InformationThe operating system must initiate a session lock for graphical user interfaces when the screensaver is activated. Please ensure the screensaver contains the lock delay system wide setting.
A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, operating systems need to be able to identify when a user's session has idled and take action to initiate the session lock.
SolutionConfigure the operating system to initiate a session lock for graphical user interfaces when a screensaver is activated.
Create a database to contain the system-wide screensaver settings (if it does not already exist) with the following command:
# touch /etc/dconf/db/local.d/locks/00-screensaver
Edit /etc/dconf/db/local.d/locks/00-screensaver and add or update the following lines:
Add the setting to enable session locking when a screensaver is activated:
The uint32 must be included along with the integer key values as shown.
Update the system databases:
# dconf update
Users must log out and back in again before the system-wide settings take effect.
This Benchmark recommendation maps to:
Red Hat Enterprise Linux 7 Security Technical Implementation Guide:
Version 2, Release: 3 Benchmark Date: 26 Apr 2019
Vul ID: V-71901
Rule ID: SV-86525r3_rule
STIG ID: RHEL-07-010110
Severity: CAT II