openstack-ansible-security/doc/source/developer-notes/V-38645.rst

Exception

Ubuntu's default umask setting in /etc/login.defs is 022, but the STIG requires 077 to be set. Since changing umask settings can disrupt some systems, this change requires a deployer to opt-in.

To opt-in for this change and adjust the umask, the Ansible variable umask_login_defs must be set to 077.