TOSS 5 must prevent a user from overriding the disabling of the graphical user interface autorun function.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-282500 | TOSS-05-000267 | SV-282500r1200480_rule | CCI-000778 | medium |
| Description | ||||
| Techniques used to address this include protocols using nonces (e.g., numbers generated for a specific one-time use) or challenges (e.g., TLS, WS_Security). Additional techniques include time-synchronous or challenge-response one-time authenticators. Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163 | ||||
| STIG | Date | |||
| Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide | 2026-04-01 | |||
Details
Check Text (C-282500r1200480_chk)
Verify TOSS 5 disables the user's ability to override the graphical user interface autorun setting.
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.
Determine which profile the system database is using by running the following command:
$ sudo grep system-db /etc/dconf/profile/user
system-db:local
Check that the automount setting is locked from nonprivileged user modification using the following command:
Note: The example below is using the database "local" for the system, so the path is "/etc/dconf/db/local.d". This path must be modified if a database other than "local" is being used.
$ grep 'autorun-never' /etc/dconf/db/local.d/locks/*
/org/gnome/desktop/media-handling/autorun-never
If the command does not return at least the example result, this is a finding.
Fix Text (F-86966r1200479_fix)
Configure the GNOME desktop to not allow a user to change the setting that disables autorun on removable media.
Add the following line to "/etc/dconf/db/local.d/locks/00-security-settings-lock" to prevent user modification:
/org/gnome/desktop/media-handling/autorun-never
Update the dconf system databases:
$ sudo dconf update