Give users the ability to load a mac_bsdextended(4) ruleset on boot (defaults
to NO of course). Provide a basic ruleset file, rc.bsdextended, but allow the filename to be overridden through rc.conf. Discussed with: rwatson (awhile ago)
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trhodes
parent
d0514db4ed
commit
2bf857d4fd
@ -468,6 +468,9 @@ performance_throttle_state="HIGH" # Online throttling state
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economy_cx_lowest="LOW" # Offline CPU idle state
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economy_throttle_state="HIGH" # Offline throttling state
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virecover_enable="YES" # Perform housekeeping for the vi(1) editor
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ugidfw_enable="NO" # Load mac_bsdextended(1) rules on boot
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bsdextended_script="/etc/rc.bsdextended" # Default mac_bsdextended(4)
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# ruleset file.
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##############################################################
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### Jail Configuration #######################################
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158
etc/rc.bsdextended
Normal file
158
etc/rc.bsdextended
Normal file
@ -0,0 +1,158 @@
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#!/bin/sh
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#
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# Copyright (c) 2004 Tom Rhodes
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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####
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# Sample startup policy for the mac_bsdextended(4) security module.
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#
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# Suck in the system configuration variables.
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####
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if [ -z "${source_rc_confs_defined}" ]; then
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if [ -r /etc/defaults/rc.conf ]; then
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. /etc/defaults/rc.conf
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source_rc_confs
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elif [ -r /etc/rc.conf ]; then
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. /etc/rc.conf
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fi
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fi
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####
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# Set ugidfw(8) to CMD:
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####
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CMD=/usr/sbin/ugidfw
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####
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# WARNING: recommended reading is the handbook's MAC
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# chapter and the ugidfw(8)
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# manual page. You can lock yourself out of the system
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# very quickly by setting incorrect values here.
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####
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####
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# Set the value of 'x' to system users. This would be nice but it
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# does not get the \n proper. Work around is used below.
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#x=`awk -F: '($3 >= 1001) && ($3 != 65534) { print $1 }' /etc/passwd`;
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#l=`awk -F: '($3 >= 1001) && ($3 != 65534) { print $3 }' /etc/passwd`;
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####
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####
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# Build a generic list of rules here, these should be
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# modified before using this script.
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# ugidfw add 1 subject uid USER1 object uid USER2 mode n
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# ugidfw add 2 subject gid USER1 object gid USER2 mode n
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#
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# For apache to read user files, the ruleadd must give
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# it permissions by default.
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####
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${CMD} add subject uid 80 object not uid 80 mode rxws;
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${CMD} add subject gid 80 object not gid 80 mode rxws;
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####
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# majordomo compat:
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#${CMD} add subject uid 54 object not uid 54 mode rxws;
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${CMD} add subject gid 26 object gid 54 mode rxws;
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####
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# This is for root:
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${CMD} add subject uid 0 object not uid 0 mode arxws;
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${CMD} add subject gid 0 object not gid 0 mode arxws;
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####
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# And for mailnull:
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${CMD} add subject uid 26 object not uid 26 mode rxws;
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${CMD} add subject gid 26 object not gid 26 mode rxws;
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####
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# And for majordomo:
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${CMD} add subject uid 54 object not uid 54 mode rxws;
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${CMD} add subject gid 54 object not gid 54 mode rxws;
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####
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# And for bin:
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${CMD} add subject uid 3 object not uid 3 mode rxws;
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${CMD} add subject gid 7 object not gid 7 mode rxws;
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####
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# And for mail/pop:
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${CMD} add subject uid 68 object not uid 68 mode rxws;
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${CMD} add subject gid 6 object not gid 6 mode arxws;
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####
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# And for smmsp:
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${CMD} add subject uid 25 object not uid 25 mode rxws;
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${CMD} add subject gid 25 object not gid 25 mode rxws;
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####
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# And for mailnull:
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${CMD} add subject uid 26 object not uid 26 mode rxws;
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${CMD} add subject gid 26 object not gid 26 mode rxws;
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####
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# For cyrus:
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${CMD} add subject uid 60 object not uid 60 mode rxws;
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${CMD} add subject gid 60 object not gid 60 mode rxws;
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####
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# For stunnel:
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${CMD} add subject uid 1018 object not uid 1018 mode rxws;
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${CMD} add subject gid 1018 object not gid 1018 mode rxws;
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####
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# For the nobody account:
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${CMD} add subject uid 65534 object not uid 65534 mode rxws;
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${CMD} add subject gid 65534 object not gid 65534 mode rxws;
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####
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# NOTICE: The next script adds a rule to allow
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# access their mailbox which is owned by GID `6'.
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# Removing this will give mailbox lock issues.
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for x in `awk -F: '($3 >= 1001) && ($3 != 65534) { print $1 }' /etc/passwd`;
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do ${CMD} add subject uid $x object gid 6 mode arwxs;
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done;
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####
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# Work around majordomo problem where gid is `4'.
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for x in `awk -F: '($3 >= 1001) && ($3 != 65534) { print $1 }' /etc/passwd`;
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do ${CMD} add subject uid $x object gid 4 mode arwxs;
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done;
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####
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# Use some script to get a list of users and
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# add all users to mode n for all other users. This
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# will isolate all users from other user home directories while
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# permitting them to use commands and browse the system.
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for x in `awk -F: '($3 >= 1001) && ($3 != 65534) { print $1 }' /etc/passwd`;
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do ${CMD} add subject not uid $x object uid $x mode n;
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done;
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###
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# Do the same thing but only for group ids in place of
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# user IDs.
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for x in `awk -F: '($3 >= 1001) && ($3 != 65534) { print $3 }' /etc/passwd`;
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do ${CMD} add subject not gid $x object uid $x mode n;
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done;
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@ -34,7 +34,7 @@ FILES= DAEMON LOGIN NETWORKING SERVERS \
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serial sppp sshd swap1 \
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syscons sysctl syslogd \
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timed tmp \
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usbd \
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ugidfw usbd \
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var vinum virecover \
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watchdogd \
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ypbind yppasswdd ypserv \
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52
etc/rc.d/ugidfw
Normal file
52
etc/rc.d/ugidfw
Normal file
@ -0,0 +1,52 @@
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#!/bin/sh
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#
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# $FreeBSD$
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# PROVIDE: ugidfw
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# REQUIRE:
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# BEFORE: LOGIN
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# KEYWORD: FreeBSD nojail
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. /etc/rc.subr
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name="ugidfw"
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rcvar="ugidfw_enable"
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start_cmd="ugidfw_start"
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start_precmd="ugidfw_precmd"
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stop_cmd="ugidfw_stop"
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ugidfw_precmd()
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{
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if ! sysctl security.mac.bsdextended
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then kldload mac_bsdextended
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if [ "$?" -ne "0" ]
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then warn Unable to load the mac_bsdextended module.
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return 1
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else
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return 0
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fi
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fi
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return 0
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}
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ugidfw_start()
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{
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# set the default policy script if none was specified
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[ -z "${bsdextended_script}" ] && bsdextended_script=/etc/rc.bsdextended
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if [ -r "${bsdextended_script}" ]; then
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. "${bsdextended_script}"
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echo -n 'MAC bsdextended rules loaded sucessfully.'
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fi
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echo '.'
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}
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ugidfw_stop()
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{
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# Disable the policy
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#
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kldunload mac_bsdextended
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}
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load_rc_config $name
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run_rc_command "$1"
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