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Merged
atomic111 merged 3 commits into from
Jul 23, 2014
Merged

Lockdown mode #19

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9436c28
rename modules_disabled -> lockdown
arlimus Jul 23, 2014
69546f6
add all current requirements from default -> lockdown
arlimus Jul 23, 2014
de8b8f1
default profile checks SUID/SGID blacklist
arlimus Jul 23, 2014
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79 changes: 30 additions & 49 deletions default/serverspec/os_spec.rb
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Expand Up @@ -62,57 +62,38 @@
end

# GIS: Req 3.21-12
describe 'SUID/ SGID whitelist check' do
it 'found only whitelist suid/sgid' do
whitelist = [
# whitelist as provided by NSA
'/bin/mount', '/bin/ping', '/bin/su', '/bin/umount', '/sbin/pam_timestamp_check',
'/sbin/unix_chkpwd', '/usr/bin/at', '/usr/bin/gpasswd', '/usr/bin/locate',
'/usr/bin/newgrp', '/usr/bin/passwd', '/usr/bin/ssh-agent', '/usr/libexec/utempter/utempter', '/usr/sbin/lockdev',
'/usr/sbin/sendmail.sendmail', '/usr/bin/expiry',
# whitelist ipv6
'/bin/ping6', '/usr/bin/traceroute6.iputils',
# whitelist nfs
'/sbin/mount.nfs', '/sbin/umount.nfs',
# whitelist nfs4
'/sbin/mount.nfs4', '/sbin/umount.nfs4',
# whitelist cron
'/usr/bin/crontab',
# whitelist consolemssaging
'/usr/bin/wall', '/usr/bin/write',
# whitelist: only SGID with utmp group for multi-session access
# impact is limited; installation/usage has some remaining risk
'/usr/bin/screen',
# whitelist locate
'/usr/bin/mlocate',
# whitelist usermanagement
'/usr/bin/chage', '/usr/bin/chfn', '/usr/bin/chsh',
# whitelist fuse
'/bin/fusermount',
# whitelist pkexec
'/usr/bin/pkexec',
# whitelist sudo
'/usr/bin/sudo', '/usr/bin/sudoedit',
# whitelist postfix
'/usr/sbin/postdrop', '/usr/sbin/postqueue',
# whitelist apache
'/usr/sbin/suexec',
# whitelist squid
'/usr/lib/squid/ncsa_auth', '/usr/lib/squid/pam_auth',
# whitelist kerberos
'/usr/kerberos/bin/ksu',
# whitelist pam_caching
'/usr/sbin/ccreds_validate',
# whitelist Xorg
'/usr/bin/Xorg', # xorg
'/usr/bin/X', # xorg
'/usr/lib/dbus-1.0/dbus-daemon-launch-helper', # freedesktop ipc
'/usr/lib/vte/gnome-pty-helper', # gnome
'/usr/lib/libvte9/gnome-pty-helper', # gnome
'/usr/lib/libvte-2.90-9/gnome-pty-helper' # gnome
describe 'SUID/ SGID blacklist check' do
it 'found no blacklisted suid/sgid' do
blacklist = [
# blacklist as provided by NSA
'/usr/bin/rcp', '/usr/bin/rlogin', '/usr/bin/rsh',
# sshd must not use host-based authentication (see ssh cookbook)
'/usr/libexec/openssh/ssh-keysign',
'/usr/lib/openssh/ssh-keysign',
# misc others
'/sbin/netreport', # not normally required for user
'/usr/sbin/usernetctl', # modify interfaces via functional accounts
# connecting to ...
'/usr/sbin/userisdnctl', # no isdn...
'/usr/sbin/pppd', # no ppp / dsl ...
# lockfile
'/usr/bin/lockfile',
'/usr/bin/mail-lock',
'/usr/bin/mail-unlock',
'/usr/bin/mail-touchlock',
'/usr/bin/dotlockfile',
# need more investigation, blacklist for now
'/usr/bin/arping',
'/usr/sbin/uuidd',
'/usr/bin/mtr', # investigate current state...
'/usr/lib/evolution/camel-lock-helper-1.2', # investigate current state...
'/usr/lib/pt_chown', # pseudo-tty, needed?
'/usr/lib/eject/dmcrypt-get-device',
'/usr/lib/mc/cons.saver' # midnight commander screensaver
]

actual = command('find / -perm -4000 -o -perm -2000 -type f ! -path \'/proc/*\' -print 2>/dev/null | grep -v \'^find:\'').stdout.split(/\r?\n/)
(actual - whitelist).count.should be 0
(actual & blacklist).count.should be 0
end
end

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0 modules_disabled/serverspec/modules_spec.rb → lockdown/serverspec/modules_spec.rb
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129 changes: 129 additions & 0 deletions lockdown/serverspec/os_spec.rb
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@@ -0,0 +1,129 @@
# encoding: utf-8
#
# Copyright 2014, Deutsche Telekom AG
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require 'spec_helper'

RSpec.configure do |c|
c.filter_run_excluding skipOn: backend(Serverspec::Commands::Base).check_os[:family]
end

# GIS: Req 3.21-4
describe command('find / -name \'.rhosts\' | wc -l ') do
its(:stdout) { should match(/^0/) }
end

# GIS: Req 3.21-4
describe command('find / -name \'hosts.equiv\' | wc -l ') do
its(:stdout) { should match(/^0/) }
end

# GIS: Req 3.21-7
describe file('/etc/shadow') do
it { should be_owned_by 'root' }
end

# GIS: Req 3.21-7
describe file('/etc/shadow') do
it { should be_mode 600 }
end

# GIS: Req 3.21-8
describe command('echo $PATH | grep -ci \'\.\'') do
its(:stdout) { should match(/^0/) }
end

# GIS: Req 3.21-8
describe file('/etc/login.defs') do
its(:content) { should match(%r{^ENV_SUPATH\s+PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin}) }
end

# GIS: Req 3.21-8
describe file('/etc/login.defs') do
its(:content) { should match(%r{^ENV_PATH\s+PATH=/usr/local/bin:/usr/bin:/bin}) }
end

# GIS: Req 3.21-10
describe file('/etc/login.defs') do
its(:content) { should match(/^UMASK +027/) }
end

# GIS: Req 3.21-12
describe 'SUID/ SGID whitelist check' do
it 'found only whitelist suid/sgid' do
whitelist = [
# whitelist as provided by NSA
'/bin/mount', '/bin/ping', '/bin/su', '/bin/umount', '/sbin/pam_timestamp_check',
'/sbin/unix_chkpwd', '/usr/bin/at', '/usr/bin/gpasswd', '/usr/bin/locate',
'/usr/bin/newgrp', '/usr/bin/passwd', '/usr/bin/ssh-agent', '/usr/libexec/utempter/utempter', '/usr/sbin/lockdev',
'/usr/sbin/sendmail.sendmail', '/usr/bin/expiry',
# whitelist ipv6
'/bin/ping6', '/usr/bin/traceroute6.iputils',
# whitelist nfs
'/sbin/mount.nfs', '/sbin/umount.nfs',
# whitelist nfs4
'/sbin/mount.nfs4', '/sbin/umount.nfs4',
# whitelist cron
'/usr/bin/crontab',
# whitelist consolemssaging
'/usr/bin/wall', '/usr/bin/write',
# whitelist: only SGID with utmp group for multi-session access
# impact is limited; installation/usage has some remaining risk
'/usr/bin/screen',
# whitelist locate
'/usr/bin/mlocate',
# whitelist usermanagement
'/usr/bin/chage', '/usr/bin/chfn', '/usr/bin/chsh',
# whitelist fuse
'/bin/fusermount',
# whitelist pkexec
'/usr/bin/pkexec',
# whitelist sudo
'/usr/bin/sudo', '/usr/bin/sudoedit',
# whitelist postfix
'/usr/sbin/postdrop', '/usr/sbin/postqueue',
# whitelist apache
'/usr/sbin/suexec',
# whitelist squid
'/usr/lib/squid/ncsa_auth', '/usr/lib/squid/pam_auth',
# whitelist kerberos
'/usr/kerberos/bin/ksu',
# whitelist pam_caching
'/usr/sbin/ccreds_validate',
# whitelist Xorg
'/usr/bin/Xorg', # xorg
'/usr/bin/X', # xorg
'/usr/lib/dbus-1.0/dbus-daemon-launch-helper', # freedesktop ipc
'/usr/lib/vte/gnome-pty-helper', # gnome
'/usr/lib/libvte9/gnome-pty-helper', # gnome
'/usr/lib/libvte-2.90-9/gnome-pty-helper' # gnome
]
actual = command('find / -perm -4000 -o -perm -2000 -type f ! -path \'/proc/*\' -print 2>/dev/null | grep -v \'^find:\'').stdout.split(/\r?\n/)
(actual - whitelist).count.should be 0
end
end

# GIS: Req 3.21-16
describe 'Unique uid' do
it 'check for unique uids' do
actual = command('cat /etc/passwd | cut -d \':\' -f 3').stdout.split(/\r?\n/)
hm = actual.each_with_object(Hash.new(0)) { |d, counts| counts[d] += 1 }
hm.each do |k, v|
str = "User: UID #{k} instances: "
("#{str}#{v}").should eq("#{str}1")
end
end
end
73 changes: 73 additions & 0 deletions lockdown/serverspec/spec_helper.rb
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# encoding: utf-8
#
# Copyright 2014, Deutsche Telekom AG
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

if ENV['STANDALONE_SPEC']

require 'serverspec'
require 'pathname'
require 'net/ssh'
require 'highline/import'

include Serverspec::Helper::Ssh
include Serverspec::Helper::DetectOS

RSpec.configure do |c|

if ENV['ASK_SUDO_PASSWORD']
c.sudo_password = ask('Enter sudo password: ') { |q| q.echo = false }
else
c.sudo_password = ENV['SUDO_PASSWORD']
end

options = {}

if ENV['ASK_LOGIN_PASSWORD']
options[:password] = ask("\nEnter login password: ") { |q| q.echo = false }
else
options[:password] = ENV['LOGIN_PASSWORD']
end

if ENV['ASK_LOGIN_USERNAME']
user = ask("\nEnter login username: ") { |q| q.echo = false }
else
user = ENV['LOGIN_USERNAME'] || ENV['user'] || Etc.getlogin
end

if user.nil?
puts 'specify login user env LOGIN_USERNAME= or user='
exit 1
end

c.host = ENV['TARGET_HOST']
options.merge(Net::SSH::Config.for(c.host))
c.ssh = Net::SSH.start(c.host, user, options)
c.os = backend.check_os

end

else
require 'serverspec'

include Serverspec::Helper::Exec
include Serverspec::Helper::DetectOS

RSpec.configure do |c|
c.before :all do
c.path = '/sbin:/usr/sbin'
end
end
end
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