RHEL 9 must prevent a user from overriding the disabling of the graphical user interface automount function.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-258015 | RHEL-09-271025 | SV-258015r1045086_rule | CCI-000778 | medium |
| Description | ||||
| A nonprivileged account is any operating system account with authorizations of a nonprivileged user. Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227 | ||||
| STIG | Date | |||
| Red Hat Enterprise Linux 9 Security Technical Implementation Guide | 2025-05-14 | |||
Details
Check Text (C-258015r1045086_chk)
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 disables the ability of the user to override the graphical user interface automount setting.
Determine which profile the system database is using with 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 with 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 'automount-open' /etc/dconf/db/local.d/locks/*
/org/gnome/desktop/media-handling/automount-open
If the command does not return at least the example result, this is a finding.
Fix Text (F-61680r926031_fix)
Configure the GNOME desktop to not allow a user to change the setting that disables automated mounting of 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/automount-open
Then update the dconf system databases:
$ sudo dconf update