#!/bin/sh -
#
#	@(#)security	5.3 (Berkeley) 5/28/91
# $FreeBSD: stable/2.2/etc/security 50952 1999-09-05 11:54:50Z peter $
#
PATH=/sbin:/bin:/usr/bin
LC_ALL=C; export LC_ALL

separator () {
	echo ""
	echo ""
}

host=`hostname`
echo "Subject: $host security check output"

LOG=/var/log
TMP=/var/run/_secure.$$

umask 027

echo "checking setuid files and devices:"

# don't have ncheck, but this does the equivalent of the commented out block.
# note that one of the original problem, the possibility of overrunning
# the args to ls, is still here...
#
MP=`mount -t ufs | grep -v " nosuid" | sed 's;/dev/;&r;' | awk '{ print $3 }'`
set $MP
while test $# -ge 1; do
	mount=$1
	shift
	find $mount -xdev -type f \
		\( -perm -u+x -or -perm -g+x -or -perm -o+x \) \
		\( -perm -u+s -or -perm -g+s \)  -print0
done | xargs -0 -n 20 ls -lTd | sort +9 > $TMP

if [ ! -f $LOG/setuid.today ] ; then
	separator
	echo "no $LOG/setuid.today"
	cp $TMP $LOG/setuid.today
fi
if cmp $LOG/setuid.today $TMP >/dev/null; then :; else
	separator
	echo "$host setuid diffs:"
	diff -b $LOG/setuid.today $TMP
	mv $LOG/setuid.today $LOG/setuid.yesterday
	mv $TMP $LOG/setuid.today
fi

separator
echo "checking for uids of 0:"
awk 'BEGIN {FS=":"} $3==0 {print $1,$3}' /etc/master.passwd

# show denied packets
if ipfw -a l 2>/dev/null | egrep "deny|reset|unreach" > $TMP; then
	if [ ! -f $LOG/ipfw.today ] ; then
		separator
		echo "no $LOG/ipfw.today"
		cp $TMP $LOG/ipfw.today
	fi
	if cmp $LOG/ipfw.today $TMP >/dev/null; then :; else
		separator
	        echo "$host denied packets:"
	        diff -b $LOG/ipfw.today $TMP | egrep "^>"
	        mv $LOG/ipfw.today $LOG/ipfw.yesterday
	        mv $TMP $LOG/ipfw.today
	fi
fi

# show kernel log messages
if dmesg 2>/dev/null > $TMP; then
	if [ ! -f $LOG/dmesg.today ] ; then
		separator
		echo "no $LOG/dmesg.today"
		cp $TMP $LOG/dmesg.today
	fi
	if cmp $LOG/dmesg.today $TMP >/dev/null 2>&1; then :; else
		separator
	        echo "$host kernel log messages:"
	        diff -b $LOG/dmesg.today $TMP | egrep "^>"
	        mv $LOG/dmesg.today $LOG/dmesg.yesterday
	        mv $TMP $LOG/dmesg.today
	fi
fi

# show login failures
separator
echo "$host login failures:"
grep -i "login failure" $LOG/messages

# show tcp_wrapper warning messages
separator
echo "$host refused connections:"
grep -i "refused connect" $LOG/messages

rm -f $TMP
