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Repository Details

Ansible role for Red Hat 6 DISA STIG

RHEL 6 DISA STIG

Galaxy

Configure RHEL 6 to be DISA STIG compliant. CAT I findings will be corrected by default. CAT II and CAT III findings can be corrected by setting the appropriate variable to enable those tasks.

Not all findings can be remediated automatically, or they require more complex automation specific to your environment in order to be remediated appropriately. See comments in tasks/cat1.yml, tasks/cat2.yml, tasks/cat3.yml for these findings.

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 for system hardening before or after an audit has been conducted.

Installing from Ansible Galaxy

To install this role with ansible-galaxy use the following command:

ansible-galaxy install -p roles nousdefions.STIG-RHEL6

Based on Red Hat Enterprise Linux 6 STIG Version 1 Release 18 - 2018-01-26.

This repo originated from work done by Sam Doran

Requirements

You should have a general understanding of the nature of the changes this role will make to the system. See the DISA IASE site for details.

Role Variables

There are many role variables defined in defaults/main.yml. Here are the most important ones. Feel free to look through defaults/main.yml to see what other configuration options are available.

Name Default Value Description
rhel6stig_cat1 yes Correct CAT I findings
rhel6stig_cat2 no Correct CAT II findings
rhel6stig_cat3 no Correct CAT III findings
rhel6stig_snmp_community B0re4lis SNMP community string
rhel6stig_pass_min_length 15 Minimum password length
rhel6stig_pass_min_days 1 Minimum password age in days
rhel6stig_pass_max_days 60 Maximum password age in days
rhel6stig_pass_reuse 60 Maximum password age in days
rhel6stig_pam_unix_params sha512 shadow try_first_pass use_authtok remember=24 PAM auth parameters
rhel6stig_pam_cracklib_params pam_unix.so try_first_pass PAM auth parameters
rhel6stig_pam_auth_sufficient try_first_pass retry=3 maxrepeat=3 minlen={{ rhel6stig_pass_min_length }} dcredit=-1 ucredit=-1 ocredit=-1 lcredit=-1 difok=4 PAM cracklib parameters
rhel6stig_selinux_pol targeted SELinux policy to apply
rhel6stig_antivirus_required no Whether Anti-virus is required. To enable this you should configure the AV package settings as well.
rhel6stig_av_package complex AV Package settings
rhel6stig_gpg_key_loc complex GPG Key Location (URL or on disk)
rhel6stig_use_dhcp yes Whether the system should use DHCP or Static IPs.
rhel6stig_update_all_packages yes Perform a yum update for all packages.
rhel6stig_maxlogins 10 Max number of simultaneous system logins.
rhel6stig_root_email_address [email protected] Address where system email is sent.
rhel6stig_xwindows_required no Whether or not X Windows is is use on target systems. Disables some changes if X Windows is not in use.
rhel6stig_ipv6_required yes Whether or not IPv6 is in use of the target system.
rhel6stig_tftp_required no Whether or not TFTP is required. If set to yes, this will prevent the removal of tftp and tftp-server packages. It will also reconfigure the tftp-server to run securely.
rhel6stig_rhnsatellite_required no Whether or not Red Hat Satellite is required in the environment. If not required, rhnsd will be stopped and disabled.
rhel6stig_system_is_router no Whether on not the target system is acting as a router. Skips tasks that would break the system if it is a acting as a router
rhel6stig_bootloader_password [Randomly generated and encrypted string] The new GRUB password to use.
rhel6stig_login_banner [DOD banner] Banner used in /etc/issue and /etc/issue.net

Dependencies

python-jmespath

Example Playbooks

Correct CAT I and CAT II findings but don't apply all updates.

- hosts: all
  become: yes

  vars:
    rhel6stig_update_all_packages: no

  roles:
    - role: nousdefions.STIG-RHEL6
      rhel6stig_cat1: yes
      rhel6stig_cat2: yes
      rhel6stig_cat3: no
      when:
          - ansible_os_family == 'RedHat'
          - ansible_distribution_major_version | version_compare('6', '=')

Prompt for the GRUB password.

- hosts: servers
  become: yes

  vars:
    rhel6stig_update_all_packages: no

  vars:
    rhel6stig_cat1: yes
    rhel6stig_cat2: yes
    rhel6stig_cat3: no

  vars_prompt:
    name: "rhel6stig_bootloader_password"
    prompt: "Enter the bootloader password: "
    private: yes
    confirm: yes

  roles:
     - role: nousdefions.STIG-RHEL6

Tags

Each task is tagged with its category, severity, whether or not it is a patch or audit task, and the finding ID, e.g., V-38462. In addition to these four basic tags that all tasks have, there are human-friendly tags such as "ssh" or "dod_logon_banner".

A number of preliminary tasks that do things such as enumerate services on the system and check for the existence of various files will always run unless explicitly skipped by using --skip tags prelim_tasks.

Some examples of using tags:

# Only run tasks that secure ssh
ansible-playbook site.yml --tags ssh

# Don't change SNMP or postfix
ansible-playbook site.yml --skip-tags postfix,mail,snmp

License

MIT

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