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.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-269187 | ALMA-09-012230 | SV-269187r1050069_rule | CCI-000366 | medium |
| 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. | ||||
| STIG | Date | |||
| Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide | 2026-02-27 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-6
1.00
- DISA · V1R6 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.4.1
1.00
- DISA · V1R6 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.4.2
1.00
- DISA · V1R6 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000366
1.00
- DISA · V1R6 · disa_xccdf · related
Details
Check Text (C-269187r1050069_chk)
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 Text (F-73119r1049283_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