/usr/lib/tiger/scripts/check_tcpd is in tiger 1:3.2.3-8.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 | #!/bin/sh
#
# tiger - A UN*X security checking system
#
# Copyright (C) 2002 Javier Fernandez-Sanguino Peña
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# Please see the file `COPYING' for the complete copyright notice.
#
# check_tcpd - 26/05/2002
#
# Tests for the existance of tcp-wrappers and changes in their configuration
# it also determines which services are running wrapped in tcp-wrappers.
# (based on check_inetd)
#
# check_tcpd 10/19/2003 jfs Patch from Nicolas François which uses -f
# instead of -e in order to avoid Solaris problems.
# check_tcpd - 10/07/2003 - jfs - Remove temporary files
# check_tcpd - 08/11/2003 - jfs
# Check for the availability of TCPD and only run the checks on inetd
# if TCPD is available. Preliminary code for XINETD. Also check for
# the hosts.allow and hosts.deny file permissions.
# check_tcpd - 08/08/2003 - jfs
# Improved temporary file creation.
# check_tcpd - 06/26/2003 - jfs
# Fixed calls to test ([]) it worked in Linux but not in other OS due
# to -n not being implicit.
# check_tcpd - 04/23/2003 - jfs
# Fixed requirements
# check_tcpd - 08/09/2002 - jfs
# Added RM to dependancies.
# check_tcpd - 07/25/2002 - jfs
# Changed TigerInstallDir to .
#
#-----------------------------------------------------------------------------
# TODO:
#
# - This check should include checks on the _content_ of hosts.allow,
# and hosts.deny (notice that hosts.equiv is checked for in check_rhosts)
# - it is not currently able to determine services which are compiled
# against libwrap (many in Debian GNU/Linux) and tell the user that they
# are protected this way.
# - it only uses inetd (through GEN_INETD_SETS) but could be improved to
# use GEN_XINETD_SETS if available.
#
#-----------------------------------------------------------------------------
#
TigerInstallDir="/usr/lib/tiger"
#
# Set default base directory.
# Order or preference:
# -B option
# TIGERHOMEDIR environment variable
# TigerInstallDir installed location
#
basedir=${TIGERHOMEDIR:=$TigerInstallDir}
for parm
do
case $parm in
-B) basedir=$2; break;;
esac
done
#
# Verify that a config file exists there, and if it does
# source it.
#
[ ! -r $basedir/config ] && {
echo "--ERROR-- [init002e] No 'config' file in \`$basedir'."
exit 1
}
. $basedir/config
. $BASEDIR/initdefs
#
# If run in test mode (-t) this will verify that all required
# elements are set.
#
[ "$Tiger_TESTMODE" = 'Y' ] && {
haveallcmds SED AWK CAT GEN_INETD_SETS GREP JOIN LS SORT UNIQ RM || exit 1
haveallfiles BASEDIR WORKDIR INETDFILE || exit 1
echo "--CONFIG-- [init003c] $0: Configuration ok..."
exit 0
}
#------------------------------------------------------------------------
echo
echo "# Performing check of services with tcp wrappers..."
haveallcmds SED AWK CAT GEN_INETD_SETS GREP JOIN LS SORT UNIQ RM || exit 1
haveallfiles BASEDIR WORKDIR INETDFILE || exit 1
saveifs=$IFS
tmpservices=$WORKDIR/sec.$$ts
tmpinetd=$WORKDIR/sec.$$in
safe_temp $tmpservices $tmpinetd
trap 'delete $tmpservices $tmpinetd; exit 1' 1 2 3 15
checkinetd ()
{
infile=$1
$JOIN -o 1.1 2.6 1.6 1.7 $infile $INETDFILE > $WORKDIR/cinetd.$$
# TODO: This is not used (what do we need it for?) - jfs
__xx="`$LS -id \`$AWK '{print $3}' $WORKDIR/cinetd.$$ |
$GREP -v internal
\` 2>/dev/null |
$SORT |
$UNIQ -c |
$SORT -rn |
$SED -e '1q'`"
set x $__xx
count="$2"
size="$3"
# tcpdpath="$4"
# Tcp-wrappers patch is configured in the systems configuration files
tcpdpath=$TCPD
# [ "$count" -lt 2 ] && tcpdpath=
$GREP -v '^#' $infile | grep -v '^$' |
while read currservice s p t user currbinary parm1 parms
do
if [ "$currbinary" = "$tcpdpath" ] ; then
message INFO inet015i "" "Service $currservice is using tcp wrappers."
fi
done
$CAT $WORKDIR/cinetd.$$ |
while read service exppath currpath callpath
do
if [ -n "`echo $currpath | $GREP '?'`" ]; then
currpath=`echo $currpath | $SED -e "s/\?//"`
fi
if [ -n "`echo $exppath | $GREP '?'`" ]; then
exppath=`echo $exppath | $SED -e "s/\?//"`
fi
if [ "$currpath" = "$tcpdpath" -a "$currpath" != "$exppath" ] ; then
message INFO inet014i "" "Service $service has been modified to run under tcp wrappers."
fi
if [ "$currpath" != "$exppath" -a "$exppath" != "$tcpath" ]; then
message FAIL inet016f "" "Service $service which was previously protected by tcpwrappers is now using $currpath (instead of $exppath)."
fi
done
delete $WORKDIR/cinetd.$$
}
check_hfileperm()
{
for __file
do
getpermit $__file |
while read _namefile _owner _group ur uw ux gr gw gx or ow ox suid sgid stk
do
[ "$gw" != '0' ] && \
message WARN inet023w "" "The file $__file can be written by any user of the group $_group."
[ "$ow" != '0' ] && \
message FAIL inet024f "" "The file $__file can be written by any user."
[ "$_owner" != 'root' ] && \
message FAIL inet025f "" "The file $__file is not owned by root (owned by $owner)."
done
done
}
realpath="$REALPATH -d"
[ ! -n "$REALPATH" -o ! $TESTEXEC "$REALPATH" ] && realpath="echo"
[ -z "$TCPD" -o ! $TESTEXEC "$TCPD" ] && \
message FAIL inet021f "" "Tcp wrappers does not seem to be installed in this system."
if [ -z "$HOSTALLOW" -o ! -f "$HOSTALLOW" ] ; then
message FAIL inet022f "" "The hosts.allow file used by Tcp wrappers does not seem to be present in this system"
else
check_hfileperm $HOSTALLOW
fi
if [ -z "$HOSTDENY" -o ! -f "$HOSTDENY" ] ; then
message FAIL inet022f "" "The hosts.deny file used by Tcp wrappers does not seem to be present in this system"
else
check_hfileperm $HOSTDENY
fi
# This piece of code compares the current inetd configuration with the
# configuration under $OS/$REL/$ARCH/inetd file (which is also generated
# with gen_inetd_sets)
haveallcmds GEN_INETD_SETS UNIQ &&
haveallfiles INETDFILE && {
$GEN_INETD_SETS |
while read inetd_set
do
inetdsrc=`$CAT $inetd_set.src`
echo "# Analysing inetd entries from $inetdsrc"
checkinetd $inetd_set
delete $inetd_set $inetd_set.src
done
}
# Enable when GEN_XINETD_SETS is available
#
#haveallcmds GEN_XINETD_SETS UNIQ TCPD &&
#haveallfiles XINETDFILE && {
# $GEN_XINETD_SETS |
# while read xinetd_set
# do
# inetdsrc=`$CAT $xinetd_set.src`
# echo "# Analysing xinetd entries from $xinetdsrc"
#
# checkinetd $xinetd_set
# delete $xinetd_set $xinetd_set.src
# done
# }
delete $tmpservices $tmpinetd
exit 0
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