Check: RHEL-09-271070
RHEL 9 STIG:
RHEL-09-271070
(in version v2 r3)
Title
RHEL 9 must prevent a user from overriding the session idle-delay setting for the graphical user interface. (Cat II impact)
Discussion
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 logout 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, the GNOME desktop can be configured to identify when a user's session has idled and take action to initiate the session lock. As such, users should not be allowed to change session settings. Satisfies: SRG-OS-000029-GPOS-00010, SRG-OS-000031-GPOS-00012
Check Content
Note: This requirement assumes the use of the RHEL 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 RHEL 9 prevents a user from overriding settings for graphical user interfaces. $ gsettings writable org.gnome.desktop.session idle-delay false If "idle-delay" is writable and the result is "true", this is a finding.
Fix Text
Configure RHEL 9 to prevent a user from overriding settings for graphical user interfaces. Create a database to contain the systemwide screensaver settings (if it does not already exist) with the following command: Note: The example below is using the database "local" for the system. If the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory. $ sudo touch /etc/dconf/db/local.d/locks/session Add the following setting to prevent nonprivileged users from modifying it: /org/gnome/desktop/session/idle-delay Run the following command to update the database: $ sudo dconf update
Additional Identifiers
Rule ID: SV-258024r1045100_rule
Vulnerability ID: V-258024
Group Title: SRG-OS-000029-GPOS-00010
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000057 |
Prevent further access to the system by initiating a device lock after organization-defined time period of inactivity; and/or requiring the user to initiate a device lock before leaving the system unattended. |
| CCI-000060 |
Conceal, via the device lock, information previously visible on the display with a publicly viewable image. |