Set Existing Passwords Maximum Age
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Description
Configure non-compliant accounts to enforce a 365-day maximum password lifetime
restriction by running the following command:
Rationale
Any password, no matter how complex, can eventually be cracked. Therefore,
passwords need to be changed periodically. If the operating system does
not limit the lifetime of passwords and force users to change their
passwords, there is the risk that the operating system passwords could be
compromised.
Shell script
The following script can be run on the host to remediate the issue.
#!/bin/bash
var_accounts_maximum_age_login_defs='365'
while IFS= read -r i; do
chage -M $var_accounts_maximum_age_login_defs $i
done < <(awk -v var="$var_accounts_maximum_age_login_defs" -F: '(/^[^:]+:[^!*]/ && ($5 > var || $5 == "")) {print $1}' /etc/shadow)