Detections
Analytics

1.8 RHEL-09-211045

Information

The systemd Ctrl-Alt-Delete burst key sequence in RHEL 9 must be disabled.

GROUP ID: V-257784
RULE ID: SV-257784r1044832

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 a graphical user environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken.

Satisfies: SRG-OS-000324-GPOS-00125, SRG-OS-000480-GPOS-00227

Solution

Configure the system to disable the CtrlAltDelBurstAction by added or modifying the following line in the "/etc/systemd/system.conf" configuration file:

CtrlAltDelBurstAction=none

Reload the daemon for this change to take effect.

$ sudo systemctl daemon-reload

See Also

https://workbench.cisecurity.org/benchmarks/22008

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-6(10), CAT|I, CCI|CCI-002235, Rule-ID|SV-257784r1044832_rule, STIG-ID|RHEL-09-211045, Vuln-ID|V-257784

Plugin: Unix

Control ID: 56e975fbf932e918426c841636e71df2f41a8f118eeb64d268fda497c55107b5