Details

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.

Solution

run the following command to configure GRUB and PAM and to create /.autorelabel

# selinux-activate

Edit /etc/default/grub and add the following parameters to the GRUB_CMDLINE_LINUX= line:

selinux=1
security=selinux

example:

GRUB_CMDLINE_LINUX_DEFAULT=’quiet’
GRUB_CMDLINE_LINUX=’selinux=1 security=selinux enforcing=1 audit=1′

Run the following command to update the grub2 configuration:

# update-grub

Notes:

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

Supportive Information

The following resource is also helpful.

• https://workbench.cisecurity.org/files/2619

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
• CSCv7|14.6

Source

• Tenable.com/audits