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XCCDF
Guide to the Secure Configuration of Ubuntu 18.04
System Settings
Account and Access Control
Protect Accounts by Restricting Password-Based Login
Verify Proper Storage and Existence of Password Hashes
Prevent Login to Accounts With Empty Password
Prevent Login to Accounts With Empty Password
An XCCDF Rule
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Prevent Login to Accounts With Empty Password
High Severity
If an account is configured for password authentication but does not have an assigned password, it may be possible to log into the account without authentication. Remove any instances of the
nullok
in
/etc/pam.d/common-password
to prevent logins with empty passwords.