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The Red Hat Enterprise Linux operating system must be configured so that the x86 Ctrl-Alt-Delete key sequence is disabled on the command line.


Overview

Finding ID Version Rule ID IA Controls Severity
V-204455 RHEL-07-020230 SV-204455r833106_rule High
Description
A locally logged-on user who presses Ctrl-Alt-Delete, when at the console, can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot. In the GNOME graphical environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken.
STIG Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide 2022-12-06

Details

Check Text ( C-4579r833104_chk )
Verify the operating system is not configured to reboot the system when Ctrl-Alt-Delete is pressed.

Check that the ctrl-alt-del.target is masked and not active with the following command:

$ sudo systemctl status ctrl-alt-del.target

ctrl-alt-del.target
Loaded: masked (/dev/null; bad)
Active: inactive (dead)

If the ctrl-alt-del.target is not masked, this is a finding.

If the ctrl-alt-del.target is active, this is a finding.
Fix Text (F-4579r833105_fix)
Configure the system to disable the Ctrl-Alt-Delete sequence for the command line with the following commands:

$ sudo systemctl disable ctrl-alt-del.target

$ sudo systemctl mask ctrl-alt-del.target