Description Configure SELINUX to be enabled at boot time and verify that it has not been overwritten by the grub boot parameters. Rationale SELinux must be enabled at boot time in your grub configuration to ensure that the controls it provides are not overridden. Audit Run the following command and verify that no linux line has the selinux=0 or enforcing=0 parameters set: # grep "^s*linux" /boot/grub2/grub.cfg Remediation Edit /etc/default/grub and remove all instances of selinux=0 and enforcing=0 from all CMDLINE_LINUX parameters: GRUB_CMDLINE_LINUX_DEFAULT="quiet" GRUB_CMDLINE_LINUX="" Run the following command to update the grub2 configuration: # grub2-mkconfig > /boot/grub2/grub.cfg Notes This recommendation is designed around the grub bootloader, if LILO or another bootloader is in use in your environment enact equivalent settings.

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Edit /etc/default/grub and remove all instances of selinux=0 and enforcing=0 from all CMDLINE_LINUX parameters: GRUB_CMDLINE_LINUX_DEFAULT="quiet" GRUB_CMDLINE_LINUX="" Run the following command to update the grub2 configuration: # grub2-mkconfig /boot/grub2/grub.cfg