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ansible-cis-ubuntu-2204's Introduction

CIS - Ubuntu 22.04

Ansible Lint Ansible Molecule Test

Configure Ubuntu 22.04 to be CIS compliant.

Tested with:

  • Ubuntu 22.04
  • Ubuntu 23.04

This role will make changes to the system that could break things.
This is not an auditing tool but rather a remediation tool to be used after an audit has been conducted.

This role was developed against a clean install of the Operating System.
If you are implementing to an existing system please review this role for any site specific changes that are needed.

Based on CIS Ubuntu Linux 22.04 LTS Benchmark v1.0.0.

TODO

  • improve grub changes
  • improve auditd for 32 or 64 system check to add rules
  • check ufw sysctl usage
  • improve cis_ubuntu2204_set_journal_upload
  • improve with some variables for section5
  • extend cis_ubuntu2204_rule_5_3_4
    • to also check in subfiles under '/etc/sudoers.d/'
  • rules under '5.4', should be more tested
    • example for 'cis_ubuntu2204_rule_5_4_2' which fail to use password after performed
    • seams error found, but need tests, CIS pdf define success=1 but default value in ubuntu is success=2

Requirements

You should carefully read through the tasks to make sure these changes will not break your systems before running this playbook.

To start working in this Role you just need to install Python and Ansible:

$sudo apt install python3 python3-pip sshpass
# if python >= 3.11 used add also '--break-system-packages'
$python3 -m pip install ansible ansible-lint yamllint

For run tests with molecule, you need also to install:

# if python >= 3.11 used add also '--break-system-packages'
$python3 -m pip install molecule molecule-plugins[docker]

Role Variables

run only setup per section

default all section are active and will performed

cis_ubuntu2204_section1: true
cis_ubuntu2204_section2: true
cis_ubuntu2204_section3: true
cis_ubuntu2204_section4: true
cis_ubuntu2204_section5: true
cis_ubuntu2204_section6: true

variables not included in CIS

# additional configs for ssh which not defined to set by CIS
cis_ubuntu2204_rule_5_2_23: true

variables which are recommended by CIS, but disable in this role

change 'false' below to 'true', to be CIS recommended if needed

# Ensure bootloader password is set
cis_ubuntu2204_rule_1_4_1: false
cis_ubuntu2204_set_boot_pass: false

# Ensure authentication required for single user mode
cis_ubuntu2204_rule_1_4_3: false

# Ensure all AppArmor Profiles are in enforce or complain mode
# NOTE: will perform Profiles as complain mode
cis_ubuntu2204_rule_1_6_1_3: false
# Ensure all AppArmor Profiles are enforcing
# NOTE: will perform Profiles as enforcing mode
cis_ubuntu2204_rule_1_6_1_4: false

# cis define to deny all outgoing traffic and whitelist all needed
# default here is changed to allow all outgoing traffic,
# if you need to be cis conform, set to 'deny'
cis_ubuntu2204_firewall_ufw_outgoing_policy: allow # deny | allow

# active journal upload to remote log collection
# do not forget set related variables 'cis_ubuntu2204_set_journal_upload_*'
cis_ubuntu2204_set_journal_upload: false

# Ensure lockout for failed password attempts is configured
cis_ubuntu2204_rule_5_4_2: false

variable special usable between server and client

check services which will removed or disabled, which maybe needed, for example especial for client usage

# will purge gdm/gui, if needed set to 'true'
# if 'true', recommended configs will perform in rules 1.8.2 - 1.8.10
cis_ubuntu2204_allow_gdm_gui: false

# will disable auto mount, if needed set to 'true'
cis_ubuntu2204_allow_autofs: false

# will disable USB storage, if needed set to 'false'
cis_ubuntu2204_rule_1_1_10: true

# will install and config AIDE, if not needed set to 'false'
cis_ubuntu2204_install_aide: true
cis_ubuntu2204_config_aide: true

# will purge printer service, if need set to 'true'
cis_ubuntu2204_allow_cups: false

# will disable ipv6 complete, if needed set to 'true'
cis_ubuntu2204_required_ipv6: false

variables to check and set for own purpose

# AIDE cron settings
cis_ubuntu2204_aide_cron:
  cron_user: root
  cron_file: aide
  aide_job: "/usr/bin/aide.wrapper --config /etc/aide/aide.conf --check"
  aide_minute: 0
  aide_hour: 5
  aide_day: "*"
  aide_month: "*"
  aide_weekday: "*"

# choose time synchronization
cis_ubuntu2204_time_synchronization_service: chrony # chrony | systemd-timesyncd | ntp
cis_ubuntu2204_time_synchronization_ntp_server: time.cloudflare.com
cis_ubuntu2204_time_synchronization_ntp_fallback_server: ntp.ubuntu.com

# choose firewall
cis_ubuntu2204_firewall: ufw # ufw | nftables | iptables

# put 'null' or list of users
# cron allow users
cis_ubuntu2204_cron_allow_users:
  - root
# at allow users
cis_ubuntu2204_at_allow_users:
  - root

# allows/denies for users/groups (4 possible variables can be used/activated)
# put 'null' or list of users (comma separated user list)
# default set to add ssh as group to allow use ssh (do not forget add group to user)
#cis_ubuntu2204_ssh_allow_users: root,user
cis_ubuntu2204_ssh_allow_groups: ssh
#cis_ubuntu2204_ssh_deny_users: root,user
#cis_ubuntu2204_ssh_deny_groups: root,group

# pw quality policies
cis_ubuntu2204_pwquality:
  - key: "minlen"
    value: "14"
  - key: "dcredit"
    value: "-1"
  - key: "ucredit"
    value: "-1"
  - key: "ocredit"
    value: "-1"
  - key: "lcredit"
    value: "-1"

# NOTE: check the two success values, in CIS-pdf they are defined with '1'
#       but on ubuntu-23.04 it is set per default as '2'
cis_ubuntu2204_remember_reuse: 5
cis_ubuntu2204_encrypt_method: yescrypt # yescrypt | sha512
cis_ubuntu2204_common_auth_success: 2
cis_ubuntu2204_common_password_success: 2

variable rules implemented, but only print information for manual check

# SECTION2 | 2.4 | Ensure rsync service is either not installed or masked
cis_ubuntu2204_rule_2_4: true

# SECTION6 | 6.1.10 | Ensure no unowned files or directories exist
cis_ubuntu2204_rule_6_1_10: true
# SECTION6 | 6.1.11 | Ensure no ungrouped files or directories exist
cis_ubuntu2204_rule_6_1_11: true
# SECTION6 | 6.1.12 | Audit SUID executables
cis_ubuntu2204_rule_6_1_12: true
# SECTION6 | 6.1.13 | Audit SGID executables
cis_ubuntu2204_rule_6_1_13: true
# SECTION6 | 6.2.3 | Ensure all groups in /etc/passwd exist in /etc/group
cis_ubuntu2204_rule_6_2_3: true
# SECTION6 | 6.2.5 | Ensure no duplicate UIDs exist
cis_ubuntu2204_rule_6_2_5: true
# SECTION6 | 6.2.6 | Ensure no duplicate GIDs exist
cis_ubuntu2204_rule_6_2_6: true
# SECTION6 | 6.2.7 | Ensure no duplicate user names exist
cis_ubuntu2204_rule_6_2_7: true
# SECTION6 | 6.2.8 | Ensure no duplicate group names exist
cis_ubuntu2204_rule_6_2_8: true
# SECTION6 | 6.2.9 | Ensure root PATH Integrity
cis_ubuntu2204_rule_6_2_9: true
# SECTION6 | 6.2.10 | Ensure root is the only UID 0 account
cis_ubuntu2204_rule_6_2_10: true

Dependencies

Developed and testes with Ansible 2.14.4

Example Playbook

example usage you can find also here.

- name: CIS | install on clients
  become: true
  remote_user: "{{ ansible_user }}"
  hosts:
    - clients
  roles:
    - role: ansible-cis-ubuntu-2204
      cis_ubuntu2204_section1: true
      cis_ubuntu2204_section2: true
      cis_ubuntu2204_section3: true
      cis_ubuntu2204_section4: true
      cis_ubuntu2204_section5: true
      cis_ubuntu2204_section6: true
      # -------------------------
      cis_ubuntu2204_rule_1_4_1: false # bootloader password
      cis_ubuntu2204_set_boot_pass: false # bootloader password
      cis_ubuntu2204_rule_1_4_3: false # authentication required for single user mode
      # -------------------------
      cis_ubuntu2204_rule_5_4_2: false # lockout for failed password attempts # NOTE: will fail to use password
      # -------------------------
      cis_ubuntu2204_rule_1_6_1_3: false # AppArmor complain mode
      cis_ubuntu2204_rule_1_6_1_4: false # AppArmor enforce mode
      # -------------------------
      cis_ubuntu2204_allow_gdm_gui: true
      cis_ubuntu2204_allow_autofs: true
      cis_ubuntu2204_rule_1_1_10: false # Disable USB Storage
      cis_ubuntu2204_time_synchronization_service: chrony # chrony | systemd-timesyncd | ntp
      cis_ubuntu2204_time_synchronization_ntp_server: '{{ ansible_host_default_ntp | default("time.cloudflare.com")}}'
      cis_ubuntu2204_time_synchronization_ntp_fallback_server: ntp.ubuntu.com
      cis_ubuntu2204_allow_cups: true
      # -------------------------
      cis_ubuntu2204_install_aide: "{{ cis_setup_aide | default(false) | bool }}"
      cis_ubuntu2204_config_aide: "{{ cis_setup_aide | default(false) | bool }}"
      cis_ubuntu2204_aide_cron:
        cron_user: root
        cron_file: aide
        aide_job: "/usr/bin/aide.wrapper --config /etc/aide/aide.conf --check"
        aide_minute: 0
        aide_hour: 5
        aide_day: "*"
        aide_month: "*"
        aide_weekday: "*"
      # -------------------------
      cis_ubuntu2204_required_ipv6: "{{ cis_ipv6_required | default(false) | bool }}"
      cis_ubuntu2204_firewall: ufw
      cis_ubuntu2204_firewall_ufw_outgoing_policy: allow
      # -------------------------
      cis_ubuntu2204_ssh_allow_groups: null
      cis_ubuntu2204_cron_allow_users:
        - root
      cis_ubuntu2204_at_allow_users:
        - root
      cis_ubuntu2204_pwquality:
        - key: "minlen"
          value: "8"
        - key: "dcredit"
          value: "-1"
        - key: "ucredit"
          value: "-1"
        - key: "ocredit"
          value: "-1"
        - key: "lcredit"
          value: "-1"
      # -------------------------

Definitions

Profile

A collection of recommendations for securing a technology or a supporting platform. Most benchmarks include at least a Level 1 and Level 2 Profile. Level 2 extends Level 1 recommendations and is not a standalone profile. The Profile Definitions section in the benchmark provides the definitions as they pertain to the recommendations included for the technology.

For Level 1 and Level 2 and the split into Server and Workstation, are defined by tags in the tasks by:

  • server_l1
  • server_l2
  • workstation_l1
  • workstation_l2

For more specific description see the CIS pdf file on page 18.

CIS - List of Recommendations

# CIS Benchmark Recommendation Set Yes Y/N No
1 Initial Setup x
1.1 Filesystem Configuration x
1.1.1 Disable unused filesystems x
1.1.1.1 Ensure mounting of cramfs filesystems is disabled (Automated) x
1.1.1.2 Ensure mounting of squashfs filesystems is disabled (Automated) x
1.1.1.3 Ensure mounting of udf filesystems is disabled (Automated) x
1.1.2 Configure /tmp x
1.1.2.1 Ensure /tmp is a separate partition (Automated) x
1.1.2.2 Ensure nodev option set on /tmp partition (Automated) x
1.1.2.3 Ensure noexec option set on /tmp partition (Automated) x
1.1.2.4 Ensure nosuid option set on /tmp partition (Automated) x
1.1.3 Configure /var x
1.1.3.1 Ensure separate partition exists for /var (Automated) x
1.1.3.2 Ensure nodev option set on /var partition (Automated) x
1.1.3.3 Ensure nosuid option set on /var partition (Automated) x
1.1.4 Configure /var/tmp x
1.1.4.1 Ensure separate partition exists for /var/tmp (Automated) x
1.1.4.2 Ensure noexec option set on /var/tmp partition (Automated) x
1.1.4.3 Ensure nosuid option set on /var/tmp partition (Automated) x
1.1.4.4 Ensure nodev option set on /var/tmp partition (Automated) x
1.1.5 Configure /var/log x
1.1.5.1 Ensure separate partition exists for /var/log (Automated) x
1.1.5.2 Ensure nodev option set on /var/log partition (Automated) x
1.1.5.3 Ensure noexec option set on /var/log partition (Automated) x
1.1.5.4 Ensure nosuid option set on /var/log partition (Automated) x
1.1.6 Configure /var/log/audit x
1.1.6.1 Ensure separate partition exists for /var/log/audit (Automated) x
1.1.6.2 Ensure noexec option set on /var/log/audit partition (Automated) x
1.1.6.3 Ensure nodev option set on /var/log/audit partition (Automated) x
1.1.6.4 Ensure nosuid option set on /var/log/audit partition (Automated) x
1.1.7 Configure /home x
1.1.7.1 Ensure separate partition exists for /home (Automated) x
1.1.7.2 Ensure nodev option set on /home partition (Automated) x
1.1.7.3 Ensure nosuid option set on /home partition (Automated) x
1.1.8 Configure /dev/shm x
1.1.8.1 Ensure nodev option set on /dev/shm partition (Automated) x
1.1.8.2 Ensure noexec option set on /dev/shm partition (Automated) x
1.1.8.3 Ensure nosuid option set on /dev/shm partition (Automated) x
1.1.9 Disable Automounting (Automated) x
1.1.10 Disable USB Storage (Automated) x
1.2 Configure Software Updates x
1.2.1 Ensure package manager repositories are configured (Manual) x
1.2.2 Ensure GPG keys are configured (Manual) x
1.3 Filesystem Integrity Checking x
1.3.1 Ensure AIDE is installed (Automated) x
1.3.2 Ensure filesystem integrity is regularly checked (Automated) x
1.4 Secure Boot Settings x
1.4.1 Ensure bootloader password is set (Automated) x
1.4.2 Ensure permissions on bootloader config are configured (Automated) x
1.4.3 Ensure authentication required for single user mode (Automated) x
1.5 Additional Process Hardening x
1.5.1 Ensure address space layout randomization (ASLR) is enabled (Automated) x
1.5.2 Ensure prelink is not installed (Automated) x
1.5.3 Ensure Automatic Error Reporting is not enabled (Automated) x
1.5.4 Ensure core dumps are restricted (Automated) x
1.6 Mandatory Access Control x
1.6.1 Configure AppArmor x
1.6.1.1 Ensure AppArmor is installed (Automated) x
1.6.1.2 Ensure AppArmor is enabled in the bootloader configuration (Automated) x
1.6.1.3 Ensure all AppArmor Profiles are in enforce or complain mode (Automated) x
1.6.1.4 Ensure all AppArmor Profiles are enforcing (Automated) x
1.7 Command Line Warning Banners x
1.7.1 Ensure message of the day is configured properly (Automated) x
1.7.2 Ensure local login warning banner is configured properly (Automated) x
1.7.3 Ensure remote login warning banner is configured properly (Automated) x
1.7.4 Ensure permissions on /etc/motd are configured (Automated) x
1.7.5 Ensure permissions on /etc/issue are configured (Automated) x
1.7.6 Ensure permissions on /etc/issue.net are configured (Automated) x
1.8 GNOME Display Manager x
1.8.1 Ensure GNOME Display Manager is removed (Automated) x
1.8.2 Ensure GDM login banner is configured (Automated) x
1.8.3 Ensure GDM disable-user-list option is enabled (Automated) x
1.8.4 Ensure GDM screen locks when the user is idle (Automated) x
1.8.5 Ensure GDM screen locks cannot be overridden (Automated) x
1.8.6 Ensure GDM automatic mounting of removable media is disabled (Automated) x
1.8.7 Ensure GDM disabling automatic mounting of removable media is not overridden (Automated) x
1.8.8 Ensure GDM autorun-never is enabled (Automated) x
1.8.9 Ensure GDM autorun-never is not overridden (Automated) x
1.8.10 Ensure XDCMP is not enabled (Automated) x
1.9 Ensure updates, patches, and additional security software are installed (Manual) x
2 Services x
2.1 Configure Time Synchronization x
2.1.1 Ensure time synchronization is in use x
2.1.1.1 Ensure a single time synchronization daemon is in use (Automated) x
2.1.2 Configure chrony x
2.1.2.1 Ensure chrony is configured with authorized timeserver (Manual) x
2.1.2.2 Ensure chrony is running as user _chrony (Automated) x
2.1.2.3 Ensure chrony is enabled and running (Automated) x
2.1.3 Configure systemd-timesyncd x
2.1.3.1 Ensure systemd-timesyncd configured with authorized timeserver (Manual) x
2.1.3.2 Ensure systemd-timesyncd is enabled and running (Automated) x
2.1.4 Configure ntp x
2.1.4.1 Ensure ntp access control is configured (Automated) x
2.1.4.2 Ensure ntp is configured with authorized timeserver (Manual) x
2.1.4.3 Ensure ntp is running as user ntp (Automated) x
2.1.4.4 Ensure ntp is enabled and running (Automated) x
2.2 Special Purpose Services x
2.2.1 Ensure X Window System is not installed (Automated) x
2.2.2 Ensure Avahi Server is not installed (Automated) x
2.2.3 Ensure CUPS is not installed (Automated) x
2.2.4 Ensure DHCP Server is not installed (Automated) x
2.2.5 Ensure LDAP server is not installed (Automated) x
2.2.6 Ensure NFS is not installed (Automated) x
2.2.7 Ensure DNS Server is not installed (Automated) x
2.2.8 Ensure FTP Server is not installed (Automated) x
2.2.9 Ensure HTTP server is not installed (Automated) x
2.2.10 Ensure IMAP and POP3 server are not installed (Automated) x
2.2.11 Ensure Samba is not installed (Automated) x
2.2.12 Ensure HTTP Proxy Server is not installed (Automated) x
2.2.13 Ensure SNMP Server is not installed (Automated) x
2.2.14 Ensure NIS Server is not installed (Automated) x
2.2.15 Ensure mail transfer agent is configured for local-only mode (Automated) x
2.2.16 Ensure rsync service is either not installed or masked (Automated) x
2.3 Service Clients x
2.3.1 Ensure NIS Client is not installed (Automated) x
2.3.2 Ensure rsh client is not installed (Automated) x
2.3.3 Ensure talk client is not installed (Automated) x
2.3.4 Ensure telnet client is not installed (Automated) x
2.3.5 Ensure LDAP client is not installed (Automated) x
2.3.6 Ensure RPC is not installed (Automated) x
2.4 Ensure nonessential services are removed or masked (Manual) x
3 Network Configuration x
3.1 Disable unused network protocols and devices x
3.1.1 Ensure system is checked to determine if IPv6 is enabled (Manual) x
3.1.2 Ensure wireless interfaces are disabled (Automated) x
3.2 Network Parameters (Host Only) x
3.2.1 Ensure packet redirect sending is disabled (Automated) x
3.2.2 Ensure IP forwarding is disabled (Automated) x
3.3 Network Parameters (Host and Router) x
3.3.1 Ensure source routed packets are not accepted (Automated) x
3.3.2 Ensure ICMP redirects are not accepted (Automated) x
3.3.3 Ensure secure ICMP redirects are not accepted (Automated) x
3.3.4 Ensure suspicious packets are logged (Automated) x
3.3.5 Ensure broadcast ICMP requests are ignored (Automated) x
3.3.6 Ensure bogus ICMP responses are ignored (Automated) x
3.3.7 Ensure Reverse Path Filtering is enabled (Automated) x
3.3.8 Ensure TCP SYN Cookies is enabled (Automated) x
3.3.9 Ensure IPv6 router advertisements are not accepted (Automated) x
3.4 Uncommon Network Protocols x
3.4.1 Ensure DCCP is disabled (Automated) x
3.4.2 Ensure SCTP is disabled (Automated) x
3.4.3 Ensure RDS is disabled (Automated) x
3.4.4 Ensure TIPC is disabled (Automated) x
3.5 Firewall Configuration x
3.5.1 Configure UncomplicatedFirewall x
3.5.1.1 Ensure ufw is installed (Automated) x
3.5.1.2 Ensure iptables-persistent is not installed with ufw (Automated) x
3.5.1.3 Ensure ufw service is enabled (Automated) x
3.5.1.4 Ensure ufw loopback traffic is configured (Automated) x
3.5.1.5 Ensure ufw outbound connections are configured (Manual) x
3.5.1.6 Ensure ufw firewall rules exist for all open ports (Automated) x
3.5.1.7 Ensure ufw default deny firewall policy (Automated) x
3.5.2 Configure nftables x
3.5.2.1 Ensure nftables is installed (Automated) x
3.5.2.2 Ensure ufw is uninstalled or disabled with nftables (Automated) x
3.5.2.3 Ensure iptables are flushed with nftables (Manual) x
3.5.2.4 Ensure a nftables table exists (Automated) x
3.5.2.5 Ensure nftables base chains exist (Automated) x
3.5.2.6 Ensure nftables loopback traffic is configured (Automated) x
3.5.2.7 Ensure nftables outbound and established connections are configured (Manual) x
3.5.2.8 Ensure nftables default deny firewall policy (Automated) x
3.5.2.9 Ensure nftables service is enabled (Automated) x
3.5.2.10 Ensure nftables rules are permanent (Automated) x
3.5.3 Configure iptables x
3.5.3.1 Configure iptables software x
3.5.3.1.1 Ensure iptables packages are installed (Automated) x
3.5.3.1.2 Ensure nftables is not installed with iptables (Automated) x
3.5.3.1.3 Ensure ufw is uninstalled or disabled with iptables (Automated) x
3.5.3.2 Configure IPv4 iptables x
3.5.3.2.1 Ensure iptables default deny firewall policy (Automated) x
3.5.3.2.2 Ensure iptables loopback traffic is configured (Automated) x
3.5.3.2.3 Ensure iptables outbound and established connections are configured (Manual) x
3.5.3.2.4 Ensure iptables firewall rules exist for all open ports (Automated) x
3.5.3.3 Configure IPv6 ip6tables x
3.5.3.3.1 Ensure ip6tables default deny firewall policy (Automated) x
3.5.3.3.2 Ensure ip6tables loopback traffic is configured (Automated) x
3.5.3.3.3 Ensure ip6tables outbound and established connections are configured (Manual) x
3.5.3.3.4 Ensure ip6tables firewall rules exist for all open ports (Automated) x
4 Logging and Auditing x
4.1 Configure System Accounting (auditd) x
4.1.1 Ensure auditing is enabled x
4.1.1.1 Ensure auditd is installed (Automated) x
4.1.1.2 Ensure auditd service is enabled and active (Automated) x
4.1.1.3 Ensure auditing for processes that start prior to auditd is enabled (Automated) x
4.1.1.4 Ensure audit_backlog_limit is sufficient (Automated) x
4.1.2 Configure Data Retention x
4.1.2.1 Ensure audit log storage size is configured (Automated) x
4.1.2.2 Ensure audit logs are not automatically deleted (Automated) x
4.1.2.3 Ensure system is disabled when audit logs are full (Automated) x
4.1.3 Configure auditd rules x
4.1.3.1 Ensure changes to system administration scope (sudoers) is collected (Automated) x
4.1.3.2 Ensure actions as another user are always logged (Automated) x
4.1.3.3 Ensure events that modify the sudo log file are collected (Automated) x
4.1.3.4 Ensure events that modify date and time information are collected (Automated) x
4.1.3.5 Ensure events that modify the system's network environment are collected (Automated) x
4.1.3.6 Ensure use of privileged commands are collected (Automated) x
4.1.3.7 Ensure unsuccessful file access attempts are collected (Automated) x
4.1.3.8 Ensure events that modify user/group information are collected (Automated) x
4.1.3.9 Ensure discretionary access control permission modification events are collected (Automated) x
4.1.3.10 Ensure successful file system mounts are collected (Automated) x
4.1.3.11 Ensure session initiation information is collected (Automated) x
4.1.3.12 Ensure login and logout events are collected (Automated) x
4.1.3.13 Ensure file deletion events by users are collected (Automated) x
4.1.3.14 Ensure events that modify the system's Mandatory Access Controls are collected (Automated) x
4.1.3.15 Ensure successful and unsuccessful attempts to use the chcon command are recorded (Automated) x
4.1.3.16 Ensure successful and unsuccessful attempts to use the setfacl command are recorded (Automated) x
4.1.3.17 Ensure successful and unsuccessful attempts to use the chacl command are recorded (Automated) x
4.1.3.18 Ensure successful and unsuccessful attempts to use the usermod command are recorded (Automated) x
4.1.3.19 Ensure kernel module loading unloading and modification is collected (Automated) x
4.1.3.20 Ensure the audit configuration is immutable (Automated) x
4.1.3.21 Ensure the running and on disk configuration is the same (Manual) x
4.1.4 Configure auditd file access x
4.1.4.1 Ensure audit log files are mode 0640 or less permissive (Automated) x
4.1.4.2 Ensure only authorized users own audit log files (Automated) x
4.1.4.3 Ensure only authorized groups are assigned ownership of audit log files (Automated) x
4.1.4.4 Ensure the audit log directory is 0750 or more restrictive (Automated) x
4.1.4.5 Ensure audit configuration files are 640 or more restrictive (Automated) x
4.1.4.6 Ensure audit configuration files are owned by root (Automated) x
4.1.4.7 Ensure audit configuration files belong to group root (Automated) x
4.1.4.8 Ensure audit tools are 755 or more restrictive (Automated) x
4.1.4.9 Ensure audit tools are owned by root (Automated) x
4.1.4.10 Ensure audit tools belong to group root (Automated) x
4.1.4.11 Ensure cryptographic mechanisms are used to protect the integrity of audit tools (Automated) x
4.2 Configure Logging x
4.2.1 Configure journald x
4.2.1.1 Ensure journald is configured to send logs to a remote log host x
4.2.1.1.1 Ensure systemd-journal-remote is installed (Automated) x
4.2.1.1.2 Ensure systemd-journal-remote is configured (Manual) x
4.2.1.1.3 Ensure systemd-journal-remote is enabled (Manual) x
4.2.1.1.4 Ensure journald is not configured to receive logs from a remote client (Automated) x
4.2.1.2 Ensure journald service is enabled (Automated) x
4.2.1.3 Ensure journald is configured to compress large log files (Automated) x
4.2.1.4 Ensure journald is configured to write logfiles to persistent disk (Automated) x
4.2.1.5 Ensure journald is not configured to send logs to rsyslog (Manual) x
4.2.1.6 Ensure journald log rotation is configured per site policy (Manual) x
4.2.1.7 Ensure journald default file permissions configured (Manual) x
4.2.2 Configure rsyslog x
4.2.2.1 Ensure rsyslog is installed (Automated) x
4.2.2.2 Ensure rsyslog service is enabled (Automated) x
4.2.2.3 Ensure journald is configured to send logs to rsyslog (Manual) x
4.2.2.4 Ensure rsyslog default file permissions are configured (Automated) x
4.2.2.5 Ensure logging is configured (Manual) x
4.2.2.6 Ensure rsyslog is configured to send logs to a remote log host (Manual) x
4.2.2.7 Ensure rsyslog is not configured to receive logs from a remote client (Automated) x
4.2.3 Ensure all logfiles have appropriate permissions and ownership (Automated) x
5 Access, Authentication and Authorization
5.1 Configure time-based job schedulers x
5.1.1 Ensure cron daemon is enabled and running (Automated) x
5.1.2 Ensure permissions on /etc/crontab are configured (Automated) x
5.1.3 Ensure permissions on /etc/cron.hourly are configured (Automated) x
5.1.4 Ensure permissions on /etc/cron.daily are configured (Automated) x
5.1.5 Ensure permissions on /etc/cron.weekly are configured (Automated) x
5.1.6 Ensure permissions on /etc/cron.monthly are configured (Automated) x
5.1.7 Ensure permissions on /etc/cron.d are configured (Automated) x
5.1.8 Ensure cron is restricted to authorized users (Automated) x
5.1.9 Ensure at is restricted to authorized users (Automated) x
5.2 Configure SSH Server x
5.2.1 Ensure permissions on /etc/ssh/sshd_config are configured (Automated) x
5.2.2 Ensure permissions on SSH private host key files are configured (Automated) x
5.2.3 Ensure permissions on SSH public host key files are configured (Automated) x
5.2.4 Ensure SSH access is limited (Automated) x
5.2.5 Ensure SSH LogLevel is appropriate (Automated) x
5.2.6 Ensure SSH PAM is enabled (Automated) x
5.2.7 Ensure SSH root login is disabled (Automated) x
5.2.8 Ensure SSH HostbasedAuthentication is disabled (Automated) x
5.2.9 Ensure SSH PermitEmptyPasswords is disabled (Automated) x
5.2.10 Ensure SSH PermitUserEnvironment is disabled (Automated) x
5.2.11 Ensure SSH IgnoreRhosts is enabled (Automated) x
5.2.12 Ensure SSH X11 forwarding is disabled (Automated) x
5.2.13 Ensure only strong Ciphers are used (Automated) x
5.2.14 Ensure only strong MAC algorithms are used (Automated) x
5.2.15 Ensure only strong Key Exchange algorithms are used (Automated) x
5.2.16 Ensure SSH AllowTcpForwarding is disabled (Automated) x
5.2.17 Ensure SSH warning banner is configured (Automated) x
5.2.18 Ensure SSH MaxAuthTries is set to 4 or less (Automated) x
5.2.19 Ensure SSH MaxStartups is configured (Automated) x
5.2.20 Ensure SSH MaxSessions is set to 10 or less (Automated) x
5.2.21 Ensure SSH LoginGraceTime is set to one minute or less (Automated) x
5.2.22 Ensure SSH Idle Timeout Interval is configured (Automated) x
5.3 Configure privilege escalation x
5.3.1 Ensure sudo is installed (Automated) x
5.3.2 Ensure sudo commands use pty (Automated) x
5.3.3 Ensure sudo log file exists (Automated) x
5.3.4 Ensure users must provide password for privilege escalation (Automated) x
5.3.5 Ensure re-authentication for privilege escalation is not disabled globally (Automated) x
5.3.6 Ensure sudo authentication timeout is configured correctly (Automated) x
5.3.7 Ensure access to the su command is restricted (Automated) x
5.4 Configure PAM x
5.4.1 Ensure password creation requirements are configured (Automated) x
5.4.2 Ensure lockout for failed password attempts is configured (Automated) x
5.4.3 Ensure password reuse is limited (Automated) x
5.4.4 Ensure password hashing algorithm is up to date with the latest standards (Automated) x
5.4.5 Ensure all current passwords uses the configured hashing algorithm (Manual) x
5.5 User Accounts and Environment x
5.5.1 Set Shadow Password Suite Parameters x
5.5.1.1 Ensure minimum days between password changes is configured (Automated) x
5.5.1.2 Ensure password expiration is 365 days or less (Automated) x
5.5.1.3 Ensure password expiration warning days is 7 or more (Automated) x
5.5.1.4 Ensure inactive password lock is 30 days or less (Automated) x
5.5.1.5 Ensure all users last password change date is in the past (Automated) x
5.5.2 Ensure system accounts are secured (Automated) x
5.5.3 Ensure default group for the root account is GID 0 (Automated) x
5.5.4 Ensure default user umask is 027 or more restrictive (Automated) x
5.5.5 Ensure default user shell timeout is 900 seconds or less (Automated) x
6 System Maintenance x
6.1 System File Permissions x
6.1.1 Ensure permissions on /etc/passwd are configured (Automated) x
6.1.2 Ensure permissions on /etc/passwd- are configured (Automated) x
6.1.3 Ensure permissions on /etc/group are configured (Automated) x
6.1.4 Ensure permissions on /etc/group- are configured (Automated) x
6.1.5 Ensure permissions on /etc/shadow are configured (Automated) x
6.1.6 Ensure permissions on /etc/shadow- are configured (Automated) x
6.1.7 Ensure permissions on /etc/gshadow are configured (Automated) x
6.1.8 Ensure permissions on /etc/gshadow- are configured (Automated) x
6.1.9 Ensure no world writable files exist (Automated) x
6.1.10 Ensure no unowned files or directories exist (Automated) x
6.1.11 Ensure no ungrouped files or directories exist (Automated) x
6.1.12 Audit SUID executables (Manual) x
6.1.13 Audit SGID executables (Manual) x
6.2 Local User and Group Settings x
6.2.1 Ensure accounts in /etc/passwd use shadowed passwords (Automated) x
6.2.2 Ensure /etc/shadow password fields are not empty (Automated) x
6.2.3 Ensure all groups in /etc/passwd exist in /etc/group (Automated) x
6.2.4 Ensure shadow group is empty (Automated) x
6.2.5 Ensure no duplicate UIDs exist (Automated) x
6.2.6 Ensure no duplicate GIDs exist (Automated) x
6.2.7 Ensure no duplicate user names exist (Automated) x
6.2.8 Ensure no duplicate group names exist (Automated) x
6.2.9 Ensure root PATH Integrity (Automated) x
6.2.10 Ensure root is the only UID 0 account (Automated) x
6.2.11 Ensure local interactive user home directories exist (Automated) x
6.2.12 Ensure local interactive users own their home directories (Automated) x
6.2.13 Ensure local interactive user home directories are mode 750 or more restrictive (Automated) x
6.2.14 Ensure no local interactive user has .netrc files (Automated) x
6.2.15 Ensure no local interactive user has .forward files (Automated) x
6.2.16 Ensure no local interactive user has .rhosts files (Automated) x
6.2.17 Ensure local interactive user dot files are not group or world writable (Automated) x

License

MIT

Resources

ansible-cis-ubuntu-2204's People

Contributors

mvladislav avatar

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