/usr/lib/tiger/scripts/check_listeningprocs is in tiger 1:3.2.3-10.
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 | #!/bin/sh
#
# tiger - A UN*X security checking system
# Copyright (C) 2000, 2001 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_listeningprocs - 08/23/2001
#
# check_listeningprocs - 08/23/2001 - jfs
# Removed netstat (the Linux file has it) since the different
# UNIX implementations do not shared command line parameters
# (lsof does)
# check_listeningprocs - 04/17/2003 - jfs
# Use safe delete() instead of RM
# check_listeningprocs - 08/08/2003 - jfs
# Improved temporary file creation.
# check_listeningprocs - 09/19/2003 - jfs
# Allow empty okprocess and okprocessuser with the patch
# provided by Nicolas François
# check_listeningprocs - 05/15/2005 - jfs
# Proper check for processes in loopback (Debian Bug #307695)
#
# TODO:
# - provide a way (based on the Linux version) to work with Netstat's
# output (in Solaris -t or -u does not work and -p does not show processes
# but net tables)
# - the 'case' statements probably need to be introduced into an 'eval'
# (this bug was reported for Debian GNU/Linux) in order for multiple
# ValidUsers/ValidProcs to work ok. Check systems/Linux/2/check_listeningprocs
# (once it has been tested it will be included here too)
#
# NOTES:
#
# - there are know problems related to services open TCP/UDP ports spuriously
# to contact the outside world. Tiger cannot distinguish these from
# normal servers. These usually happens with servers (DNS, Samba, Squid,
# Qmail) that open UDP listeners to receive DNS requests (this is Debian
# bug #136991)
#
# To avoid these false positives you can either:
# 1.- add these processes to the list of valid processes in the tigerrc
# configuration file (Tiger_Listening_ValidProcs)
#
# 2.- use the ignore mechanism (new in 3.2), for example, if you get reports
# like this one:
# WARN The process `X' is listening on socket 35477 (UDP) on every interface.
# with the number of the socket varying everytime add an ignore
# entry in the tiger.ignore configuration file with:
# 'The process `X' is listening on socket [0-9]+ (UDP) on every interface.'
#
#-----------------------------------------------------------------------------
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 CAT CUT GREP AWK SORT UNIQ LSOF || exit 1
# Lsof is needed for this program since netstat does not work
# the same across all Unix platforms
haveallfiles BASEDIR WORKDIR || exit 1
haveallvars TESTLINK HOSTNAME
message CONFIG init003c "" "$0: Configuration ok..."
exit 0
}
#------------------------------------------------------------------------
echo
echo "# Checking listening processes "
haveallcmds CAT LSOF GREP CUT AWK SORT UNIQ || exit 1
haveallfiles BASEDIR WORKDIR || exit 1
okprocessusers=${Tiger_Listening_ValidUsers-"root"}
okprocess=${Tiger_Listening_ValidProcs-""}
safe_temp "$WORKDIR/procs.$$" "$WORKDIR/openprocs.$$"
trap 'delete $WORKDIR/procs.$$ $WORKDIR/openprocs.$$ ; exit 1' 1 2 3 15
check_socket()
{
proc=$1
user=$2
type=$3
asocket=$4
socket=`echo $asocket | $CUT -f 2 -d : | $SED -e 's/-.*$//'`
[ "$type" = "raw" ] && socket="(hex) $socket"
address=`echo $asocket | $CUT -f 1 -d :`
[ "$address" = "127.0.0.1" ] && address="loopback"
[ "$address" = "0.0.0.0" -o "$address" = "00000000" -o "$address" = "*" ] && address="every"
# Should address = 127.0.0.1 be considered harmful?
# TODO: This could be an option
case $proc in
$okprocess)
;;
*)
case $user in
$okprocessuser)
[ "$address" = "every" -a "$Tiger_Listening_Every" != "N" ] && \
message WARN lin002i "" "The process \`$proc' is listening on socket $socket ($type) on $address interface." || \
message INFO lin002i "" "The process \`$proc' is listening on socket $socket ($type) on $address interface."
;;
*)
[ "$address" != "loopback" ] && {
message WARN lin003w "" "The process \`$proc' is listening on socket $socket ($type on $address interface) is run by $user."
}
;;
esac
;;
esac
}
$LSOF -n > $WORKDIR/procs.$$
$CAT $WORKDIR/procs.$$ | $GREP "IPv" |
$GREP -v "\->" |
$AWK '{printf("%s %s %s %s\n", $1, $3, $7, $8)}' >> $WORKDIR/openprocs.$$
# Now check for raw sockets (some trojans use them too)
$CAT $WORKDIR/procs.$$ | $GREP "raw" |
$AWK '{printf("%s %s %s %s\n", $1, $3, $5, $7)}' >> $WORKDIR/openprocs.$$
$CAT $WORKDIR/openprocs.$$ |
$SORT | $UNIQ |
while read proc user type asocket
do
check_socket $proc $user $type $asocket
done
delete $WORKDIR/procs.$$ $WORKDIR/openprocs.$$
exit 0
|