TOSS 5 must disable the graphical user interface automount function unless required.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-282498 | SRG-OS-000114-GPOS-00059 | TOSS-05-000264 | SV-282498r1200474_rule | 2026-04-01 | 1 |
Description
Automatically mounting file systems permits easy introduction of unknown devices, thereby facilitating malicious activity.
Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163
ℹ️ Check
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.
✔️ Fix
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