/usr/lib/tiger/scripts/check_rhosts 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.
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#
# tiger - A UN*X security checking system
# Copyright (C) 1993 Douglas Lee Schales, David K. Hess, David R. Safford
#
# 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_rhosts - 06/14/93
#
# Checks rhosts files in order to see if user's configuration leaves the
# system open to attack.
#
# 05/14/2005 jfs Patch from Nicolas François which prints a warning
# for any host in .rhost
# 03/31/2005 jfs Printout rhosts accesses
# 10/19/2003 jfs Patch from Nicolas François which uses -f instead of -e
# in order to avoid Solaris problems. And also adds TESTLINK HOSTNAME
# 08/14/2003 jfs Added OUTPUTMETHOD to dependancies
# 08/12/2003 jfs Added check for existance, permissions and owner of
# rhosts files (permissions are redundant, however)
# 08/08/2003 jfs Improved temporary file creation.
# 07/25/2002 jfs Added a sanity check for password files
# 04/28/93 dls Added '-L' option to 'ls' to get the permissions from the
# file instead of the symbolic link.
# Complain if the .rhosts is a symbolic link or directory.
#
#-----------------------------------------------------------------------------
#
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 AWK CAT EXPR GEN_PASSWD_SETS HEAD JOIN LS RM SED OUTPUTMETHOD || exit 1
haveallfiles BASEDIR WORKDIR || exit 1
haveallvars TESTLINK HOSTNAME || exit 1
echo "--CONFIG-- [init003c] $0: Configuration ok..."
exit 0
}
#------------------------------------------------------------------------
echo
echo "# Performing check of /etc/hosts.equiv and .rhosts files..."
haveallcmds AWK CAT EXPR GEN_PASSWD_SETS HEAD JOIN LS RM SED OUTPUTMETHOD || exit 1
haveallfiles BASEDIR WORKDIR || exit 1
haveallvars TESTLINK HOSTNAME || exit 1
safe_temp "$WORKDIR/home.hosts.$$" "$WORKDIR/pass.list.$$"
trap 'delete $WORKDIR/home.hosts.$$ $WORKDIR/pass.list.$$ ; exit 1' 1 2 3 15
check_entry()
{
user="$1"
rhost="$2"
ruser="$3"
plus=0
if [ "$rhost" = '+' ]; then
if [ "$user" = '+' ]; then
message FAIL rcmd001f "" "User $user's .rhosts file has a '+ +' entry."
else
message FAIL rcmd002f "" "User $user's .rhosts file has a '+' for host field."
fi
fi
if [ -n "$RHOST_SITES" ]; then
note=1
eval case "$rhost" in $rhostcase esac
[ $note = 1 ] && {
message WARN rcmd003w "" "User $user's .rhosts file has host \`$rhost'."
}
else
message WARN rcmd003w "" "User $user's .rhosts file provides access for user \`$ruser' at host \`$rhost'."
fi
if [ "$rhost" != '+' -a "$ruser" = '+' ]; then
message WARN rcmd004w "" "User $user's .rhosts file has a '+' for user (host $rhost)."
elif [ ! -n "$ruser" ]; then
message INFO rcmd005i "" "User $user's .rhosts file has empty user field for host \`$rhost'."
fi
# Linux allows comments in rhosts files
[ "$OS" != "Linux" ] &&
case "$rhost" in
'#'*) {
message WARN rcmd013w "" "User $user's .rhosts file contains an attempted comment line"
}
;;
esac
}
scan_file()
{
user="$1"
file="$2"
# added #+@_ which should be valid characters.
$AWK '/^[#\+@_a-zA-Z0-9\.\-\\\t ]*$/ {print}' < "$file" |
{
while read rhost ruser
do
check_entry "$user" "$rhost" "$ruser"
done
}
# added #+@_ which should be valid characters.
$AWK 'BEGIN {count = 0} !/^[#\+@_a-zA-Z0-9\.\-\\\t ]*$/ {count += 1}
END {print count}' < "$file" |
{
read count
if [ "$count" -ne 0 ];then
message WARN rcmd015w "" "$count lines of user $user's .rhosts file were not checked because of invalid characters."
fi
}
}
check_file()
{
user=$1
file=$2
getpermit $file | {
read _f owner group ur uw ux gr gw gx or ow ox suid sgid stk
rtxt=
wtxt=
case "$gr$or" in
00) rtxt='';;
01) rtxt='world';;
10) rtxt="group \`$group'";;
11) rtxt="group \`$group' and world";;
*) rtxt='???';;
esac
case "$gw$ow" in
00) wtxt='';;
01) wtxt='world';;
10) wtxt="group \`$group'";;
11) wtxt="group \`$group' and world";;
*) wtxt='???';;
esac
[ -n "$rtxt$wtxt" ] && {
[ -n "$rtxt" ] && rtxt="$rtxt read"
[ -n "$wtxt" ] && wtxt="$wtxt write"
sep=
[ -n "$rtxt" -a -n "$wtxt" ] && sep='and'
message WARN rcmd006w "" "User $user's .rhosts file has $rtxt$sep$wtxt access."
}
}
}
process_passwd()
{
while read user homedir host
do
# Root is no longer skipped since it's rhosts file is also sensible
# [ "$homedir" = '/' -a "$user" != 'root' ] && continue
[ "$host" = "$HOSTNAME" ] && {
if [ $TESTLINK "$homedir/.rhosts" ]; then
message WARN rcmd007w "" "User $user's .rhosts file is a symbolic link:"
$LS -l "$homedir/.rhosts"
$LS $LSGROUP $LSLINK "$homedir/.rhosts"
[ -s "$homedir/.rhosts" ] && {
check_file $user "$homedir/.rhosts"
if [ -r "$homedir/.rhosts" ]; then
scan_file $user "$homedir/.rhosts"
else
message INFO read001i "" "Can not open $user's .rhosts file."
fi
}
elif [ -d "$homedir/.rhosts" ]; then
message ALERT rcmd008a "" "User $user's .rhosts file is a directory:"
$LS $LSGROUP -Rla "$homedir/.rhosts"
echo " "
elif [ -s "$homedir/.rhosts" ]; then
check_file $user "$homedir/.rhosts"
if [ -r "$homedir/.rhosts" ]; then
scan_file $user "$homedir/.rhosts"
else
message INFO read001i "" "Can not open $user's .rhosts file."
fi
fi
}
done
}
file_rhosts ()
{
while read user userid homedir
do
if [ -f "$homedir/.rhosts" ]
then
if [ "root" != "$user" ] ; then
message WARN rcmd016w "" "User $user has a .rhosts file"
else
message ALERT rcmd017a "" "Root has a .rhosts file"
fi
fileid=`$LS -anl "$homedir/.rhosts" | $AWK '{print $3}'`
# BUG: If no fileid is returned then there must be an error above
# (notice we use userids instead of names here just like in the spool checks)
[ -n "$fileid" ] && {
fowner=`$AWK -F: '$3 ~ /^'$fileid'$/ { print $1 }' $passwd_set | $HEAD -1`
[ $userid -ne $fileid ] && \
message ALERT rcmd017a "" "User $user's .rhosts file does not belong to him, belongs to the user $fowner (user id $fileid)"
}
fi
done
}
saveifs="$IFS"
# By default, a warning will be issued for any host in any .rhosts file.
rhostcase='*) note=1;;'
[ -n "$RHOST_SITES" ] && {
rhostcase=
set -f
for site in $RHOST_SITES
do
rhostcase="$rhostcase ${site}) note=0;;"
done
set +f
}
{
[ -s /etc/hosts.equiv ] && {
{
hosts=
netgroup=
line=1
while read entry
do
case $entry in
+@*) netgroup="${netgroup}`echo $entry | $SED -e 's/^+@//'` ";;
+|'+ '*) message FAIL rcmd009f "" "/etc/hosts.equiv contains '+'.";;
-*) [ $line -eq 1 -a "$HASHOSTEQUIVBUG" != 'N' ] && {
message FAIL rcmd011f "" "First line of hosts.equiv has leading '-'."
}
;;
'#'*) {
# Linux allows comments in rhosts files
[ "$OS" != "Linux" ] && {
message WARN rcmd013w "" "/etc/hosts.equiv contains an attempted comment line"
hosts="$hosts
$entry"
}
}
;;
*) hosts="$hosts
$entry";;
esac
line=`$EXPR $line + 1`
done
[ -n "$netgroup" ] && {
hosts="$hosts `$BASEDIR/util/getnetgroup $netgroup`"
}
[ -n "$hosts" ] && {
message WARN rcmd010w "" "/etc/hosts.equiv contains the following hosts:"
wildcard=0
saveifs=$IFS
IFS="
"
for host in $hosts
do
IFS=$saveifs
if [ ! -n "$host" ]; then
:
elif [ "$host" = '*' ]; then
wildcard=1
echo " (netgroup wildcard)"
else
case "$host" in
' '*) echo "$host";;
*) echo " $host";;
esac
fi
IFS="
"
done
IFS=$saveifs
[ $wildcard -eq 1 ] &&
message FAIL rcmd012f "" "Wildcard netgroup member (,,)."
}
} < /etc/hosts.equiv
}
{
if [ -n "$Tiger_PasswdFiles" ]; then
[ -f $Tiger_PasswdFiles ] && $CAT "$Tiger_PasswdFiles" > $WORKDIR/pass.list.$$
else
$GEN_PASSWD_SETS $WORKDIR/pass.list.$$
fi
}
[ -r $WORKDIR/pass.list.$$ ] && {
while read passwd_set
do
echo
echo "# Checking accounts from `$CAT $passwd_set.src`..."
$AWK -F: '{print $1, $6}' $passwd_set |
$BASEDIR/util/${GETFSHOST:=getfs-std} > $WORKDIR/home.hosts.$$
$AWK -F: '{ printf("%s %s\n", $1, $6); }' $passwd_set |
$JOIN -o 1.1 1.2 2.3 - $WORKDIR/home.hosts.$$ |
process_passwd
$AWK -F: '{print $1, $3, $6}' $passwd_set |
file_rhosts
[ ! -n "$Tiger_PasswdFiles" ] && delete $passwd_set $passwd_set.src
delete $WORKDIR/home.hosts.$$
done < $WORKDIR/pass.list.$$
}
delete $WORKDIR/pass.list.$$
} |
$OUTPUTMETHOD
#
exit 0
|