TOSS 5 must disable the graphical user interface autorun function unless required.

Allowing autorun commands to execute may introduce malicious code to a system. Configuring this setting prevents users from executing autorun commands.

Verify TOSS 5 disables the graphical user interface autorun function using the following command:

Note: This requirement assumes the use of the TOSS 5 default graphical user interface—the GNOME desktop environment. If the system does not have a graphical user interface installed, this requirement is not applicable.

$ gsettings get org.gnome.desktop.media-handling autorun-never 

true

If "autorun-never" is set to "false" and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Configure the GNOME desktop to disable the autorun function on removable media.

The dconf settings can be edited in the /etc/dconf/db/* location.

Update the [org/gnome/desktop/media-handling] section of the "/etc/dconf/db/local.d/00-security-settings" database file and add or update the following lines:

[org/gnome/desktop/media-handling] autorun-never=true

Update the dconf system databases:

$ sudo dconf update