The Red Hat Enterprise Linux operating system must require authentication upon booting into single-user and maintenance modes.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-77823	RHEL-07-010481	SV-92519r2_rule		Medium

Description
If the system does not require valid root authentication before it boots into single-user or maintenance mode, anyone who invokes single-user or maintenance mode is granted privileged access to all files on the system.

STIG	Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide	2018-11-28

Details

Check Text ( C-77441r2_chk )
Verify the operating system must require authentication upon booting into single-user and maintenance modes. Check that the operating system requires authentication upon booting into single-user mode with the following command: # grep -i execstart /usr/lib/systemd/system/rescue.service \| grep -i sulogin ExecStart=-/bin/sh -c "/usr/sbin/sulogin; /usr/bin/systemctl --fail --no-block default" If "ExecStart" does not have "/usr/sbin/sulogin" as an option, this is a finding.

Check Text ( C-77441r2_chk )

Verify the operating system must require authentication upon booting into single-user and maintenance modes.

Check that the operating system requires authentication upon booting into single-user mode with the following command:

# grep -i execstart /usr/lib/systemd/system/rescue.service | grep -i sulogin

ExecStart=-/bin/sh -c "/usr/sbin/sulogin; /usr/bin/systemctl --fail --no-block default"

If "ExecStart" does not have "/usr/sbin/sulogin" as an option, this is a finding.

Fix Text (F-84523r2_fix)
Configure the operating system to require authentication upon booting into single-user and maintenance modes. Add or modify the "ExecStart" line in "/usr/lib/systemd/system/rescue.service" to include "/usr/sbin/sulogin": ExecStart=-/bin/sh -c "/usr/sbin/sulogin; /usr/bin/systemctl --fail --no-block default"