Set Existing Passwords Warning Age
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Description
To configure how many days prior to password expiration that a warning will be issued to
users, run the command:
$ sudo chage --warndays 7
USER
The DoD requirement is 7, and CIS recommendation is no less than 7 days.
This profile requirement is 7.
Rationale
Providing an advance warning that a password will be expiring gives users
time to think of a secure password. Users caught unaware may choose a simple
password or write it down where it may be discovered.
Shell script
The following script can be run on the host to remediate the issue.
#!/bin/bash
var_accounts_password_warn_age_login_defs='7'
while IFS= read -r i; do
chage --warndays $var_accounts_password_warn_age_login_defs $i
done < <(awk -v var="$var_accounts_password_warn_age_login_defs" -F: '(($6 < var || $6 == "") && $2 ~ /^\$/) {print $1}' /etc/shadow)
Ansible playbook
The following playbook can be run with Ansible to remediate the issue.
- name: XCCDF Value var_accounts_password_warn_age_login_defs # promote to variable
set_fact:
var_accounts_password_warn_age_login_defs: !!str 7
tags:
- always
- name: Set Existing Passwords Warning Age - Collect Users With Incorrect Number of
Days of Warning Before Password Expires
ansible.builtin.command:
cmd: awk -F':' '(($6 < {{ var_accounts_password_warn_age_login_defs }} || $6 ==
"") && $2 ~ /^\$/) {print $1}' /etc/shadow
register: result_pass_warn_age_user_names
changed_when: false
tags:
- CCE-86913-1
- NIST-800-53-CM-6(a)
- NIST-800-53-IA-5(1)(d)
- NIST-800-53-IA-5(f)
- PCI-DSSv4-8.3.9
- accounts_password_set_warn_age_existing
- configure_strategy
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Set Existing Passwords Warning Age - Ensure the Number of Days of Warning
Before Password Expires
ansible.builtin.command:
cmd: chage --warndays {{ var_accounts_password_warn_age_login_defs }} {{ item
}}
with_items: '{{ result_pass_warn_age_user_names.stdout_lines }}'
when: result_pass_warn_age_user_names is not skipped and result_pass_warn_age_user_names.stdout_lines
| length > 0
tags:
- CCE-86913-1
- NIST-800-53-CM-6(a)
- NIST-800-53-IA-5(1)(d)
- NIST-800-53-IA-5(f)
- PCI-DSSv4-8.3.9
- accounts_password_set_warn_age_existing
- configure_strategy
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
