 25 mode rxws;
108${CMD} add subject gid 25 object not gid 25 mode rxws;
109
110####
111# And for mailnull:
112${CMD} add subject uid 26 object not uid 26 mode rxws;
113${CMD} add subject gid 26 object not gid 26 mode rxws;
114
115####
116# For cyrus:
117${CMD} add subject uid 60 object not uid 60 mode rxws;
118${CMD} add subject gid 60 object not gid 60 mode rxws;
119
120####
121# For stunnel:
122${CMD} add subject uid 1018 object not uid 1018 mode rxws;
123${CMD} add subject gid 1018 object not gid 1018 mode rxws;
124
125####
126# For the nobody account:
127${CMD} add subject uid 65534 object not uid 65534 mode rxws;
128${CMD} add subject gid 65534 object not gid 65534 mode rxws;
129
130####
131# NOTICE: The next script adds a rule to allow
132#	 access their mailbox which is owned by GID `6'.
133#	 Removing this will give mailbox lock issues.
134for x in `awk -F: '($3 >= 1001) && ($3 != 65534) { print $1 }' /etc/passwd`;
135    do ${CMD} add subject uid $x object gid 6 mode arwxs;
136done;
137
138####
139# Work around majordomo problem where gid is `4'.
140for x in `awk -F: '($3 >= 1001) && ($3 != 65534) { print $1 }' /etc/passwd`;
141    do ${CMD} add subject uid $x object gid 4 mode arwxs;
142done;
143
144####
145# Use some script to get a list of users and
146# add all users to mode n for all other users.  This
147# will isolate all users from other user home directories while
148# permitting them to use commands and browse the system.
149for x in `awk -F: '($3 >= 1001) && ($3 != 65534) { print $1 }' /etc/passwd`;
150    do ${CMD} add subject not uid $x object uid $x mode n;
151done;
152
153###
154# Do the same thing but only for group ids in place of
155# user IDs.
156for x in `awk -F: '($3 >= 1001) && ($3 != 65534) { print $3 }' /etc/passwd`;
157    do ${CMD} add subject not gid $x object uid $x mode n;
158done;
159