STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

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

DISA Rule

SV-282498r1200474_rule

Vulnerability Number

V-282498

Group Title

SRG-OS-000114-GPOS-00059

Rule Version

TOSS-05-000264

Severity

CAT II

CCI(s)

CCI-000778 - Uniquely identify organization-defined devices and/or types of devices before establishing a local, remote, and/or network connection.
CCI-001958 - Authenticate organization-defined devices and/or types of devices before establishing a local, remote, and/or network connection.

Weight

Fix Recommendation

Configure the GNOME desktop to disable automated mounting of 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]
automount-open=false

Update the dconf system databases:

$ sudo dconf update

Check Contents

Verify TOSS 5 disables the graphical user interface automount 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 automount-open

false

If "automount-open" is set to "true" and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Vulnerability Number

V-282498

Documentable

False

Rule Version

TOSS-05-000264

Severity Override Guidance

Check Content Reference

Target Key

5738