The system must prevent the root account from logging in from serial consoles.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-50725	OL6-00-000028	SV-64931r1_rule		Low

Description
Preventing direct root login to serial port interfaces helps ensure accountability for actions taken on the systems using the root account.

STIG	Date
Oracle Linux 6 Security Technical Implementation Guide	2016-06-05

Details

Check Text ( C-53209r1_chk )
To check for serial port entries which permit root login, run the following command: # grep '^ttyS[0-9]' /etc/securetty If any output is returned, then root login over serial ports is permitted. If root login over serial ports is permitted, this is a finding.

Fix Text (F-55521r1_fix)
To restrict root logins on serial ports, ensure lines of this form do not appear in "/etc/securetty": ttyS0 ttyS1 Note: Serial port entries are not limited to those listed above. Any lines starting with "ttyS" followed by numerals should be removed.