Verify that Interactive Boot is Disabled
An XCCDF Rule
Description
Red Hat Enterprise Linux CoreOS 4 systems support an "interactive boot" option that can
be used to prevent services from being started. On a Red Hat Enterprise Linux CoreOS 4
system, interactive boot can be enabled by providing a 1,
yes, true, or on value to the
systemd.confirm_spawn kernel argument in /etc/default/grub.
Remove any instance of
systemd.confirm_spawn=(1|yes|true|on)from the kernel arguments in that file to disable interactive boot. Recovery booting must also be disabled. Confirm that
GRUB_DISABLE_RECOVERY=true is set in /etc/default/grub.
It is also required to change the runtime configuration, run:
/sbin/grubby --update-kernel=ALL --remove-args="systemd.confirm_spawn"
grub2-mkconfig -o /boot/grub2/grub.cfg
Rationale
Using interactive or recovery boot, the console user could disable auditing, firewalls, or other services, weakening system security.
- ID
- xccdf_org.ssgproject.content_rule_grub2_disable_interactive_boot
- Severity
- Medium
- References
- Updated