RHEL 6 DISA STIG

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 tasks/not_automated.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 after an audit has been conducted, though auditing functionality is in the works.

IMPORTANT INSTALL STEP

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

ansible-galaxy install -p roles nousdefions.STIG-RHEL6,$TAG Where $TAG represents a git tag of this repo, for example v0.9

Based on Red Hat Enterprise Linux 6 STIG Version 1 Release 6 - 2015-01-23.

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[1].

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_use_dhcp	yes	Whether the system should use DHCP or Static IPs.
rhel6stig_system_is_router	no	Whether on not the target system is acting as a router. Disables settings that would break the system if it is a acting as a router
rhel6stig_root_email_address	foo@baz.com	Address where system email is sent.
rhel6stig_xwindows_required	no	Whether or not X Windows is is use on taregt systems. Disables some changes if X Windows is not in use.
rhel6stig_ipv6_in_use	no	Whether or not ipv6 is in use of the target system. This is set automatically to 'yes' if ipv6 is found to be in use. (Default: false)
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_bootloader_password	[Randomly generated and encrypted string]	The new grub password to use if rhel6stig_change_grub_password is True
rhel6stig_update_all_packages	yes	Whether to install all system updates.

Dependencies

None.

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
      }

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

Some examples of using tags:

# Only remediate ssh
ansible-playbook site.yml --tags ssh

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

License

MIT

1: A web based STIG viewer is available here. They are not associated in any way with DISA but have provided a useful tool for viewing the STIGs.