Detections
Analytics
ALMA-09-012340 - AlmaLinux OS 9 must prevent a user from overriding the Ctrl-Alt-Del sequence settings for the graphical user interface.
Information
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.Solution
Configure AlmaLinux OS 9 to disallow the user changing the Ctrl-Alt-Del sequence in the GNOME desktop.Create a database to contain systemwide graphical user logon settings (if it does not already exist) with the following command:
$ touch /etc/dconf/db/local.d/locks/session
Add the following line to the session locks file to prevent nonprivileged users from modifying the Ctrl-Alt-Del setting:
/org/gnome/settings-daemon/plugins/media-keys/logout
Run the following command to update the database:
$ dconf update
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_CL_AlmaLinux_OS_9_V1R6_STIG.zip
Item Details
Audit Name: DISA Cloud Linux AlmaLinux OS 9 STIG v1r6
Category: CONFIGURATION MANAGEMENT
References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-269188r1184093_rule, STIG-ID|ALMA-09-012340, Vuln-ID|V-269188
Plugin: Unix
Control ID: 4a59cff64be5e55db0664dd80cf3ce2f1f26370e5c4f08b48d00a03979f70ba7