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#!/bin/sh -
#
# $NetBSD: security,v 1.131 2023/07/05 12:07:21 martin Exp $
# from: @(#)security 8.1 (Berkeley) 6/9/93
#
PATH=/sbin:/usr/sbin:/bin:/usr/bin
rcvar_manpage='security.conf(5)'
if [ -f /etc/rc.subr ]; then
. /etc/rc.subr
else
echo "Can't read /etc/rc.subr; aborting."
exit 1;
fi
umask 077
TZ=UTC; export TZ
if [ -s /etc/security.conf ]; then
. /etc/security.conf
fi
if [ -s /etc/pkgpath.conf ]; then
. /etc/pkgpath.conf
fi
# Set reasonable defaults (if they're not set in security.conf)
#
backup_dir=${backup_dir:-/var/backups}
max_loginlen=${max_loginlen:-8}
max_grouplen=${max_grouplen:-8}
pkg_admin=${pkg_admin:-/usr/sbin/pkg_admin}
pkg_info=${pkg_info:-/usr/sbin/pkg_info}
# Other configurable variables
#
special_files="/etc/mtree/special /etc/mtree/special.local"
MP=/etc/master.passwd
CHANGELIST=""
work_dir=$backup_dir/work
if [ ! -d "$work_dir" ]; then
mkdir -p "$work_dir"
fi
SECUREDIR=$(mktemp -d -t _securedir) || exit 1
trap "/bin/rm -rf $SECUREDIR ; exit 0" EXIT INT QUIT PIPE
if ! cd "$SECUREDIR"; then
echo "Can not cd to $SECUREDIR".
exit 1
fi
ERR=err.$$
TMP1=tmp1.$$
TMP2=tmp2.$$
MPBYUID=mpbyuid.$$
MPBYPATH=mpbypath.$$
LIST=list.$$
OUTPUT=output.$$
LABELS=labels.$$
LVM_LABELS=lvm.$$
PKGS=pkgs.$$
CHANGEFILES=changefiles.$$
SPECIALSPEC=specialspec.$$
if [ -n "${pkgdb_dir}" ]; then
echo "WARNING: Setting pkgdb_dir in security.conf(5) is deprecated"
echo "WARNING: Please define PKG_DBDIR in pkg_install.conf(5) instead"
_compat_K_flag="-K ${pkgdb_dir}"
fi
have_pkgs() {
$pkg_info ${_compat_K_flag} -q -E '*'
}
# migrate_file old new
# Determine if the "${old}" path name needs to be migrated to the
# "${new}" path. Also checks if "${old}.current" needs migrating,
# and if so, migrate it and possibly "${old}.current,v" and
# "${old}.backup".
#
migrate_file()
{
_old=$1
_new=$2
if [ -z "$_old" ] || [ -z "$_new" ]; then
err 3 "USAGE: migrate_file old new"
fi
if [ ! -d "${_new%/*}" ]; then
mkdir -p "${_new%/*}"
fi
if [ -f "${_old}" ] && ! [ -f "${_new}" ]; then
echo "==> migrating ${_old}"
echo " to ${_new}"
mv "${_old}" "${_new}"
fi
if [ -f "${_old}.current" ] && ! [ -f "${_new}.current" ]; then
echo "==> migrating ${_old}.current"
echo " to ${_new}.current"
mv "${_old}.current" "${_new}.current"
if [ -f "${_old}.current,v" ] &&
! [ -f "${_new}.current,v" ]; then
echo "==> migrating ${_old}.current,v"
echo " to ${_new}.current,v"
mv "${_old}.current,v" "${_new}.current,v"
fi
if [ -f "${_old}.backup" ] && ! [ -f "${_new}.backup" ]; then
echo "==> migrating ${_old}.backup"
echo " to ${_new}.backup"
mv "${_old}.backup" "${_new}.backup"
fi
fi
}
# backup_and_diff file printdiff
# Determine if file needs backing up, and if so, do it.
# If printdiff is yes, display the diffs, otherwise
# just print a message saying "[changes omitted]".
#
backup_and_diff()
{
_file=$1
_printdiff=$2
if [ -z "$_file" ] || [ -z "$_printdiff" ]; then
err 3 "USAGE: backup_and_diff file printdiff"
fi
! checkyesno _printdiff
_printdiff=$?
_old=$backup_dir/${_file##*/}
case "$_file" in
$work_dir/*)
_new=$_file
migrate_file "$backup_dir/$_old" "$_new"
migrate_file "$_old" "$_new"
;;
*)
_new=$backup_dir/$_file
migrate_file "$_old" "$_new"
;;
esac
CUR=${_new}.current
BACK=${_new}.backup
if [ -f $_file ]; then
if [ -f $CUR ] ; then
if [ "$_printdiff" -ne 0 ]; then
diff ${diff_options} $CUR $_file > $OUTPUT
else
if ! cmp -s $CUR $_file; then
echo "[changes omitted]"
fi > $OUTPUT
fi
if [ -s $OUTPUT ] ; then
printf \
"\n======\n%s diffs (OLD < > NEW)\n======\n" $_file
cat $OUTPUT
backup_file update $_file $CUR $BACK
fi
else
printf "\n======\n%s added\n======\n" $_file
if [ "$_printdiff" -ne 0 ]; then
diff ${diff_options} /dev/null $_file
else
echo "[changes omitted]"
fi
backup_file add $_file $CUR $BACK
fi
else
if [ -f $CUR ]; then
printf "\n======\n%s removed\n======\n" $_file
if [ "$_printdiff" -ne 0 ]; then
diff ${diff_options} $CUR /dev/null
else
echo "[changes omitted]"
fi
backup_file remove $_file $CUR $BACK
fi
fi
}
# These are used several times.
#
awk -F: '!/^\+/ { print $1 " " $3 }' $MP | sort -k2n > $MPBYUID
awk -F: '{ print $1 " " $9 }' $MP | sort -k2 > $MPBYPATH
for file in $special_files; do
[ -s $file ] && cat $file
done | mtree -CM -k all > $SPECIALSPEC || exit 1
# Check for enough entropy.
#
if checkyesno check_entropy; then
if [ "$(sysctl -n kern.entropy.needed)" != 0 ]; then
printf '\n'
printf 'Entropy:\n'
printf 'System may need more entropy for cryptography.\n'
printf 'See the entropy(7) man page for details.\n'
fi
fi
# Check the master password file syntax.
#
if checkyesno check_passwd; then
# XXX: the sense of permit_star is reversed; the code works as
# implemented, but usage needs to be negated.
checkyesno check_passwd_permit_star && permit_star=0 || permit_star=1
checkyesno check_passwd_permit_nonalpha \
&& permit_nonalpha=1 || permit_nonalpha=0
awk -v "len=$max_loginlen" \
-v "nowarn_shells_list=$check_passwd_nowarn_shells" \
-v "nowarn_users_list=$check_passwd_nowarn_users" \
-v "permit_star=$permit_star" \
-v "permit_nonalpha=$permit_nonalpha" \
'
BEGIN {
while ( getline < "/etc/shells" > 0 ) {
if ($0 ~ /^\#/ || $0 ~ /^$/ )
continue;
shells[$1]++;
}
split(nowarn_shells_list, a);
for (i in a) nowarn_shells[a[i]]++;
split(nowarn_users_list, a);
for (i in a) nowarn_users[a[i]]++;
uid0_users_list="root toor"
split(uid0_users_list, a);
for (i in a) uid0_users[a[i]]++;
FS=":";
}
{
if ($0 ~ /^[ ]*$/) {
printf "Line %d is a blank line.\n", NR;
next;
}
# NIS compat entry?
compatline = $1 ~ "^[\\+-]";
if (compatline) {
if ($1 == "+" && NF == 1) {
next;
}
sub("^.", "", $1);
}
if (NF != 10)
printf "Line %d has the wrong number of fields.\n", NR;
if (compatline) {
if ($3 == 0)
printf "Line %d includes entries with uid 0.\n",
NR;
if ($1 == "")
next;
}
if (!permit_nonalpha &&
$1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/)
printf "Login %s has non-alphanumeric characters.\n",
$1;
if (length($1) > len)
printf "Login %s has more than "len" characters.\n",
$1;
if ($2 == "" && !compatline && !nowarn_users[$1])
printf "Login %s has no password.\n", $1;
if (!nowarn_shells[$10] && !nowarn_users[$1]) {
if (length($2) != 13 &&
length($2) != 20 &&
$2 !~ /^\$1/ &&
$2 !~ /^\$2/ &&
$2 !~ /^\$sha1/ &&
$2 !~ /^\$argon2(i|d|id)/ &&
$2 != "" &&
(permit_star || $2 != "*") &&
$2 !~ /^\*[A-z-]+$/ &&
$1 != "toor") {
if ($10 == "" || shells[$10])
printf "Login %s is off but still has "\
"a valid shell (%s)\n", $1, $10;
} else if (compatline && $10 == "") {
# nothing
} else if (! shells[$10])
printf "Login %s does not have a valid "\
"shell (%s)\n", $1, $10;
}
if ($3 == 0 && !uid0_users[$1] && !nowarn_users[$1])
printf "Login %s has a user id of 0.\n", $1;
if ($3 != "" && $3 < 0)
printf "Login %s has a negative user id.\n", $1;
if ($4 != "" && $4 < 0)
printf "Login %s has a negative group id.\n", $1;
}' < $MP > $OUTPUT
if [ -s $OUTPUT ] ; then
printf "\nChecking the $MP file:\n"
cat $OUTPUT
fi
awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT
if [ -s $OUTPUT ] ; then
printf "\n$MP has duplicate user names.\n"
column $OUTPUT
fi
awk -v "permit_dups_list=$check_passwd_permit_dups" \
'
BEGIN {
split(permit_dups_list, a);
for (i in a) permit_dups[a[i]]++;
}
{
if (!permit_dups[$1])
print $2;
}' < $MPBYUID | uniq -d > $TMP2
if [ -s $TMP2 ] ; then
printf "\n$MP has duplicate user ids.\n"
while read uid; do
grep -w $uid $MPBYUID
done < $TMP2 | column
fi
fi
# Check the group file syntax.
#
if checkyesno check_group; then
GRP=/etc/group
awk -F: -v "len=$max_grouplen" '{
if ($0 ~ /^[ ]*$/) {
printf "Line %d is a blank line.\n", NR;
next;
}
if (NF != 4 && ($1 != "+" || NF != 1))
printf "Line %d has the wrong number of fields.\n", NR;
if ($1 == "+" ) {
next;
}
if ($1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/)
printf "Group %s has non-alphanumeric characters.\n",
$1;
if (length($1) > len)
printf "Group %s has more than "len" characters.\n", $1;
if ($3 !~ /[0-9]*/)
printf "Login %s has a negative group id.\n", $1;
}' < $GRP > $OUTPUT
if [ -s $OUTPUT ] ; then
printf "\nChecking the $GRP file:\n"
cat $OUTPUT
fi
awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT
dupgroups=""
for group in $(cat $OUTPUT) ; do
gcount=$(awk -F: "/$group/ { print \$1,\$3 }" $GRP |
sort -u | wc -l)
if [ $gcount -gt 1 ]; then
dupgroups="$dupgroups $group"
fi
done
if [ ! -z $dupgroups ] ; then
printf "\n$GRP has duplicate group names.\n"
printf "$dupgroups\n"
fi
fi
# Check for root paths, umask values in startup files.
# The check for the root paths is problematical -- it's likely to fail
# in other environments. Once the shells have been modified to warn
# of '.' in the path, the path tests should go away.
#
if checkyesno check_rootdotfiles; then
rhome=~root
umaskset=no
list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login"
for i in $list ; do
if [ -f $i ] ; then
if egrep '^[ \t]*umask[ \t]+[0-7]+' $i > /dev/null ;
then
umaskset=yes
fi
# Double check the umask value itself; ensure that
# both the group and other write bits are set.
#
egrep '^[ \t]*umask[ \t]+[0-7]+' $i |
awk '{
if ($2 ~ /^.$/ || $2 ~! /[^2367].$/) {
print "\tRoot umask is group writable"
}
if ($2 ~ /[^2367]$/) {
print "\tRoot umask is other writable"
}
}' | sort -u
SAVE_PATH=$PATH
unset PATH
/bin/csh -f -s << end-of-csh > /dev/null 2>&1
source $i
/bin/ls -ldgT \$path > $TMP1
end-of-csh
export PATH=$SAVE_PATH
awk '{
if ($10 ~ /^\.$/) {
print "\tThe root path includes .";
next;
}
}
$1 ~ /^d....w/ \
{ print "\tRoot path directory " $10 " is group writable." } \
$1 ~ /^d.......w/ \
{ print "\tRoot path directory " $10 " is other writable." }' \
< $TMP1
fi
done > $OUTPUT
if [ $umaskset = no ] || [ -s $OUTPUT ] ; then
printf "\nChecking root csh paths, umask values:\n$list\n\n"
if [ -s $OUTPUT ]; then
cat $OUTPUT
fi
if [ $umaskset = no ] ; then
printf "\tRoot csh startup files do not set the umask.\n"
fi
fi
umaskset=no
list="/etc/profile ${rhome}/.profile"
for i in $list; do
if [ -f $i ] ; then
if egrep umask $i > /dev/null ; then
umaskset=yes
fi
egrep umask $i |
awk '$2 ~ /^.$/ || $2 ~ /[^2367].$/ \
{ print "\tRoot umask is group writable" } \
$2 ~ /[^2367]$/ \
{ print "\tRoot umask is other writable" }'
SAVE_PATH=$PATH
unset PATH
/bin/sh << end-of-sh > /dev/null 2>&1
. $i
list=\$(echo \$PATH | /usr/bin/sed -e \
's/^:/.:/;s/:$/:./;s/::/:.:/g;s/:/ /g')
/bin/ls -ldgT \$list > $TMP1
end-of-sh
export PATH=$SAVE_PATH
awk '{
if ($10 ~ /^\.$/) {
print "\tThe root path includes .";
next;
}
}
$1 ~ /^d....w/ \
{ print "\tRoot path directory " $10 " is group writable." } \
$1 ~ /^d.......w/ \
{ print "\tRoot path directory " $10 " is other writable." }' \
< $TMP1
fi
done > $OUTPUT
if [ $umaskset = no ] || [ -s $OUTPUT ] ; then
printf "\nChecking root sh paths, umask values:\n$list\n"
if [ -s $OUTPUT ]; then
cat $OUTPUT
fi
if [ $umaskset = no ] ; then
printf "\tRoot sh startup files do not set the umask.\n"
fi
fi
fi
# Root and uucp should both be in /etc/ftpusers.
#
if checkyesno check_ftpusers; then
list="uucp "$(awk '$2 == 0 { print $1 }' $MPBYUID)
for i in $list; do
if /usr/libexec/ftpd -C $i ; then
printf "\t$i is not denied\n"
fi
done > $OUTPUT
if [ -s $OUTPUT ]; then
printf "\nChecking the /etc/ftpusers configuration:\n"
cat $OUTPUT
fi
fi
# Uudecode should not be in the /etc/mail/aliases file.
#
if checkyesno check_aliases; then
for f in /etc/mail/aliases /etc/aliases; do
if [ -f $f ] && egrep '^[^#]*(uudecode|decode).*\|' $f; then
printf "\nEntry for uudecode in $f file.\n"
fi
done
fi
# Files that should not have + signs.
#
if checkyesno check_rhosts; then
list="/etc/hosts.equiv /etc/hosts.lpd"
for f in $list ; do
if [ -f $f ] && egrep '\+' $f > /dev/null ; then
printf "\nPlus sign in $f file.\n"
fi
done
# Check for special users with .rhosts files. Only root and toor should
# have .rhosts files. Also, .rhosts files should not have plus signs.
awk -F: '$1 != "root" && $1 != "toor" && \
($3 < 100 || $1 == "ftp" || $1 == "uucp") \
{ print $1 " " $9 }' $MP |
sort -k2 |
while read uid homedir; do
if [ -f ${homedir}/.rhosts ] ; then
rhost=$(ls -ldgT ${homedir}/.rhosts)
printf -- "$uid: $rhost\n"
fi
done > $OUTPUT
if [ -s $OUTPUT ] ; then
printf "\nChecking for special users with .rhosts files.\n"
cat $OUTPUT
fi
while read uid homedir; do
if [ -f ${homedir}/.rhosts ] &&
[ -r ${homedir}/.rhosts ] &&
cat -f ${homedir}/.rhosts | egrep '\+' > /dev/null
then
printf -- "$uid: + in .rhosts file.\n"
fi
done < $MPBYPATH > $OUTPUT
if [ -s $OUTPUT ] ; then
printf "\nChecking .rhosts files syntax.\n"
cat $OUTPUT
fi
fi
# 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" \
-v "permit_owners_list=$check_homes_permit_other_owner" '
BEGIN {
split(permit_owners_list, a);
for (i in a) permit_owners[a[i]]++;
}
$1 != $4 && $4 != "root" && !permit_owners[$1] \
{ 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" \
-v "permit_owners_list=$check_homes_permit_other_owner" '
BEGIN {
split(permit_owners_list, a);
for (i in a) permit_owners[a[i]]++;
}
$1 != $5 && $5 != "root" && !permit_owners[$1] \
{ 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" \
-v "permit_owners_list=$check_homes_permit_other_owner" '
BEGIN {
split(permit_owners_list, a);
for (i in a) permit_owners[a[i]]++;
}
$1 != $5 && $5 != "root" && !permit_owners[$1] \
{ 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 < $LABELS
disks="$(/sbin/sysctl -n hw.iostatnames)"
# generate disklabels of all disks excluding: cd fd md dk st
# nfs and "device" (the header of iostat)
for i in $disks; do
case $i in
[cfm]d[0-9]*|dk[0-9]*|st[0-9]*|nfs[0-9]*)
;;
*)
if disklabel $i > /dev/null 2>&1; then
disklabel $i > "$work_dir/disklabel.$i"
fi
;;
esac
done
# if fdisk is available, generate fdisks for: ed ld sd wd
if [ -x /sbin/fdisk ]; then
for i in $disks; do
case $i in
[elsw]d[0-9]*)
/sbin/fdisk $i > "$work_dir/fdisk.$i" \
2>/dev/null
;;
esac
done
fi
# if dkctl is available, generate dkctl listwedges
# for: ed ld sd wd cgd ofdisk ra rl raid
if [ -x /sbin/dkctl ]; then
for i in $disks; do
case $i in
[elsw]d[0-9]*|cgd[0-9]*|ofdisk[0-9]*|r[al][0-9]*|raid[0-9]*)
if /sbin/dkctl $i listwedges |
grep -qe '[0-9] wedges:'; then
/sbin/dkctl $i listwedges \
> "$work_dir/wedges.$i" 2>/dev/null
fi
;;
esac
done
fi
# if raidctl is available, generate raidctls for: raid
if [ -x /sbin/raidctl ]; then
disks=$(iostat -x | awk 'NR > 1 && $1 ~ /^raid/ { print $1; }')
for i in $disks; do
/sbin/raidctl -G $i > "$work_dir/raidconf.$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.* \
$work_dir/raidconf.* 2>/dev/null |
egrep -v '\.(backup|current)(,v)?$' >> $LABELS
CHANGELIST="$LABELS $CHANGELIST"
fi
if checkyesno check_lvm; then
# generate list of existing LVM elements Physical Volumes,
# Volume Groups and Logical Volumes.
if [ -x /sbin/lvm ]; then
lvm pvdisplay -m >"$work_dir/lvm.pv" 2>/dev/null
lvm vgdisplay -m >"$work_dir/lvm.vg" 2>/dev/null
lvm lvdisplay -m >"$work_dir/lvm.lv" 2>/dev/null
fi
ls -1d $work_dir/lvm.* 2>/dev/null |
egrep -v '\.(backup|current)(,v)?$'>> $LVM_LABELS
CHANGELIST="$CHANGELIST $LVM_LABELS"
fi
# Check for changes in the list of installed pkgs
#
if checkyesno check_pkgs && have_pkgs; then
pkgs=$work_dir/pkgs
migrate_file "$backup_dir/pkgs" "$pkgs"
pkg_dbdir=$(${pkg_admin} config-var PKG_DBDIR)
: ${pkg_dbdir:=/usr/pkg/pkgdb}
( cd $pkg_dbdir
$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 > $CHANGEFILES
(
# Add other files which might dynamically exist:
# /etc/ifconfig.*
# /etc/raid*.conf
# /etc/rc.d/*
# /etc/rc.conf.d/*
#
echo "/etc/ifconfig.*"
echo "/etc/raid*.conf"
echo "/etc/rc.d/*"
echo "/etc/rc.conf.d/*"
echo "/etc/lvm/backup/*"
echo "/etc/lvm/archive/*"
# Add /etc/changelist
#
if [ -s /etc/changelist ]; then
grep -v '^#' /etc/changelist
fi
) | while read file; do
case "$file" in
*[\*\?\[]*) # If changelist line is a glob ...
# ... expand possible backup files
#
ls -1d $backup_dir/${file}.current 2>/dev/null \
| sed "s,^$backup_dir/,, ; s,\.current$,,"
# ... expand possible files
#
ls -1d $file 2>/dev/null
;;
*)
# Otherwise, just print the filename
echo $file
;;
esac
done >> $CHANGEFILES
CHANGELIST="$CHANGEFILES $CHANGELIST"
fi
# Save entropy to ${random_file} if defined, like
# /etc/rc.d/random_seed.
#
if [ -n "${random_file:-}" ]; then
rndctl -S "$random_file"
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 have_pkgs; then
if checkyesno check_pkg_vulnerabilities; then
${pkg_admin} ${_compat_K_flag} audit >${OUTPUT} 2>&1
if [ -s ${OUTPUT} ]; then
printf "\nInstalled vulnerable packages:\n"
cat ${OUTPUT}
fi
fi
if checkyesno check_pkg_signatures; then
${pkg_admin} ${_compat_K_flag} check >${OUTPUT} 2>&1
if [ $? -ne 0 ]; then
printf "\nFiles with invalid signatures:\n"
cat ${OUTPUT}
fi
fi
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
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