Detections
Analytics

1.314 OL09-00-002412

Information

OL 9 must be configured so that the systemd Ctrl-Alt-Delete burst key sequence is disabled.

GROUP ID: V-271751
RULE ID: SV-271751r1184206

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.

Solution

Configure OL 9 to disable the CtrlAltDelBurstAction by adding it to a drop file in a "/etc/systemd/system.conf.d/" configuration file:

If no drop file exists, create one with the following command:

$ sudo mkdir -p /etc/systemd/system.conf.d && sudo vi /etc/systemd/system.conf.d/55-CtrlAltDel-BurstAction.conf

Edit the file to contain the setting by adding the following text:

CtrlAltDelBurstAction=none

Reload the daemon for this change to take effect.

$ sudo systemctl daemon-reload

See Also

https://workbench.cisecurity.org/benchmarks/27024

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-6(10), CCI|CCI-002235, Rule-ID|SV-271751r1184206_rule, STIG-ID|OL09-00-002412, Vuln-ID|V-271751

Plugin: Unix

Control ID: 27fbce6931da1d6df80bff168d72783382d6f30fd7ff988412956385f2b7dc4e