Add separated files

roles/ansible-os-hardening/tasks/limits.yml

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+---
+- name: create sane limits.conf
+  template: src='limits.conf.j2' dest='/etc/security/limits.d/10.hardcore.conf' owner=root group=root mode=0440
+  when: os_security_kernel_enable_core_dump

roles/ansible-os-hardening/tasks/login_defs.yml

@@ -0,0 +1,4 @@
+---
+- name: create login.defs
+  template: src='login.defs.j2' dest='/etc/login.defs' owner=root group=root mode=0444
+

roles/ansible-os-hardening/tasks/minimize_access.yml

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+---
+- name: minimize access
+  file: path='{{item}}' mode='go-w' recurse=yes
+  with_items:
+    - '/usr/local/sbin'
+    - '/usr/local/bin'
+    - '/usr/sbin'
+    - '/usr/bin' 
+    - '/sbin'
+    - '/bin'
+    - '{{os_env_extra_user_paths}}'
+
+- name: change shadow ownership to root and mode to 0600 | DTAG SEC Req 3.21-7
+  file: dest='/etc/shadow' owner=root group=root mode=0600
+
+- name: change su-binary to only be accessible to user and group root
+  file: dest='/bin/su' owner=root group=root mode
+  when: security_users_allow|default(None) != None

roles/ansible-os-hardening/tasks/pam.yml

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+---
+- name: update pam on Debian systems
+  command: 'pam-auth-update --package'
+  when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'
+
+- name: update pam on Redhat systems
+  command: 'authconfig --update'
+  when: ansible_os_family == 'RedHat' or ansible_os_family == 'Oracle Linux'
+
+- name: remove pam ccreds on Debian systems
+  apt: name='{{os_packages_pam_ccreds}}' state=absent
+  when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'
+
+- name: remove pam ccreds on Redhat systems
+  yum: name='{{os_packages_pam_ccreds}}' state=absent
+  when: ansible_os_family == 'RedHat' or ansible_os_family == 'Oracle Linux'
+
+- name: remove pam_cracklib, because it does not play nice with passwdqc
+  apt: name='{{os_packages_pam_cracklib}}' state=absent
+  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and os_auth_pam_passwdqc_enable
+
+- name: install the package for strong password checking
+  apt: name='{{os_packages_pam_passwdqc}}' state='installed'
+  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and os_auth_pam_passwdqc_enable
+
+- name: configure passwdqc
+  template: src='pam_passwdqd.j2' mode=0640 owner=root group=root dest='{{passwdqc_path}}'
+  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and os_auth_pam_passwdqc_enable
+
+- name: remove passwdqc
+  apt: name='{{os_packages_pam_passwdqc}}' state='absent'
+  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and not os_auth_pam_passwdqc_enable
+
+- name: install tally2
+  apt: name='libpam-modules' state=installed
+  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and not os_auth_pam_passwdqc_enable and os_auth_retries > 0
+
+- name: configure tally2
+  template: src='pam_tally2.j2' dest='{{tally2_path}}' mode=0640 owner=root group=root
+  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and not os_auth_pam_passwdqc_enable and os_auth_retries > 0
+
+- name: delete tally2 when retries is 0
+  file: path='{{tally2_path}}' state=absent
+  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and not os_auth_pam_passwdqc_enable and os_auth_retries == 0
+
+- name: update pam
+  command: 'pam-auth-update --package'
+  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu')
+
+- name: remove pam_cracklib, because it does not play nice with passwdqc
+  yum: name='{{os_packages_pam_cracklib}}' state=absent
+  when: (ansible_distribution == 'RedHat' or ansible_distribution == 'Oracle Linux') and os_auth_pam_passwdqc_enable
+
+- name: install the package for strong password checking
+  yum: name='{{os_packages_pam_passwdqc}}' state='installed'
+  when: (ansible_distribution == 'RedHat' or ansible_distribution == 'Oracle Linux') and os_auth_pam_passwdqc_enable
+
+- name: remove passwdqc
+  yum: name='{{os_packages_pam_passwdqc}}' state='absent'
+  when: (ansible_distribution == 'RedHat' or ansible_distribution == 'Oracle Linux') and not os_auth_pam_passwdqc_enable
+
+- name: configure passwdqc and tally via central system-auth confic
+  template: src='rhel_system_auth.j2' dest='/etc/pam.d/system-auth-ac' mode=0640 owner=root group=root
+
+- name: NSA 2.3.3.5 Upgrade Password Hashing Algorithm to SHA-512
+  template: src='rhel_libuser.conf.j2' dest='/etc/libuser.conf' mode=0640 owner=root group=root

roles/ansible-os-hardening/tasks/profile.yml

@@ -0,0 +1,4 @@
+---
+- name: create profile.conf
+  template: src='profile.conf.j2' dest='/etc/profile.d/pinerolo_profile.sh' owner=root group=root mode=0750
+  when: not os_security_kernel_enable_core_dump

roles/ansible-os-hardening/tasks/rhosts.yml

@@ -0,0 +1,11 @@
+---
+- name: Get user accounts | DTAG SEC Req 3.21-4
+  command: "awk -F: '{print $1}' /etc/passwd"
+  register: users
+
+- name: delete rhosts-files from system | DTAG SEC Req 3.21-4
+  file: dest='~{{ item }}/.rhosts' state=absent
+  with_items: users.stdout_lines
+
+- name: delete hosts.equiv from system | DTAG SEC Req 3.21-4
+  file: dest='/etc/hosts.equiv' state=absent

roles/ansible-os-hardening/tasks/securetty.yml

@@ -0,0 +1,3 @@
+---
+- name: create securetty
+  template: src='securetty.j2' dest='/etc/securetty' owner=root group=root mode=0400

roles/ansible-os-hardening/tasks/suid_sgid.yml

@@ -0,0 +1,19 @@
+---
+#- name: remove suid/sgid bit from binaries in blacklist
+#  file: path='{{item}}' mode='a-s'
+#  ignore_errors: true
+#  with_items:
+#    - '{{ os_security_suid_sgid_system_blacklist }}'
+#
+#- name: find binaries with suid/sgid set
+#  shell: 'find / \( -perm -4000 -o -perm -2000 \) -type f -print 2>/dev/null | grep -v "No such file or directory"'
+#  register: sbit_binaries
+#
+#- debug: var=sbit_binaries.stdout_lines
+#- debug: var={{os_security_suid_sgid_system_blacklist}}
+#
+#- name: remove suid/sgid bit from all binaries except in whitelist
+#  file: path='{{item}}' mode='a-s'
+#  with_items:
+#    - sbit_binaries.stdout_lines
+

roles/ansible-os-hardening/tasks/sysctl.yml

@@ -0,0 +1,134 @@
+---
+- name: Only enable IP traffic forwarding, if required.
+  sysctl: name='net.ipv4.ip_forward' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Only enable IP traffic forwarding, if required.
+  sysctl: name='net.ipv4.ip_forward' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+  when: os_network_forwarding
+
+- name: Only enable IP traffic forwarding, if required.
+  sysctl: name='net.ipv6.conf.all.forwarding' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Only enable IP traffic forwarding, if required.
+  sysctl: name='net.ipv6.conf.all.forwarding' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+  when: os_network_forwarding and os_network_ipv6_enable
+
+- name: Enable RFC-recommended source validation feature.
+  sysctl: name='net.ipv4.conf.all.rp_filter' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Enable RFC-recommended source validation feature.
+  sysctl: name='net.ipv4.conf.default.rp_filter' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Reduce the surface on SMURF attacks. Make sure to ignore ECHO broadcasts, which are only required in broad network analysis.
+  sysctl: name='net.ipv4.icmp_echo_ignore_broadcasts' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: There is no reason to accept bogus error responses from ICMP, so ignore them instead.
+  sysctl: name='net.ipv4.icmp_ignore_bogus_error_responses' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Limit the amount of traffic the system uses for ICMP.
+  sysctl: name='net.ipv4.icmp_ratelimit' value=100 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Adjust the ICMP ratelimit to include ping, dst unreachable, source quench, ime exceed, param problem, timestamp reply, information reply
+  sysctl: name='net.ipv4.icmp_ratemask' value=88089 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Disable or Enable IPv6 as it is needed.
+  sysctl: name='net.ipv6.conf.all.disable_ipv6' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Disable or Enable IPv6 as it is needed.
+  sysctl: name='net.ipv6.conf.all.disable_ipv6' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+  when: os_network_ipv6_enable
+
+- name: Protect against wrapping sequence numbers at gigabit speeds
+  sysctl: name='net.ipv4.tcp_timestamps' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name:  Define restriction level for announcing the local source IP
+  sysctl: name='net.ipv4.conf.all.arp_ignore' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name:  Define restriction level for announcing the local source IP
+  sysctl: name='net.ipv4.conf.all.arp_ignore' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+  when: os_network_arp_restricted
+
+- name: Define mode for sending replies in response to received ARP requests that resolve local target IP addresses 
+  sysctl: name='net.ipv4.conf.all.arp_announce' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Define mode for sending replies in response to received ARP requests that resolve local target IP addresses 
+  sysctl: name='net.ipv4.conf.all.arp_announce' value=2 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+  when: os_network_arp_restricted
+
+- name: RFC 1337 fix F1
+  sysctl: name='net.ipv4.tcp_rfc1337' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Syncookies is used to prevent SYN-flooding attacks.
+  sysctl: name='net.ipv4.tcp_syncookies' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- sysctl: name='net.ipv4.conf.all.shared_media' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv4.conf.default.shared_media' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Accepting source route can lead to malicious networking behavior, so disable it if not needed.
+  sysctl: name='net.ipv4.conf.all.accept_source_route' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: Accepting source route can lead to malicious networking behavior, so disable it if not needed.
+  sysctl: name='net.ipv4.conf.default.accept_source_route' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+# Accepting redirects can lead to malicious networking behavior, so disable
+# it if not needed.
+- sysctl: name='net.ipv4.conf.default.accept_redirects' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv4.conf.all.accept_redirects' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv4.conf.all.secure_redirects' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv4.conf.default.secure_redirects' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv6.conf.default.accept_redirects' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv6.conf.all.accept_redirects' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+# For non-routers: don't send redirects, these settings are 0
+- sysctl: name='net.ipv4.conf.all.send_redirects' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv4.conf.all.send_redirects' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: log martian packets
+  sysctl: name='net.ipv4.conf.all.log_martians' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+# ipv6 config
+# NSA 2.5.3.2.5 Limit Network-Transmitted Configuration
+- sysctl: name='net.ipv6.conf.default.router_solicitations' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv6.conf.default.accept_ra_rtr_pref' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv6.conf.default.accept_ra_pinfo' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv6.conf.default.accept_ra_defrtr' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv6.conf.default.autoconf' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv6.conf.default.dad_transmits' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+- sysctl: name='net.ipv6.conf.default.max_addresses' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+
+# This settings controls how the kernel behaves towards module changes at
+# runtime. Setting to 1 will disable module loading at runtime.
+# Setting it to 0 is actually never supported.
+- name: This settings controls how the kernel behaves towards module changes at runtime.
+  sysctl: name='kernel.modules_disabled' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+  when: not os_security_kernel_enable_module_loading
+
+# Magic Sysrq should be disabled, but can also be set to a safe value if so
+# desired for physical machines. It can allow a safe reboot if the system hangs
+# and is a 'cleaner' alternative to hitting the reset button.
+# The following values are permitted:
+#
+# * **0**   - disable sysrq
+# * **1**   - enable sysrq completely
+# * **>1**  - bitmask of enabled sysrq functions:
+# * **2**   - control of console logging level
+# * **4**   - control of keyboard (SAK, unraw)
+# * **8**   - debugging dumps of processes etc.
+# * **16**  - sync command
+# * **32**  - remount read-only
+# * **64**  - signalling of processes (term, kill, oom-kill)
+# * **128** - reboot/poweroff
+# * **256** - nicing of all RT tasks
+- sysctl: name='kernel.sysrq' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- sysctl: name='kernel.sysrq' value='{{ os_security_kernel_secure_sysrq }}' sysctl_set=yes state=present reload=yes ignoreerrors=yes
+  when: os_security_kernel_enable_sysrq
+
+- name: Prevent core dumps with SUID. These are usually only needed by developers and may contain sensitive information.
+  sysctl: name='fs.suid_dumpable' value=0 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+
+- name: # Prevent core dumps with SUID. These are usually only needed by developers and may contain sensitive information.
+  sysctl: name='fs.suid_dumpable' value=1 sysctl_set=yes state=present reload=yes ignoreerrors=yes
+  when: os_security_kernel_enable_core_dump
+

roles/ansible-os-hardening/tasks/yum.yml

@@ -0,0 +1,8 @@
+---
+- name: activate gpg-check for yum-repos in yum.conf
+  shell: "sed -i 's/gpgcheck=0/gpgcheck=1/g' /etc/yum.conf"
+  when: ansible_os_family == 'RedHat' or ansible_os_family == 'Oracle Linux'
+
+- name: activate gpg-check for yum-repos in yum-repositories
+  shell: "sed -i 's/gpgcheck=0/gpgcheck=1/g' /etc/yum.repos.d/*.repo"
+  when: ansible_os_family == 'RedHat' or ansible_os_family == 'Oracle Linux'