The system must require users to re-authenticate to unlock a graphical desktop environment.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-216336 | SRG-OS-000028 | SOL-11.1-040170 | SV-216336r958400_rule | 2024-11-25 | 3 |
| Description |
|---|
| Allowing access to a graphical environment when the user is not attending the system can allow unauthorized users access to the system. |
| ℹ️ Check |
|---|
| If the system is not running XWindows, this check does not apply. Determine if the screen saver timeout is configured properly. # grep "^\*timeout:" /usr/share/X11/app-defaults/XScreenSaver If the output is not: *timeout: 0:15:00 or a shorter time interval, this is a finding. # grep "^\*lockTimeout:" /usr/share/X11/app-defaults/XScreenSaver If the output is not: *lockTimeout: 0:00:05 or a shorter time interval, this is a finding. # grep "^\*lock:" /usr/share/X11/app-defaults/XScreenSaver If the output is not: *lock: True this is a finding. For each existing user, check the configuring of their personal .xscreensaver file. # grep "^timeout:" $HOME/.xscreensaver If the output is not: timeout: 0:15:00 or a shorter time interval, this is a finding. # grep "^lockTimeout:" $HOME/.xscreensaver If the output is not: lockTimeout: 0:00:05 or a shorter time interval, this is a finding. # grep "^lock:" $HOME/.xscreensaver If the output is not: lock: True this is a finding. |
| ✔️ Fix |
|---|
| The root role is required. Edit the global screensaver configuration file to ensure 15 minute screen lock. # pfedit /usr/share/X11/app-defaults/XScreenSaver Find the timeout control lines and change them to read: *timeout: 0:15:00 *lockTimeout: 0:00:05 *lock: True For each user on the system, edit their local $HOME/.xscreensaver file and change the timeout values. # pfedit $HOME/.xscreensaver Find the timeout control lines and change them to read: timeout: 0:15:00 lockTimeout: 0:00:05 lock: True |