987 lines
26 KiB
Bash
987 lines
26 KiB
Bash
#!/bin/sh -
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#
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# $NetBSD: security,v 1.105 2007/11/23 15:51:27 dholland Exp $
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# from: @(#)security 8.1 (Berkeley) 6/9/93
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#
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PATH=/sbin:/usr/sbin:/bin:/usr/bin
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rcvar_manpage='security.conf(5)'
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if [ -f /etc/rc.subr ]; then
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. /etc/rc.subr
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else
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echo "Can't read /etc/rc.subr; aborting."
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exit 1;
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fi
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umask 077
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TZ=UTC; export TZ
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if [ -s /etc/security.conf ]; then
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. /etc/security.conf
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fi
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# Set reasonable defaults (if they're not set in security.conf)
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#
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backup_dir=${backup_dir:-/var/backups}
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pkgdb_dir=${pkgdb_dir:-/var/db/pkg}
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max_loginlen=${max_loginlen:-8}
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max_grouplen=${max_grouplen:-8}
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pkg_info=${pkg_info:-/usr/sbin/pkg_info}
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# Other configurable variables
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#
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special_files="/etc/mtree/special /etc/mtree/special.local"
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MP=/etc/master.passwd
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CHANGELIST=""
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work_dir=$backup_dir/work
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if [ ! -d "$work_dir" ]; then
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mkdir -p "$work_dir"
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fi
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SECUREDIR=$(mktemp -d -t _securedir) || exit 1
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trap "/bin/rm -rf $SECUREDIR ; exit 0" EXIT INT QUIT PIPE
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if ! cd "$SECUREDIR"; then
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echo "Can not cd to $SECUREDIR".
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exit 1
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fi
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ERR=err.$$
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TMP1=tmp1.$$
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TMP2=tmp2.$$
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MPBYUID=mpbyuid.$$
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MPBYPATH=mpbypath.$$
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LIST=list.$$
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OUTPUT=output.$$
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LABELS=labels.$$
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PKGS=pkgs.$$
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CHANGEFILES=changefiles.$$
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SPECIALSPEC=specialspec.$$
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# migrate_file old new
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# Determine if the "${old}" path name needs to be migrated to the
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# "${new}" path. Also checks if "${old}.current" needs migrating,
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# and if so, migrate it and possibly "${old}.current,v" and
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# "${old}.backup".
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#
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migrate_file()
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{
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_old=$1
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_new=$2
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if [ -z "$_old" -o -z "$_new" ]; then
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err 3 "USAGE: migrate_file old new"
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fi
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if [ ! -d "${_new%/*}" ]; then
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mkdir -p "${_new%/*}"
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fi
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if [ -f "${_old}" -a ! -f "${_new}" ]; then
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echo "==> migrating ${_old}"
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echo " to ${_new}"
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mv "${_old}" "${_new}"
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fi
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if [ -f "${_old}.current" -a ! -f "${_new}.current" ]; then
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echo "==> migrating ${_old}.current"
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echo " to ${_new}.current"
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mv "${_old}.current" "${_new}.current"
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if [ -f "${_old}.current,v" -a ! -f "${_new}.current,v" ]; then
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echo "==> migrating ${_old}.current,v"
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echo " to ${_new}.current,v"
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mv "${_old}.current,v" "${_new}.current,v"
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fi
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if [ -f "${_old}.backup" -a ! -f "${_new}.backup" ]; then
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echo "==> migrating ${_old}.backup"
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echo " to ${_new}.backup"
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mv "${_old}.backup" "${_new}.backup"
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fi
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fi
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}
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# backup_and_diff file printdiff
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# Determine if file needs backing up, and if so, do it.
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# If printdiff is yes, display the diffs, otherwise
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# just print a message saying "[changes omitted]".
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#
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backup_and_diff()
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{
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_file=$1
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_printdiff=$2
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if [ -z "$_file" -o -z "$_printdiff" ]; then
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err 3 "USAGE: backup_and_diff file printdiff"
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fi
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! checkyesno _printdiff
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_printdiff=$?
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_old=$backup_dir/${_file##*/}
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case "$_file" in
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$work_dir/*)
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_new=$_file
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migrate_file "$backup_dir/$_old" "$_new"
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migrate_file "$_old" "$_new"
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;;
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*)
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_new=$backup_dir/$_file
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migrate_file "$_old" "$_new"
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;;
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esac
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CUR=${_new}.current
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BACK=${_new}.backup
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if [ -f $_file ]; then
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if [ -f $CUR ] ; then
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if [ "$_printdiff" -ne 0 ]; then
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diff ${diff_options} $CUR $_file > $OUTPUT
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else
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if ! cmp -s $CUR $_file; then
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echo "[changes omitted]"
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fi > $OUTPUT
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fi
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if [ -s $OUTPUT ] ; then
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printf \
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"\n======\n%s diffs (OLD < > NEW)\n======\n" $_file
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cat $OUTPUT
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backup_file update $_file $CUR $BACK
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fi
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else
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printf "\n======\n%s added\n======\n" $_file
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if [ "$_printdiff" -ne 0 ]; then
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diff ${diff_options} /dev/null $_file
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else
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echo "[changes omitted]"
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fi
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backup_file add $_file $CUR $BACK
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fi
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else
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if [ -f $CUR ]; then
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printf "\n======\n%s removed\n======\n" $_file
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if [ "$_printdiff" -ne 0 ]; then
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diff ${diff_options} $CUR /dev/null
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else
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echo "[changes omitted]"
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fi
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backup_file remove $_file $CUR $BACK
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fi
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fi
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}
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# These are used several times.
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#
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awk -F: '!/^\+/ { print $1 " " $3 }' $MP | sort -k2n > $MPBYUID
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awk -F: '{ print $1 " " $9 }' $MP | sort -k2 > $MPBYPATH
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for file in $special_files; do
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[ -s $file ] && cat $file
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done | mtree -CM -k all > $SPECIALSPEC || exit 1
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# Check the master password file syntax.
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#
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if checkyesno check_passwd; then
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# XXX: the sense of permit_star is reversed; the code works as
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# implemented, but usage needs to be negated.
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checkyesno check_passwd_permit_star && permit_star=0 || permit_star=1
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checkyesno check_passwd_permit_nonalpha \
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&& permit_nonalpha=1 || permit_nonalpha=0
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awk -v "len=$max_loginlen" \
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-v "nowarn_shells_list=$check_passwd_nowarn_shells" \
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-v "nowarn_users_list=$check_passwd_nowarn_users" \
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-v "permit_star=$permit_star" \
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-v "permit_nonalpha=$permit_nonalpha" \
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'
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BEGIN {
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while ( getline < "/etc/shells" > 0 ) {
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if ($0 ~ /^\#/ || $0 ~ /^$/ )
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continue;
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shells[$1]++;
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}
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split(nowarn_shells_list, a);
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for (i in a) nowarn_shells[a[i]]++;
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split(nowarn_users_list, a);
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for (i in a) nowarn_users[a[i]]++;
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uid0_users_list="root toor"
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split(uid0_users_list, a);
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for (i in a) uid0_users[a[i]]++;
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FS=":";
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}
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{
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if ($0 ~ /^[ ]*$/) {
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printf "Line %d is a blank line.\n", NR;
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next;
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}
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# NIS compat entry?
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compatline = $1 ~ "^[\\+-]";
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if (compatline) {
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if ($1 == "+" && NF == 1) {
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next;
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}
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sub("^.", "", $1);
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}
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if (NF != 10)
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printf "Line %d has the wrong number of fields.\n", NR;
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if (compatline) {
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if ($3 == 0)
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printf "Line %d includes entries with uid 0.\n",
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NR;
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if ($1 == "")
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next;
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}
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if (!permit_nonalpha &&
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$1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/)
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printf "Login %s has non-alphanumeric characters.\n",
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$1;
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if (length($1) > len)
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printf "Login %s has more than "len" characters.\n",
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$1;
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if ($2 == "" && !compatline && !nowarn_users[$1])
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printf "Login %s has no password.\n", $1;
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if (!nowarn_shells[$10] && !nowarn_users[$1]) {
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if (length($2) != 13 &&
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length($2) != 20 &&
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$2 !~ /^\$1/ &&
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$2 !~ /^\$2/ &&
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$2 !~ /^\$sha1/ &&
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$2 != "" &&
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(permit_star || $2 != "*") &&
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$2 !~ /^\*[A-z-]+$/ &&
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$1 != "toor") {
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if ($10 == "" || shells[$10])
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printf "Login %s is off but still has "\
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"a valid shell (%s)\n", $1, $10;
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} else if (compatline && $10 == "") {
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# nothing
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} else if (! shells[$10])
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printf "Login %s does not have a valid "\
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"shell (%s)\n", $1, $10;
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}
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if ($3 == 0 && !uid0_users[$1] && !nowarn_users[$1])
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printf "Login %s has a user id of 0.\n", $1;
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if ($3 != "" && $3 < 0)
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printf "Login %s has a negative user id.\n", $1;
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if ($4 != "" && $4 < 0)
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printf "Login %s has a negative group id.\n", $1;
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}' < $MP > $OUTPUT
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if [ -s $OUTPUT ] ; then
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printf "\nChecking the $MP file:\n"
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cat $OUTPUT
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fi
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awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT
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if [ -s $OUTPUT ] ; then
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printf "\n$MP has duplicate user names.\n"
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column $OUTPUT
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fi
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# To not exclude 'toor', a standard duplicate root account, from the duplicate
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# account test, uncomment the line below (without egrep in it)and comment
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# out the line (with egrep in it) below it.
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#
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# < $MPBYUID uniq -d -f 1 | awk '{ print $2 }' > $TMP2
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< $MPBYUID egrep -v '^toor ' | uniq -d -f 1 | awk '{ print $2 }' > $TMP2
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if [ -s $TMP2 ] ; then
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printf "\n$MP has duplicate user id's.\n"
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while read uid; do
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grep -w $uid $MPBYUID
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done < $TMP2 | column
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fi
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fi
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# Check the group file syntax.
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#
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if checkyesno check_group; then
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GRP=/etc/group
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awk -F: -v "len=$max_grouplen" '{
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if ($0 ~ /^[ ]*$/) {
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printf "Line %d is a blank line.\n", NR;
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next;
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}
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if (NF != 4 && ($1 != "+" || NF != 1))
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printf "Line %d has the wrong number of fields.\n", NR;
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if ($1 == "+" ) {
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next;
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}
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if ($1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/)
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printf "Group %s has non-alphanumeric characters.\n",
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$1;
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if (length($1) > len)
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printf "Group %s has more than "len" characters.\n", $1;
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if ($3 !~ /[0-9]*/)
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printf "Login %s has a negative group id.\n", $1;
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}' < $GRP > $OUTPUT
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if [ -s $OUTPUT ] ; then
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printf "\nChecking the $GRP file:\n"
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cat $OUTPUT
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fi
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awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT
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if [ -s $OUTPUT ] ; then
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printf "\n$GRP has duplicate group names.\n"
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column $OUTPUT
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fi
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fi
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# Check for root paths, umask values in startup files.
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# The check for the root paths is problematical -- it's likely to fail
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# in other environments. Once the shells have been modified to warn
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# of '.' in the path, the path tests should go away.
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#
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if checkyesno check_rootdotfiles; then
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rhome=~root
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umaskset=no
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list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login"
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for i in $list ; do
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if [ -f $i ] ; then
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if egrep '^[ \t]*umask[ \t]+[0-7]+' $i > /dev/null ;
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then
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umaskset=yes
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fi
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# Double check the umask value itself; ensure that
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# both the group and other write bits are set.
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#
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egrep '^[ \t]*umask[ \t]+[0-7]+' $i |
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awk '{
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if ($2 ~ /^.$/ || $2 ~! /[^2367].$/) {
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print "\tRoot umask is group writable"
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}
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if ($2 ~ /[^2367]$/) {
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print "\tRoot umask is other writable"
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}
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}' | sort -u
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SAVE_PATH=$PATH
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unset PATH
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/bin/csh -f -s << end-of-csh > /dev/null 2>&1
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source $i
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/bin/ls -ldgT \$path > $TMP1
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end-of-csh
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export PATH=$SAVE_PATH
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awk '{
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if ($10 ~ /^\.$/) {
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print "\tThe root path includes .";
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next;
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}
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}
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$1 ~ /^d....w/ \
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{ print "\tRoot path directory " $10 " is group writable." } \
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$1 ~ /^d.......w/ \
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{ print "\tRoot path directory " $10 " is other writable." }' \
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< $TMP1
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fi
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done > $OUTPUT
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if [ $umaskset = "no" -o -s $OUTPUT ] ; then
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printf "\nChecking root csh paths, umask values:\n$list\n\n"
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if [ -s $OUTPUT ]; then
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cat $OUTPUT
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fi
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if [ $umaskset = "no" ] ; then
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printf "\tRoot csh startup files do not set the umask.\n"
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fi
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fi
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umaskset=no
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list="/etc/profile ${rhome}/.profile"
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for i in $list; do
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if [ -f $i ] ; then
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if egrep umask $i > /dev/null ; then
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umaskset=yes
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fi
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egrep umask $i |
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awk '$2 ~ /^.$/ || $2 ~ /[^2367].$/ \
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{ print "\tRoot umask is group writable" } \
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$2 ~ /[^2367]$/ \
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{ print "\tRoot umask is other writable" }'
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SAVE_PATH=$PATH
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unset PATH
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/bin/sh << end-of-sh > /dev/null 2>&1
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. $i
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list=\`echo \$PATH | /usr/bin/sed -e \
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's/^:/.:/;s/:$/:./;s/::/:.:/g;s/:/ /g'\`
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/bin/ls -ldgT \$list > $TMP1
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end-of-sh
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export PATH=$SAVE_PATH
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awk '{
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if ($10 ~ /^\.$/) {
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print "\tThe root path includes .";
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next;
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}
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}
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$1 ~ /^d....w/ \
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{ print "\tRoot path directory " $10 " is group writable." } \
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$1 ~ /^d.......w/ \
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{ print "\tRoot path directory " $10 " is other writable." }' \
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< $TMP1
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fi
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done > $OUTPUT
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if [ $umaskset = "no" -o -s $OUTPUT ] ; then
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printf "\nChecking root sh paths, umask values:\n$list\n"
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if [ -s $OUTPUT ]; then
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cat $OUTPUT
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fi
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if [ $umaskset = "no" ] ; then
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printf "\tRoot sh startup files do not set the umask.\n"
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fi
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fi
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fi
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# Root and uucp should both be in /etc/ftpusers.
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#
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if checkyesno check_ftpusers; then
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list="uucp "`awk '$2 == 0 { print $1 }' $MPBYUID`
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for i in $list; do
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if /usr/libexec/ftpd -C $i ; then
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printf "\t$i is not denied\n"
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fi
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done > $OUTPUT
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if [ -s $OUTPUT ]; then
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printf "\nChecking the /etc/ftpusers configuration:\n"
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cat $OUTPUT
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fi
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fi
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# Uudecode should not be in the /etc/mail/aliases file.
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#
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if checkyesno check_aliases; then
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for f in /etc/mail/aliases /etc/aliases; do
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if [ -f $f ] && egrep '^[^#]*(uudecode|decode).*\|' $f; then
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printf "\nEntry for uudecode in $f file.\n"
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fi
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done
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fi
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# Files that should not have + signs.
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#
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if checkyesno check_rhosts; then
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list="/etc/hosts.equiv /etc/hosts.lpd"
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for f in $list ; do
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if [ -f $f ] && egrep '\+' $f > /dev/null ; then
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printf "\nPlus sign in $f file.\n"
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fi
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done
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# Check for special users with .rhosts files. Only root and toor should
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# have .rhosts files. Also, .rhosts files should not have plus signs.
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awk -F: '$1 != "root" && $1 != "toor" && \
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($3 < 100 || $1 == "ftp" || $1 == "uucp") \
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{ print $1 " " $9 }' $MP |
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sort -k2 |
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while read uid homedir; do
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if [ -f ${homedir}/.rhosts ] ; then
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rhost=`ls -ldgT ${homedir}/.rhosts`
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printf -- "$uid: $rhost\n"
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fi
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done > $OUTPUT
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if [ -s $OUTPUT ] ; then
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printf "\nChecking for special users with .rhosts files.\n"
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cat $OUTPUT
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fi
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while read uid homedir; do
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if [ -f ${homedir}/.rhosts -a -r ${homedir}/.rhosts ] && \
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cat -f ${homedir}/.rhosts | egrep '\+' > /dev/null ; then
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printf -- "$uid: + in .rhosts file.\n"
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fi
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done < $MPBYPATH > $OUTPUT
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if [ -s $OUTPUT ] ; then
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printf "\nChecking .rhosts files syntax.\n"
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cat $OUTPUT
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fi
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fi
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|
|
# Check home directories. Directories should not be owned by someone else
|
|
# or writable.
|
|
#
|
|
if checkyesno check_homes; then
|
|
checkyesno check_homes_permit_usergroups && \
|
|
permit_usergroups=1 || permit_usergroups=0
|
|
while read uid homedir; do
|
|
if [ -d ${homedir}/ ] ; then
|
|
file=`ls -ldgT ${homedir}`
|
|
printf -- "$uid $file\n"
|
|
fi
|
|
done < $MPBYPATH |
|
|
awk -v "usergroups=$permit_usergroups" '
|
|
$1 != $4 && $4 != "root" \
|
|
{ print "user " $1 " home directory is owned by " $4 }
|
|
$2 ~ /^d....w/ && (!usergroups || $5 != $1) \
|
|
{ print "user " $1 " home directory is group writable" }
|
|
$2 ~ /^d.......w/ \
|
|
{ print "user " $1 " home directory is other writable" }' \
|
|
> $OUTPUT
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "\nChecking home directories.\n"
|
|
cat $OUTPUT
|
|
fi
|
|
|
|
# Files that should not be owned by someone else or readable.
|
|
list=".Xauthority .netrc .ssh/id_dsa .ssh/id_rsa .ssh/identity"
|
|
while read uid homedir; do
|
|
for f in $list ; do
|
|
file=${homedir}/${f}
|
|
if [ -f $file ] ; then
|
|
printf -- "$uid $f `ls -ldgT $file`\n"
|
|
fi
|
|
done
|
|
done < $MPBYPATH |
|
|
awk -v "usergroups=$permit_usergroups" '
|
|
$1 != $5 && $5 != "root" \
|
|
{ print "user " $1 " " $2 " file is owned by " $5 }
|
|
$3 ~ /^-...r/ && (!usergroups || $6 != $1) \
|
|
{ print "user " $1 " " $2 " file is group readable" }
|
|
$3 ~ /^-......r/ \
|
|
{ print "user " $1 " " $2 " file is other readable" }
|
|
$3 ~ /^-....w/ && (!usergroups || $6 != $1) \
|
|
{ print "user " $1 " " $2 " file is group writable" }
|
|
$3 ~ /^-.......w/ \
|
|
{ print "user " $1 " " $2 " file is other writable" }' \
|
|
> $OUTPUT
|
|
|
|
# Files that should not be owned by someone else or writable.
|
|
list=".bash_history .bash_login .bash_logout .bash_profile .bashrc \
|
|
.cshrc .emacs .exrc .forward .history .k5login .klogin .login \
|
|
.logout .profile .qmail .rc_history .rhosts .shosts ssh .tcshrc \
|
|
.twmrc .xinitrc .xsession .ssh/authorized_keys \
|
|
.ssh/authorized_keys2 .ssh/config .ssh/id_dsa.pub \
|
|
.ssh/id_rsa.pub .ssh/identity.pub .ssh/known_hosts \
|
|
.ssh/known_hosts2"
|
|
while read uid homedir; do
|
|
for f in $list ; do
|
|
file=${homedir}/${f}
|
|
if [ -f $file ] ; then
|
|
printf -- "$uid $f `ls -ldgT $file`\n"
|
|
fi
|
|
done
|
|
done < $MPBYPATH |
|
|
awk -v "usergroups=$permit_usergroups" '
|
|
$1 != $5 && $5 != "root" \
|
|
{ print "user " $1 " " $2 " file is owned by " $5 }
|
|
$3 ~ /^-....w/ && (!usergroups || $6 != $1) \
|
|
{ print "user " $1 " " $2 " file is group writable" }
|
|
$3 ~ /^-.......w/ \
|
|
{ print "user " $1 " " $2 " file is other writable" }' \
|
|
>> $OUTPUT
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "\nChecking dot files.\n"
|
|
cat $OUTPUT
|
|
fi
|
|
fi
|
|
|
|
# Mailboxes should be owned by user and unreadable.
|
|
#
|
|
if checkyesno check_varmail; then
|
|
ls -lA /var/mail | \
|
|
awk ' NR == 1 { next; }
|
|
$9 ~ /^\./ {next; }
|
|
$3 != $9 {
|
|
print "user " $9 " mailbox is owned by " $3
|
|
}
|
|
$1 != "-rw-------" {
|
|
print "user " $9 " mailbox is " $1 ", group " $4
|
|
}' > $OUTPUT
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "\nChecking mailbox ownership.\n"
|
|
cat $OUTPUT
|
|
fi
|
|
fi
|
|
|
|
# NFS exports shouldn't be globally exported
|
|
#
|
|
if checkyesno check_nfs && [ -f /etc/exports ]; then
|
|
awk '{
|
|
# ignore comments and blank lines
|
|
if ($0 ~ /^\#/ || $0 ~ /^$/ )
|
|
next;
|
|
# manage line continuation
|
|
while ($NF ~ /^\\$/) {
|
|
$NF = "";
|
|
line = $0 "";
|
|
getline;
|
|
$0 = line $0 "";
|
|
}
|
|
|
|
delete dir;
|
|
readonly = ndir = 0;
|
|
for (i = 1; i <= NF; ++i) {
|
|
if ($i ~ /^\//) dir[ndir++] = $i;
|
|
else if ($i ~ /^-/) {
|
|
if ($i ~ /^-(ro|o)$/) readonly = 1;
|
|
if ($i ~ /^-network/) next;
|
|
}
|
|
else next;
|
|
}
|
|
if (readonly)
|
|
for (item in dir)
|
|
rodir[nrodir++] = dir[item];
|
|
else
|
|
for (item in dir)
|
|
rwdir[nrwdir++] = dir[item];
|
|
|
|
}
|
|
|
|
END {
|
|
if (nrodir) {
|
|
printf("Globally exported file system%s, read-only:\n",
|
|
nrodir > 1 ? "s" : "");
|
|
for (item in rodir)
|
|
printf("\t%s\n", rodir[item]);
|
|
}
|
|
if (nrwdir) {
|
|
printf("Globally exported file system%s, read-write:\n",
|
|
nrwdir > 1 ? "s" : "");
|
|
for (item in rwdir)
|
|
printf("\t%s\n", rwdir[item]);
|
|
}
|
|
}' < /etc/exports > $OUTPUT
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "\nChecking for globally exported file systems.\n"
|
|
cat $OUTPUT
|
|
fi
|
|
fi
|
|
|
|
# Display any changes in setuid files and devices.
|
|
#
|
|
if checkyesno check_devices; then
|
|
> $ERR
|
|
(
|
|
|
|
# Convert check_devices_ignore_fstypes="foo !bar bax"
|
|
# into "-fstype foo -o ! -fstype bar -o -fstype bax"
|
|
# and check_devices_ignore_paths="/foo !/bar /bax"
|
|
# into " -path /foo -o ! -path /bar -o -path /bax"
|
|
#
|
|
ignexpr=$(\
|
|
echo $check_devices_ignore_fstypes | \
|
|
sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -fstype \2/g' ; \
|
|
echo $check_devices_ignore_paths | \
|
|
sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -path \2/g' \
|
|
)
|
|
|
|
# Massage the expression into ( $ignexpr ) -a -prune -o
|
|
if [ -n "${ignexpr}" ]; then
|
|
ignexpr=$(\
|
|
echo $ignexpr | \
|
|
sed -e 's/^-o /( /' \
|
|
-e 's/$/ ) -a -prune -o/' \
|
|
)
|
|
fi
|
|
|
|
find / $ignexpr \
|
|
\( \( -perm -u+s -a ! -type d \) -o \
|
|
\( -perm -g+s -a ! -type d \) -o \
|
|
-type b -o -type c \) -print0 | \
|
|
xargs -0 ls -ldgTq | sort +9 > $LIST
|
|
|
|
) 2> $OUTPUT
|
|
|
|
# Display any errors that occurred during system file walk.
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "Setuid/device find errors:\n" >> $ERR
|
|
cat $OUTPUT >> $ERR
|
|
printf "\n" >> $ERR
|
|
fi
|
|
|
|
# Display any changes in the setuid file list.
|
|
egrep -v '^[bc]' $LIST > $TMP1
|
|
if [ -s $TMP1 ] ; then
|
|
# Check to make sure uudecode isn't setuid.
|
|
if grep -w uudecode $TMP1 > /dev/null ; then
|
|
printf "\nUudecode is setuid.\n" >> $ERR
|
|
fi
|
|
|
|
file=$work_dir/setuid
|
|
migrate_file "$backup_dir/setuid" "$file"
|
|
CUR=${file}.current
|
|
BACK=${file}.backup
|
|
if [ -s $CUR ] ; then
|
|
if cmp -s $CUR $TMP1 ; then
|
|
:
|
|
else
|
|
> $TMP2
|
|
join -110 -210 -v2 $CUR $TMP1 > $OUTPUT
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "Setuid additions:\n" >> $ERR
|
|
tee -a $TMP2 < $OUTPUT >> $ERR
|
|
printf "\n" >> $ERR
|
|
fi
|
|
|
|
join -110 -210 -v1 $CUR $TMP1 > $OUTPUT
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "Setuid deletions:\n" >> $ERR
|
|
tee -a $TMP2 < $OUTPUT >> $ERR
|
|
printf "\n" >> $ERR
|
|
fi
|
|
|
|
sort -k10 $TMP2 $CUR $TMP1 | \
|
|
sed -e 's/[ ][ ]*/ /g' | \
|
|
uniq -u > $OUTPUT
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "Setuid changes:\n" >> $ERR
|
|
column -t $OUTPUT >> $ERR
|
|
printf "\n" >> $ERR
|
|
fi
|
|
|
|
backup_file update $TMP1 $CUR $BACK
|
|
fi
|
|
else
|
|
printf "Setuid additions:\n" >> $ERR
|
|
column -t $TMP1 >> $ERR
|
|
printf "\n" >> $ERR
|
|
backup_file add $TMP1 $CUR $BACK
|
|
fi
|
|
fi
|
|
|
|
# Check for block and character disk devices that are readable or
|
|
# writable or not owned by root.operator.
|
|
>$TMP1
|
|
DISKLIST="ccd ch hk hp ld md ra raid rb rd rl rx \
|
|
sd se ss uk up vnd wd xd xy"
|
|
# DISKLIST="$DISKLIST ct mt st wt"
|
|
for i in $DISKLIST; do
|
|
egrep "^b.*/${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1
|
|
egrep "^c.*/r${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1
|
|
done
|
|
|
|
awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \
|
|
{ printf "Disk %s is user %s, group %s, permissions %s.\n", \
|
|
$11, $3, $4, $1; }' < $TMP1 > $OUTPUT
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "\nChecking disk ownership and permissions.\n" >> $ERR
|
|
cat $OUTPUT >> $ERR
|
|
printf "\n" >> $ERR
|
|
fi
|
|
|
|
# Display any changes in the device file list.
|
|
egrep '^[bc]' $LIST | sort -k11 > $TMP1
|
|
if [ -s $TMP1 ] ; then
|
|
file=$work_dir/device
|
|
migrate_file "$backup_dir/device" "$file"
|
|
CUR=${file}.current
|
|
BACK=${file}.backup
|
|
|
|
if [ -s $CUR ] ; then
|
|
if cmp -s $CUR $TMP1 ; then
|
|
:
|
|
else
|
|
> $TMP2
|
|
join -111 -211 -v2 $CUR $TMP1 > $OUTPUT
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "Device additions:\n" >> $ERR
|
|
tee -a $TMP2 < $OUTPUT >> $ERR
|
|
printf "\n" >> $ERR
|
|
fi
|
|
|
|
join -111 -211 -v1 $CUR $TMP1 > $OUTPUT
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "Device deletions:\n" >> $ERR
|
|
tee -a $TMP2 < $OUTPUT >> $ERR
|
|
printf "\n" >> $ERR
|
|
fi
|
|
|
|
# Report any block device change. Ignore
|
|
# character devices, only the name is
|
|
# significant.
|
|
cat $TMP2 $CUR $TMP1 | \
|
|
sed -e '/^c/d' | \
|
|
sort -k11 | \
|
|
sed -e 's/[ ][ ]*/ /g' | \
|
|
uniq -u > $OUTPUT
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "Block device changes:\n" >> $ERR
|
|
column -t $OUTPUT >> $ERR
|
|
printf "\n" >> $ERR
|
|
fi
|
|
|
|
backup_file update $TMP1 $CUR $BACK
|
|
fi
|
|
else
|
|
printf "Device additions:\n" >> $ERR
|
|
column -t $TMP1 >> $ERR
|
|
printf "\n" >> $ERR
|
|
backup_file add $TMP1 $CUR $BACK >> $ERR
|
|
fi
|
|
fi
|
|
if [ -s $ERR ] ; then
|
|
printf "\nChecking setuid files and devices:\n"
|
|
cat $ERR
|
|
printf "\n"
|
|
fi
|
|
fi
|
|
|
|
# Check special files.
|
|
# Check system binaries.
|
|
#
|
|
# Create the mtree tree specifications using:
|
|
# mtree -cx -pDIR -kmd5,uid,gid,mode,nlink,size,link,time > DIR.secure
|
|
# chown root:wheel DIR.secure
|
|
# chmod u+r,go= DIR.secure
|
|
#
|
|
# Note, this is not complete protection against Trojan horsed binaries, as
|
|
# the hacker can modify the tree specification to match the replaced binary.
|
|
# For details on really protecting yourself against modified binaries, see
|
|
# the mtree(8) manual page.
|
|
#
|
|
if checkyesno check_mtree; then
|
|
if checkyesno check_mtree_follow_symlinks; then
|
|
check_mtree_flags="-L"
|
|
else
|
|
check_mtree_flags=""
|
|
fi
|
|
mtree -e -l -p / $check_mtree_flags -f $SPECIALSPEC 3>&1 >$OUTPUT 2>&3 |
|
|
grep -v '^mtree: dev/tty: Device not configured$' >&2
|
|
if [ -s $OUTPUT ]; then
|
|
printf "\nChecking special files and directories.\n"
|
|
cat $OUTPUT
|
|
fi
|
|
|
|
for file in /etc/mtree/*.secure; do
|
|
[ $file = '/etc/mtree/*.secure' ] && continue
|
|
tree=`sed -n -e '3s/.* //p' -e 3q $file`
|
|
mtree $check_mtree_flags -f $file -p $tree > $TMP1
|
|
if [ -s $TMP1 ]; then
|
|
printf "\nChecking $tree:\n"
|
|
cat $TMP1
|
|
fi
|
|
done > $OUTPUT
|
|
if [ -s $OUTPUT ]; then
|
|
printf "\nChecking system binaries:\n"
|
|
cat $OUTPUT
|
|
fi
|
|
fi
|
|
|
|
# Backup disklabels of available disks
|
|
#
|
|
if checkyesno check_disklabels; then
|
|
# migrate old disklabels
|
|
for file in `ls -1d $backup_dir/$backup_dir/disklabel.* \
|
|
$backup_dir/disklabel.* 2>/dev/null`; do
|
|
migrate_file "$file" "$work_dir/${file##*/}"
|
|
done
|
|
|
|
# generate list of old disklabels, fdisks & wedges and remove them
|
|
ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* 2>/dev/null |
|
|
egrep -v '\.(backup|current)(,v)?$' > $LABELS
|
|
xargs rm < $LABELS
|
|
|
|
# generate disklabels of all disks excluding: cd dk fd md st
|
|
disks=`iostat -x | awk 'NR > 1 && $1 !~ /^[cfm]d|dk|st|nfs/ { print $1; }'`
|
|
for i in $disks; do
|
|
disklabel $i > "$work_dir/disklabel.$i" 2>/dev/null
|
|
done
|
|
|
|
# if fdisk is available, generate fdisks for: ed ld sd wd
|
|
if [ -x /sbin/fdisk ]; then
|
|
disks=`iostat -x| awk 'NR > 1 && $1 ~ /^[elsw]d/ { print $1; }'`
|
|
for i in $disks; do
|
|
/sbin/fdisk $i > "$work_dir/fdisk.$i" 2>/dev/null
|
|
done
|
|
fi
|
|
|
|
# if dkctl is available, generate dkctl listwedges for: ed ld sd wd cgd ofdisk ra rl raid
|
|
if [ -x /sbin/dkctl ]; then
|
|
disks=`iostat -x| awk 'NR > 1 && $1 ~ /^[elsw]d|cgd|ofdisk|r[al]|raid/ { print $1; }'`
|
|
for i in $disks; do
|
|
/sbin/dkctl $i listwedges > "$work_dir/wedges.$i" 2>/dev/null
|
|
done
|
|
fi
|
|
|
|
# append list of new disklabels, fdisks and wedges
|
|
ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* 2>/dev/null |
|
|
egrep -v '\.(backup|current)(,v)?$' >> $LABELS
|
|
CHANGELIST="$LABELS $CHANGELIST"
|
|
fi
|
|
|
|
# Check for changes in the list of installed pkgs
|
|
#
|
|
if checkyesno check_pkgs && [ -d $pkgdb_dir ]; then
|
|
pkgs=$work_dir/pkgs
|
|
migrate_file "$backup_dir/pkgs" "$pkgs"
|
|
( cd $pkgdb_dir
|
|
$pkg_info | sort
|
|
echo ""
|
|
find . \( -name +REQUIRED_BY -o -name +CONTENTS \) -print0 |
|
|
xargs -0 ls -ldgTq | sort -t. +1 | sed -e 's, \./, ,'
|
|
) > $pkgs
|
|
echo "$pkgs" > $PKGS
|
|
CHANGELIST="$PKGS $CHANGELIST"
|
|
fi
|
|
|
|
# List of files that get backed up and checked for any modifications.
|
|
# Any changes cause the files to rotate.
|
|
#
|
|
if checkyesno check_changelist ; then
|
|
mtree -D -k type -f $SPECIALSPEC -E exclude |
|
|
sed '/^type=file/!d ; s/type=file \.//' | unvis > $CHANGEFILES
|
|
|
|
(
|
|
# Add other files which might dynamically exist:
|
|
# /etc/ifconfig.*
|
|
# /etc/raid*.conf
|
|
# /etc/rc.d/*
|
|
# /etc/rc.conf.d/*
|
|
#
|
|
echo "/etc/ifconfig.*"
|
|
echo "/etc/raid*.conf"
|
|
echo "/etc/rc.d/*"
|
|
echo "/etc/rc.conf.d/*"
|
|
|
|
# Add /etc/changelist
|
|
#
|
|
if [ -s /etc/changelist ]; then
|
|
grep -v '^#' /etc/changelist
|
|
fi
|
|
) | while read file; do
|
|
case "$file" in
|
|
*[\*\?\[]*) # If changelist line is a glob ...
|
|
# ... expand possible backup files
|
|
#
|
|
ls -1d $(echo $backup_dir/${file}.current) 2>/dev/null \
|
|
| sed "s,^$backup_dir/,, ; s,\.current$,,"
|
|
|
|
# ... expand possible files
|
|
#
|
|
ls -1d $(echo $file) 2>/dev/null
|
|
;;
|
|
*)
|
|
# Otherwise, just print the filename
|
|
echo $file
|
|
;;
|
|
esac
|
|
done >> $CHANGEFILES
|
|
CHANGELIST="$CHANGEFILES $CHANGELIST"
|
|
fi
|
|
|
|
# Special case backups, including the master password file and
|
|
# ssh private host keys. The normal backup mechanisms for
|
|
# $check_changelist (see below) also print out the actual file
|
|
# differences and we don't want to do that for these files
|
|
#
|
|
echo $MP > $TMP1 # always add /etc/master.passwd
|
|
mtree -D -k type -f $SPECIALSPEC -I nodiff |
|
|
sed '/^type=file/!d ; s/type=file \.//' | unvis >> $TMP1
|
|
grep -v '^$' $TMP1 | sort -u > $TMP2
|
|
|
|
while read file; do
|
|
backup_and_diff "$file" no
|
|
done < $TMP2
|
|
|
|
|
|
if [ -n "$CHANGELIST" ]; then
|
|
grep -h -v '^$' $CHANGELIST | sort -u > $TMP1
|
|
comm -23 $TMP1 $TMP2 | while read file; do
|
|
backup_and_diff "$file" yes
|
|
done
|
|
fi
|
|
|
|
if [ -f /etc/security.local ]; then
|
|
. /etc/security.local > $OUTPUT 2>&1
|
|
if [ -s $OUTPUT ] ; then
|
|
printf "\nRunning /etc/security.local:\n"
|
|
cat $OUTPUT
|
|
fi
|
|
fi
|