29 lines
810 B
ReStructuredText
29 lines
810 B
ReStructuredText
---
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id: V-38497
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status: implemented
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tag: misc
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---
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Ubuntu 14.04, Ubuntu 16.04, and CentOS 7 allow accounts with null passwords to
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authenticate via PAM by default. This STIG requires that those login attempts
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are blocked.
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For Ubuntu, the ``nullok_secure`` option will be removed from ``/etc/pam.d
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/common-auth``.
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For CentOS, the ``nullok`` option will be removed from ``/etc/pam.d/system-
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auth``.
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The effects of the change are **immediate** and no service restarts are
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required.
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Deployers can opt-out of this change by adjusting an Ansible variable:
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.. code-block:: yaml
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security_pam_remove_nullok: no
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Setting the variable to ``yes`` (the default) will cause the Ansible tasks to
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remove the ``nullok_secure`` parameter while setting the variable to ``no``
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will leave the PAM configuration unchanged.
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