Details

Configure SELINUX to be enabled at boot time and verify that it has not been overwritten by the grub boot parameters.

Note: This recommendation is designed around the grub bootloader, if LILO or another bootloader is in use in your environment enact equivalent settings.

Rationale:

SELinux must be enabled at boot time in your grub configuration to ensure that the controls it provides are not overridden.

Solution

Edit /boot/grub/grub.conf, or on UEFI systems edit /boot/efi/EFI/*/grub.conf, and remove all instances of selinux=0 and enforcing=0 on all kernel lines.

Supportive Information

The following resource is also helpful.

• https://workbench.cisecurity.org/files/3148https://workbench.cisecurity.org/files/3148

This security hardening control applies to the following category of controls within NIST 800-53: Access Control.This control applies to the following type of system Unix.

References

• 800-53|AC-3
• CSCv6|14.4
• CSCv7|14.6

Source

• Tenable.com/audits