AlmaLinux OS 9 must disable the ability of a user to accidentally press Ctrl-Alt-Del and cause a system to shut down or reboot.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-269187 | SRG-OS-000480-GPOS-00227 | ALMA-09-012230 | SV-269187r1050069_rule | 2025-02-20 | 1 |
| Description |
|---|
| A locally logged-in user who presses Ctrl-Alt-Del, when at the console, can reboot the system. If accidentally pressed, as could happen in the case of mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot. |
| ℹ️ Check |
|---|
| Note: This requirement assumes the use of the AlmaLinux OS 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. Verify AlmaLinux OS 9 is configured to ignore the Ctrl-Alt-Del sequence in the GNOME desktop with the following command: $ gsettings get org.gnome.settings-daemon.plugins.media-keys logout "['']" If the GNOME desktop is configured to shut down when Ctrl-Alt-Del is pressed, this is a finding. |
| ✔️ Fix |
|---|
| Configure AlmaLinux OS 9 to ignore the Ctrl-Alt-Del sequence in the GNOME desktop. Add or update the [org/gnome/settings-daemon/plugins/media-keys] section of the /etc/dconf/db/local.d/00-security-settings database file and add or update the following lines: [org/gnome/settings-daemon/plugins/media-keys] logout=[''] Run the following command to update the database: $ dconf update |