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UBTU-22-611060 Ubuntu 22.04 LTS must not allow accounts configured with blank or null passwords.

DISA STIG library V2R10
All changes in this version
first version loaded CAT I

Maps to CM-6 via CCI-000366

Title

Ubuntu 22.04 LTS must not allow accounts configured with blank or null passwords.

Control

Verify that null passwords cannot be used. Run the following command: $ grep nullok /etc/pam.d/common-auth /etc/pam.d/common-password If this produces any output, this is a finding.

Discussion

If an account has an empty password, anyone could log on and run commands with the privileges of that account. Accounts with empty passwords must never be used in operational environments.

Related controls

CCI-000366

Fix

Remove any instances of the "nullok" option in "/etc/pam.d/common-password" to prevent logons with empty passwords. Remove any instances of the "nullok" option in "/etc/pam.d/common-auth" and "/etc/pam.d/common-password".