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openntpd-openbsd
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Replaced by src/libexec/security a few minutes ago; 

deraadt@ suggests to remove the old file right away.
OPENBSD_5_0
schwarze 13 years ago
parent
3de01ba35f
commit
1ba053e089
1 changed files with 0 additions and 664 deletions
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      src/etc/security

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src/etc/security View File

@ -1,664 +0,0 @@
#
# $OpenBSD: security,v 1.88 2009/06/03 14:45:39 jj Exp $
# from: @(#)security 8.1 (Berkeley) 6/9/93
#
PATH=/bin:/usr/bin:/sbin:/usr/sbin
umask 077
DIR=`mktemp -d /tmp/_secure.XXXXXXXXXX` || exit 1
TMP1=$DIR/_secure2
TMP2=$DIR/_secure3
LIST=$DIR/_secure5
trap 'rm -rf $DIR; exit 1' 0 1 2 3 13 15
# Check the master password file syntax.
MP=/etc/master.passwd
next_part "Checking the ${MP} file:"
awk -F: '{
if ($0 ~ /^[ ]*$/) {
printf("Line %d is a blank line.\n", NR);
next;
}
if (NF != 10)
printf("Line %d has the wrong number of fields:\n%s\n", NR, $0);
if ($1 ~ /^[+-]/)
next;
if ($1 == "")
printf("Line %d has an empty login field:\n%s\n", NR, $0);
else if ($1 !~ /^[A-Za-z0-9_][A-Za-z0-9_\-\.]*\$?$/)
printf("Login %s has non-alphanumeric characters.\n", $1);
if (length($1) > 31)
printf("Login %s has more than 31 characters.\n", $1);
if ($2 == "")
printf("Login %s has no password.\n", $1);
if ($2 != "" && length($2) != 13 && ($10 ~ /.*sh$/ || $10 == "") &&
($2 !~ /^\$[0-9a-f]+\$/) && ($2 != "skey")) {
if (system("test -s /etc/skey/"$1"") == 0)
printf("Login %s is off but still has a valid shell and an entry in /etc/skey.\n", $1);
if (system("test -d "$9" -a ! -r "$9"") == 0)
printf("Login %s is off but still has valid shell and home directory is unreadable\n\t by root; cannot check for existence of alternate access files.\n", $1);
else if (system("for file in .ssh .rhosts .shosts .klogin; do if test -e "$9"/$file; then if ((ls -ld "$9"/$file | cut -b 2-10 | grep -q r) && (test ! -O "$9"/$file)) ; then exit 1; fi; fi; done"))
printf("Login %s is off but still has a valid shell and alternate access files in\n\t home directory are still readable.\n",$1);
}
if ($3 == 0 && $1 != "root")
printf("Login %s has a user ID of 0.\n", $1);
if ($3 < 0)
printf("Login %s has a negative user ID.\n", $1);
if ($4 < 0)
printf("Login %s has a negative group ID.\n", $1);
if (int($7) != 0 && system("test "$7" -lt `date +%s`") == 0)
printf("Login %s has expired.\n", $1);
}' < $MP
next_part "${MP} has duplicate user names."
awk -F: '{ print $1 }' $MP | sort | uniq -d | column
next_part "${MP} has duplicate user IDs."
awk -F: '/^[^\+]/ { print $1 " " $3 }' $MP | sort -n +1 | tee $TMP1 |
uniq -d -f 1 | awk '{ print $2 }' > $TMP2
if [ -s $TMP2 ] ; then
while read uid; do
grep -w $uid $TMP1
done < $TMP2 | column
fi
# Backup the master password file; a special case, the normal backup
# mechanisms also print out file differences and we don't want to do
# that because this file has encrypted passwords in it.
if [ ! -d /var/backups ] ; then
mkdir /var/backups
chmod 700 /var/backups
fi
CUR=/var/backups/`basename $MP`.current
BACK=/var/backups/`basename $MP`.backup
if [ -s $CUR ] ; then
if cmp -s $CUR $MP; then
:
else
cp -p $CUR $BACK
cp -p $MP $CUR
chown root:wheel $CUR
fi
else
cp -p $MP $CUR
chown root:wheel $CUR
fi
# Check the group file syntax.
GRP=/etc/group
next_part "Checking the ${GRP} file:"
awk -F: '{
if ($0 ~ /^[ ]*$/) {
printf("Line %d is a blank line.\n", NR);
next;
}
if ($1 ~ /^[+-].*$/)
next;
if (NF != 4)
printf("Line %d has the wrong number of fields:\n%s\n", NR, $0);
if ($1 !~ /^[A-Za-z0-9_][A-Za-z0-9_\-\.]*$/)
printf("Group %s has non-alphanumeric characters.\n", $1);
if (length($1) > 31)
printf("Group %s has more than 31 characters.\n", $1);
if ($3 !~ /^[0-9]*$/)
printf("Group %s has an invalid group ID.\n", $1);
}' < $GRP
next_part "${GRP} has duplicate group names."
awk -F: '{ print $1 }' $GRP | sort | uniq -d | column
# 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.
rhome=/root
umaskset=no
list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login"
next_part "Checking root csh paths, umask values:\n${list}"
for i in $list ; do
if [ -s $i ] ; then
if egrep -aq '[[:space:]]*umask[[:space:]]' $i ; then
umaskset=yes
fi
awk '{
if ($1 == "umask") {
if ($2 % 100 / 10 ~ /^[0145]/)
print "Root umask is group writable";
if ($2 % 10 ~ /^[0145]/)
print "Root umask is other writable";
}
}' < $i
SAVE_PATH=$PATH
unset PATH
/bin/csh -f -s << end-of-csh > /dev/null 2>&1
source $i
if (\$?path) then
/bin/ls -ldgT \$path > $TMP1
else
cat /dev/null > $TMP1
endif
end-of-csh
PATH=$SAVE_PATH
awk '{
if ($10 ~ /^\.$/) {
print "The root path includes .";
next;
}
}
$1 ~ /^d....w/ \
{ print "Root path directory " $10 " is group writable." } \
$1 ~ /^d.......w/ \
{ print "Root path directory " $10 " is other writable." }' \
< $TMP1
fi
done
if [ $umaskset = "no" ] ; then
echo "\nRoot csh startup files do not set the umask."
fi
> $TMP2
rhome=/root
umaskset=no
list="/etc/profile ${rhome}/.profile"
next_part "Checking root sh paths, umask values:\n${list}"
for i in $list; do
if [ -s $i ] ; then
if egrep -a umask $i > /dev/null ; then
umaskset=yes
fi
egrep -a umask $i |
awk '$2 % 100 < 20 \
{ print "Root umask is group writable" } \
$2 % 10 < 2 \
{ print "Root umask is other writable" }'
SAVE_PATH=$PATH
SAVE_ENV=$ENV
unset PATH ENV
/bin/sh << end-of-sh > /dev/null 2>&1
. $i
if [ X"\$PATH" != "X" ]; then
list=\`echo \$PATH | /usr/bin/sed -e 's/:/ /g'\`
/bin/ls -ldgT \$list > $TMP1
else
> $TMP1
fi
echo \$ENV >> $TMP2
end-of-sh
PATH=$SAVE_PATH
ENV=$SAVE_ENV
awk '{
if ($10 ~ /^\.$/) {
print "The root path includes .";
next;
}
}
$1 ~ /^d....w/ \
{ print "Root path directory " $10 " is group writable." } \
$1 ~ /^d.......w/ \
{ print "Root path directory " $10 " is other writable." }' \
< $TMP1
fi
done
if [ $umaskset = "no" ] ; then
echo "\nRoot sh startup files do not set the umask."
fi
# A good .kshrc will not have a umask or path, that being set in .profile
# check anyway.
rhome=/root
list="/etc/ksh.kshrc `cat $TMP2`"
next_part "Checking root ksh paths, umask values:\n${list}"
(cd $rhome
for i in $list; do
if [ -s $i ] ; then
egrep -a umask $i |
awk '$2 % 100 < 20 \
{ print "Root umask is group writable" } \
$2 % 10 < 2 \
{ print "Root umask is other writable" }'
if egrep -a PATH= $i > /dev/null ; then
SAVE_PATH=$PATH
unset PATH
/bin/ksh << end-of-sh > /dev/null 2>&1
. $i
if [ X"\$PATH" != "X" ]; then
list=\`echo \$PATH | /usr/bin/sed -e 's/:/ /g'\`
/bin/ls -ldgT \$list > $TMP1
else
> $TMP1
fi
end-of-sh
PATH=$SAVE_PATH
awk '{
if ($10 ~ /^\.$/) {
print "The root path includes .";
next;
}
}
$1 ~ /^d....w/ \
{ print "Root path directory " $10 " is group writable." } \
$1 ~ /^d.......w/ \
{ print "Root path directory " $10 " is other writable." }' \
< $TMP1
fi
fi
done
)
next_part "Checking configuration files:"
# Root and uucp should both be in /etc/ftpusers.
if egrep root /etc/ftpusers > /dev/null ; then
:
else
echo "Root not listed in /etc/ftpusers file."
fi
if egrep uucp /etc/ftpusers > /dev/null ; then
:
else
echo "Uucp not listed in /etc/ftpusers file."
fi
# Uudecode should not be in the /etc/mail/aliases file.
if egrep 'uudecode|decode' /etc/mail/aliases; then
echo "There is an entry for uudecode in the /etc/mail/aliases file."
fi
# hostname.if files may contain secrets and should not be
# world-readable.
for f in /etc/hostname.* ; do
if [ ! -e $f ]; then
continue
fi
if [ "$(stat -Lf "%SLp" $f)" != "---" ]; then
echo "$f is world readable."
fi
done
# Files that should not have + signs.
list="/etc/hosts.equiv /etc/shosts.equiv /etc/hosts.lpd"
for f in $list ; do
if [ -s $f ] ; then
awk '{
if ($0 ~ /^\+@.*$/)
next;
if ($0 ~ /^\+.*$/)
printf("Plus sign in %s file.\n", FILENAME);
}' $f
fi
done
# Check for special users with .rhosts/.shosts files. Only root
# should have .rhosts/.shosts files. Also, .rhosts/.shosts
# files should not have plus signs.
next_part "Checking for special users with .rhosts/.shosts files."
awk -F: '$1 != "root" && $1 !~ /^[+-]/ && \
($3 < 100 || $1 == "ftp" || $1 == "uucp") \
{ print $1 " " $6 }' /etc/passwd |
while read uid homedir; do
for j in .rhosts .shosts; do
# Root owned .rhosts/.shosts files are ok.
if [ -s ${homedir}/$j -a ! -O ${homedir}/$j ] ; then
rhost=`ls -ldgT ${homedir}/$j`
echo "${uid}: ${rhost}"
fi
done
done
next_part "Checking .rhosts/.shosts files syntax."
awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
while read uid homedir; do
for j in .rhosts .shosts; do
if [ -s ${homedir}/$j ] ; then
awk '{
if ($0 ~ /^+@.*$/ )
next;
if ($0 ~ /^\+[ ]*$/ )
printf("%s has + sign in it.\n",
FILENAME);
}' ${homedir}/$j
fi
done
done
# Check home directories. Directories should not be owned by someone else
# or writeable.
next_part "Checking home directories."
awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
while read uid homedir; do
if [ -d ${homedir}/ ] ; then
file=`ls -ldgT ${homedir}`
echo "${uid} ${file}"
fi
done |
awk '$1 != $4 && $4 != "root" \
{ print "user " $1 " home directory is owned by " $4 }
$2 ~ /^-....w/ \
{ print "user " $1 " home directory is group writable" }
$2 ~ /^-.......w/ \
{ print "user " $1 " home directory is other writable" }'
# Files that should not be owned by someone else or readable.
list=".netrc .rhosts .gnupg/secring.gpg .gnupg/random_seed \
.pgp/secring.pgp .shosts .ssh/identity .ssh/id_dsa .ssh/id_rsa"
next_part "Checking dot files."
awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
while read uid homedir; do
for f in $list ; do
file=${homedir}/${f}
if [ -f $file ] ; then
echo "${uid} ${f} `ls -ldgT ${file}`"
fi
done
done |
awk '$1 != $5 && $5 != "root" \
{ print "user " $1 " " $2 " file is owned by " $5 }
$3 ~ /^-...r/ \
{ print "user " $1 " " $2 " file is group readable" }
$3 ~ /^-......r/ \
{ print "user " $1 " " $2 " file is other readable" }
$3 ~ /^-....w/ \
{ print "user " $1 " " $2 " file is group writable" }
$3 ~ /^-.......w/ \
{ print "user " $1 " " $2 " file is other writable" }'
# Files that should not be owned by someone else or writeable.
list=".bashrc .bash_profile .bash_login .bash_logout .cshrc \
.emacs .exrc .forward .fvwmrc .inputrc .klogin .kshrc .login \
.logout .nexrc .profile .screenrc .ssh .ssh/config \
.ssh/authorized_keys .ssh/authorized_keys2 .ssh/environment \
.ssh/known_hosts .ssh/rc .tcshrc .twmrc .xsession .xinitrc \
.Xdefaults .Xauthority"
awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
while read uid homedir; do
for f in $list ; do
file=${homedir}/${f}
if [ -f $file ] ; then
echo "${uid} ${f} `ls -ldgT ${file}`"
fi
done
done |
awk '$1 != $5 && $5 != "root" \
{ print "user " $1 " " $2 " file is owned by " $5 }
$3 ~ /^-....w/ \
{ print "user " $1 " " $2 " file is group writable" }
$3 ~ /^-.......w/ \
{ print "user " $1 " " $2 " file is other writable" }'
# Mailboxes should be owned by user and unreadable.
next_part "Checking mailbox ownership."
ls -l /var/mail | sed 1d | \
awk '$3 != $9 \
{ print "user " $9 " mailbox is owned by " $3 }
$1 != "-rw-------" \
{ print "user " $9 " mailbox is " $1 ", group " $4 }'
# File systems should not be globally exported.
next_part "Checking for globally exported file systems."
if [ -s /etc/exports ] ; then
awk '{
if (($1 ~ /^#/) || ($1 ~ /^$/))
next;
readonly = 0;
for (i = 2; i <= NF; ++i) {
if ($i ~ /^-ro$/)
readonly = 1;
else if ($i !~ /^-/ || $i ~ /^-network/)
next;
}
if (readonly)
print "File system " $1 " globally exported, read-only."
else
print "File system " $1 " globally exported, read-write."
}' < /etc/exports
fi
# Display any changes in setuid/setgid files and devices.
next_part "Setuid/device find errors:"
( set -o noglob
find / \
\( ! -fstype local -o -fstype procfs -o -fstype afs -o -fstype nnpfs \
`for f in $SUIDSKIP; do echo -o -path $f; done` \
\) -a -prune -o \
-type f -a \( -perm -u+s -o -perm -g+s \) -print0 -o \
! -type d -a ! -type f -a ! -type l -a ! -type s -a ! -type p \
-print0 | xargs -0 -r ls -ldgT | sort +9 > $LIST
)
# Display any changes in the setuid/setgid file list.
next_part "Checking setuid/setgid files and devices:"
FIELDS1=1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,0
FIELDS2=2.1,2.2,2.3,2.4,2.5,2.6,2.7,2.8,2.9,0
egrep -av '^[bc]' $LIST | join -o $FIELDS2 -110 -210 -v2 /dev/null - > $TMP1
if [ -s $TMP1 ] ; then
# Check to make sure uudecode isn't setuid.
if grep -aw uudecode $TMP1 > /dev/null ; then
echo "Uudecode is setuid."
fi
CUR=/var/backups/setuid.current
BACK=/var/backups/setuid.backup
if [ -s $CUR ] ; then
if cmp -s $CUR $TMP1 ; then
:
else
next_part "Setuid additions:"
join -o $FIELDS2 -110 -210 -v2 $CUR $TMP1 | \
tee $TMP2 | column -t
next_part "Setuid deletions:"
join -o $FIELDS1 -110 -210 -v1 $CUR $TMP1 | \
tee -a $TMP2 | column -t
next_part "Setuid changes:"
sort +9 $TMP2 $CUR $TMP1 | \
sed -e 's/[ ][ ]*/ /g' | uniq -u | column -t
cp $CUR $BACK
cp $TMP1 $CUR
fi
else
next_part "Setuid additions:"
column -t $TMP1
cp $TMP1 $CUR
fi
fi
# Check for block and character disk devices that are readable or writeable
# or not owned by root.operator.
next_part "Checking disk ownership and permissions."
>$TMP1
DISKLIST="ccd dk fd hd hk hp jb kra ra rb rd rl rx rz sd up vnd wd xd"
for i in $DISKLIST; do
egrep "^b.*/${i}[0-9][0-9]*[B-H]?[a-p]$" $LIST >> $TMP1
egrep "^c.*/r${i}[0-9][0-9]*[B-H]?[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
FIELDS1=1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,1.10,0
FIELDS2=2.1,2.2,2.3,2.4,2.5,2.6,2.7,2.8,2.9,2.10,0
# Display any changes in the device file list.
egrep -a '^[bc]' $LIST | sort +10 | \
join -o $FIELDS2 -111 -211 -v2 /dev/null - > $TMP1
if [ -s $TMP1 ] ; then
CUR=/var/backups/device.current
BACK=/var/backups/device.backup
if [ -s $CUR ] ; then
if cmp -s $CUR $TMP1 ; then
:
else
next_part "Device additions:"
join -o $FIELDS2 -111 -211 -v2 $CUR $TMP1 | \
tee $TMP2 | column -t
next_part "Device deletions:"
join -o $FIELDS1 -111 -211 -v1 $CUR $TMP1 | \
tee -a $TMP2 | column -t
# Report any block device change. Ignore character
# devices, only the name is significant.
next_part "Block device changes:"
cat $TMP2 $CUR $TMP1 | \
sed -e '/^c/d' | \
sort +10 | \
sed -e 's/[ ][ ]*/ /g' | \
uniq -u | \
column -t
cp $CUR $BACK
cp $TMP1 $CUR
fi
else
next_part "Device additions:"
column -t $TMP1
cp $TMP1 $CUR
fi
fi
# Check special files.
# Check system binaries.
#
# Create the mtree tree specifications using:
#
# mtree -cx -p DIR -K md5digest,type >/etc/mtree/DIR.secure
# chown root:wheel /etc/mtree/DIR.secure
# chmod 600 /etc/mtree/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.
next_part "Checking special files and directories.
Output format is:\n\tfilename:\n\t\tcriteria (shouldbe, reallyis)"
if [ -d /etc/mtree ] ; then
cd /etc/mtree
mtree -e -l -p / -f /etc/mtree/special
for file in *.secure; do
[ $file = '*.secure' ] && continue
tree=`sed -n -e '3s/.* //p' -e 3q $file`
next_part "Checking system binaries in ${tree}:"
mtree -f $file -p $tree
done
else
echo /etc/mtree is missing
fi
# List of files that get backed up and checked for any modifications. Each
# file is expected to have two backups, /var/backups/file.{current,backup}.
# Any changes cause the files to rotate.
_fnchg() {
echo "$1" | sed 's/^\///;s/\//_/g'
}
if [ -s /etc/changelist ] ; then
for file in `egrep -v "^(#|\+|$MP)" /etc/changelist`; do
CUR=/var/backups/$(_fnchg "$file").current
BACK=/var/backups/$(_fnchg "$file").backup
next_part "======\n${file} diffs (-OLD +NEW)\n======"
if [ -s $file -a ! -d $file ] ; then
if [ -s $CUR ] ; then
diff -ua $CUR $file
if [ -s $PARTOUT ] ; then
cp -p $CUR $BACK
cp -p $file $CUR
chown root:wheel $CUR $BACK
fi
else
diff -u /dev/null $file
cp -p $file $CUR
chown root:wheel $CUR
fi
fi
if [ ! -s $file -a -s $CUR ]; then
diff -u $CUR /dev/null
cp -p $CUR $BACK
rm -f $CUR
chown root:wheel $BACK
fi
done
for file in `sed -n 's/^+//p' /etc/changelist`; do
CUR=/var/backups/$(_fnchg "$file").current.md5
BACK=/var/backups/$(_fnchg "$file").backup.md5
if [ -s $file -a ! -d $file ] ; then
MD5_NEW=`md5 $file | sed 's/^.* //'`
if [ -s $CUR ] ; then
MD5_OLD="`cat $CUR`"
if [ "$MD5_NEW" != "$MD5_OLD" ]; then
next_part "======\n${file} MD5 checksums\n======"
echo "OLD: $MD5_OLD"
echo "NEW: $MD5_NEW"
cp -p $CUR $BACK
echo $MD5_NEW > $CUR
chown root:wheel $CUR $BACK
chmod 600 $CUR
fi
else
next_part "======\n${file} new MD5 checksum\n======"
echo "NEW: $MD5_NEW"
echo $MD5_NEW > $CUR
chown root:wheel $CUR
chmod 600 $CUR
fi
fi
if [ ! -s $file -a -s $CUR ]; then
MD5_OLD="`cat $CUR`"
next_part "======\n${file} removed MD5 checksum\n======"
echo "OLD: $MD5_OLD"
cp -p $CUR $BACK
rm $CUR
chown root:wheel $BACK
fi
done
fi
# Make backups of the labels for any mounted disks and produce diffs
# when they change.
for d in `df -ln | sed -n 's:^/dev/\([a-z]*[0-9]*\)[a-p].*$:\1:p' | sort -u`; do
file=/var/backups/disklabel.$d
CUR=$file.current
BACK=$file.backup
next_part "======\n${d} diffs (-OLD +NEW)\n======"
if disklabel $d > $file 2>&1 ; then
if [ -s $CUR ] ; then
diff -u $CUR $file
if [ -s $PARTOUT ] ; then
cp -p $CUR $BACK
cp -p $file $CUR
chown root:wheel $CUR $BACK
fi
else
cp -p $file $CUR
chown root:wheel $CUR
fi
fi
rm -f $file
done
# Backup the list of installed packages and produce diffs when it changes.
next_part "======\nPackage list changes (-OLD +NEW)\n======"
file=/var/backups/pkglist
CUR=$file.current
BACK=$file.backup
if pkg_info > $file 2>&1 ; then
if [ -s $CUR ] ; then
diff -u $CUR $file
if [ -s $PARTOUT ] ; then
cp -p $CUR $BACK
cp -p $file $CUR
chown root:wheel $CUR $BACK
fi
else
cp -p $file $CUR
chown root:wheel $CUR
fi
fi
rm -f $file

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