5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
18 # Linux password hardening
21 - name: "Set Password Strength Minimum Digit Characters."
23 path: /etc/security/pwquality.conf
24 regexp: '^[#\s]*dcredit'
27 - name: "Set Password Minimum Length."
29 path: /etc/security/pwquality.conf
30 regexp: '^[#\s]*minlen'
33 - name: "Set Password Strength Minimum Uppercase Characters."
35 path: /etc/security/pwquality.conf
36 regexp: '^[#\s]*ucredit'
39 - name: "Set Password Strength Minimum Special Characters."
41 path: /etc/security/pwquality.conf
42 regexp: '^[#\s]*ocredit'
45 - name: "Set Password Strength Minimum Lowercase Characters."
47 path: /etc/security/pwquality.conf
48 regexp: '^[#\s]*lcredit'
51 - name: "Set Password Strength Minimum Different Categories."
53 path: /etc/security/pwquality.conf
54 regexp: '^[#\s]*minclass'
57 - name: "Set Password Minimum Length in login.defs"
60 regexp: '^PASS_MIN_LEN[\s]*[0-9]*$'
61 line: 'PASS_MIN_LEN 8'
63 - name: "Set Password Minimum Age"
66 regexp: '^PASS_MIN_DAYS[\s]*[0-9]*$'
67 line: 'PASS_MIN_DAYS 0'
73 - name: "Ensure YUM Removes Previous Package Versions"
76 insertafter: '^[#\s]*\[main\]'
77 line: 'clean_requirements_on_remove = 1'
79 - name: "Ensure gpgcheck Enabled for Local Packages"
82 insertafter: '^[#\s]*\[main\]'
83 line: 'localpkg_gpgcheck = 1'
86 # Setting Ctrl-Alt-Del action
89 - name: "Disable Ctrl-Alt-Del Burst Action"
91 path: /etc/systemd/system.conf
92 insertafter: '^[#\s]*CtrlAltDelBurstAction'
93 line: 'CtrlAltDelBurstAction=none'
95 - name: "Disable Ctrl-Alt-Del Reboot Activation"
96 command: systemctl mask ctrl-alt-del.target
99 # Configure kernel modules
102 - name: "kernel module setting"
105 dest="/etc/modprobe.d/{{item}}.conf"
107 line="install {{item}} /bin/true"
121 # Disable interactive boot
124 - name: Verify that Interactive Boot is Disabled GRUB_CMDLINE_LINUX Setting
126 path: /etc/default/grub
128 regexp: '^GRUB_CMDLINE_LINUX=(.*)systemd\.confirm_spawn=(1|yes|true|on)\s*(.*)$'
129 line: 'GRUB_CMDLINE_LINUX=\1\3'
131 - name: Verify that Interactive Boot is Disabled GRUB_CMDLINE_LINUX_DEFAULT Setting
133 path: /etc/default/grub
135 regexp: '^GRUB_CMDLINE_LINUX_DEFAULT=(.*)systemd\.confirm_spawn=(1|yes|true|on)\s*(.*)$'
136 line: 'GRUB_CMDLINE_LINUX_DEFAULT=\1\3'
139 # Set file permissions
142 - name: "Set set the 600 file permissions"
148 - /boot/grub2/grub.cfg
153 # Disable direct root login
156 - name: "Direct root Logins Not Allowed"
157 shell: echo > /etc/securetty
159 - name: Change 'root' shell to nologin
164 - name: Lock 'root' password
173 - name: Disable ipv6 support if the ipv6 is not needed
174 when: ansible_default_ipv6|length == 0
176 name: net.ipv6.conf.all.disable_ipv6
181 - name: Disable Support for udp6
182 when: ansible_default_ipv6|length == 0
188 - name: Disable Support for tcp6
189 when: ansible_default_ipv6|length == 0
195 - name: Disable automatic ipv6 configuration
196 when: ansible_default_ipv6|length > 0
198 name: "{{ item.name }}"
199 value: "{{ item.value }}"
203 - { name: 'net.ipv6.conf.all.accept_source_route', value: 0 }
204 - { name: 'net.ipv6.conf.all.accept_ra', value: 0 }
205 - { name: 'net.ipv6.conf.default.accept_ra', value: 0 }
206 - { name: 'net.ipv6.conf.all.accept_redirects', value: 0 }
207 - { name: 'net.ipv6.conf.default.accept_redirects', value: 0 }
208 - { name: 'net.ipv6.conf.default.accept_source_route', value: 0 }
209 - { name: 'net.ipv6.conf.all.forwarding', value: 0 }
212 # Configure kernel parameters
215 - name: Configure the kernel parameters
217 name: "{{ item.name }}"
218 value: "{{ item.value }}"
222 - { name: 'net.ipv4.conf.default.send_redirects', value: 0 }
223 - { name: 'net.ipv4.conf.all.send_redirects', value: 0 }
224 - { name: 'net.ipv4.ip_forward', value: 0 }
225 - { name: 'net.ipv4.conf.all.accept_redirects', value: 0 }
226 - { name: 'net.ipv4.conf.all.secure_redirects', value: 0 }
227 - { name: 'net.ipv4.conf.all.log_martians', value: 1 }
228 - { name: 'net.ipv4.conf.default.log_martians', value: 1 }
229 - { name: 'net.ipv4.conf.default.accept_redirects', value: 0 }
230 - { name: 'net.ipv4.conf.default.secure_redirects', value: 0 }
231 - { name: 'net.ipv4.icmp_echo_ignore_broadcasts', value: 1 }
232 - { name: 'net.ipv4.icmp_ignore_bogus_error_responses', value: 1 }
233 - { name: 'net.ipv4.tcp_syncookies', value: 1 }
234 - { name: 'fs.suid_dumpable', value: 0 }
235 - { name: 'kernel.dmesg_restrict', value: 1 }
236 - { name: 'kernel.core_uses_pid', value: 1 }
237 - { name: 'kernel.randomize_va_space', value: 2 }
238 - { name: 'kernel.core_pattern', value: '/var/core/core'}
241 # Configure core dump
244 - name: "Disable core dump for all user"
246 path: /etc/security/limits.conf
247 insertbefore: '^[a-z].*'
248 line: '* hard core 0'
250 - name: "Configure systemd not to store core dumps"
252 path: /etc/systemd/coredump.conf
253 insertafter: '^\[Coredump\]'
259 - name: "Stop rsyslog Service"
260 shell: systemctl stop rsyslog.service
262 - name: "Disable rsyslog Service"
263 shell: systemctl disable rsyslog.service
265 - name: "Ensure the /var/log/boot.log Rotated by logrotate"
267 path: /etc/logrotate.d/syslog
268 insertbefore: 'cron$'
269 line: /var/log/boot.log
271 - name: "Set the umasks by profile file"
274 regexp: '{{ item.old }}'
275 line: '{{ item.new }}'
277 - { old: 'umask 002', new: umask 027 }
278 - { old: 'umask 022', new: umask 077 }
284 - name: Set the max_request_body_size in the keystone.conf
286 path: /etc/keystone/keystone.conf
287 insertafter: 'DEFAULT'
288 line: "# enforced by optional sizelimit middleware (keystone.middleware:RequestBodySizeLimiter)\nmax_request_body_size = 114688\n"
290 - name: Set the insecure_debug in the keystone.conf
292 path: /etc/keystone/keystone.conf
293 insertafter: 'DEFAULT'
294 line: "# If set to true, then the server will return information in HTTP responses\n# that may allow an unauthenticated or authenticated user to get more\n# information than normal, such as additional details about why authentication\n# failed. This may be useful for debugging but is insecure. (boolean value)\ninsecure_debug = false\n"
297 #Setting bootloader password
299 - name: set host os variable
300 when: host_os is defined
302 grub2_pass: "{{ host_os.grub2_password | default('Empty') }}"
304 - name: protect grub with root password
305 when: grub2_pass is defined and grub2_pass != 'Empty'
307 dest: /etc/grub.d/40_custom
312 set superusers="root"
314 password_pbkdf2 root "{{ grub2_pass }}"
316 - name: generate grub config
317 when: grub2_pass is defined and grub2_pass != 'Empty'
318 command: /usr/sbin/grub2-mkconfig -o /boot/grub2/grub.cfg
321 #Setting the noexec option to the /dev/shm mount dir
324 - name: get back device associated to mountpoint
325 shell: mount | grep ' /dev/shm ' |cut -d ' ' -f 1
326 register: device_name
329 - name: get back device previous mount option
330 shell: mount | grep ' /dev/shm ' | sed -re 's:.*\((.*)\):\1:'
331 register: device_cur_mountoption
334 - name: get back device fstype
335 shell: mount | grep ' /dev/shm ' | cut -d ' ' -f 5
336 register: device_fstype
339 - name: Ensure permission noexec are set on /dev/shm
342 src: "{{device_name.stdout}}"
343 opts: "{{device_cur_mountoption.stdout}},noexec"
345 fstype: "{{device_fstype.stdout}}"
348 # Setting file permissions
351 #- name: "Remove the other user write permission from the system directorys"
352 # command: find / -xdev \( -perm -0002 -a ! -perm -1000 \) -type d -exec chmod o-w {} \;
354 #- name: "Remove the other user write permission from the system files"
355 # command: find / -xdev -perm -0002 -type f -exec chmod o-w {} \;
357 #- name: "Modified the unauthorized SUID/SGID system executables"
358 # command: sudo chmod -s $(sudo find / -xdev \( -perm -4000 -o -perm -2000 \) -type f | grep -v sudo)