The Red Hat Enterprise Linux operating system must disable the graphical user interface automounter unless required.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-100023	RHEL-07-020111	SV-109127r1_rule		Medium

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, SRG-OS-000480-GPOS-00227

STIG	Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide	2020-05-15

Details

Check Text ( C-98873r1_chk )
Verify the operating system disables the ability to automount devices in a graphical user interface. 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. Check to see if automounter service is disabled with the following commands: # cat /etc/dconf/db/local.d/00-No-Automount [org/gnome/desktop/media-handling] automount=false automount-open=false autorun-never=true If the output does not match the example above, this is a finding. # cat /etc/dconf/db/local.d/locks/00-No-Automount /org/gnome/desktop/media-handling/automount /org/gnome/desktop/media-handling/automount-open /org/gnome/desktop/media-handling/autorun-never If the output does not match the example, this is a finding.

Check Text ( C-98873r1_chk )

Verify the operating system disables the ability to automount devices in a graphical user interface.

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.

Check to see if automounter service is disabled with the following commands:
# cat /etc/dconf/db/local.d/00-No-Automount

[org/gnome/desktop/media-handling]

automount=false

automount-open=false

autorun-never=true

If the output does not match the example above, this is a finding.

# cat /etc/dconf/db/local.d/locks/00-No-Automount

/org/gnome/desktop/media-handling/automount

/org/gnome/desktop/media-handling/automount-open

/org/gnome/desktop/media-handling/autorun-never
If the output does not match the example, this is a finding.

Fix Text (F-105707r1_fix)
Configure the graphical user interface to disable the ability to automount devices. 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. Create or edit the /etc/dconf/db/local.d/00-No-Automount file and add the following: [org/gnome/desktop/media-handling] automount=false automount-open=false autorun-never=true Create or edit the /etc/dconf/db/local.d/locks/00-No-Automount file and add the following: /org/gnome/desktop/media-handling/automount /org/gnome/desktop/media-handling/automount-open /org/gnome/desktop/media-handling/autorun-never Run the following command to update the database: # dconf update

Fix Text (F-105707r1_fix)

Configure the graphical user interface to disable the ability to automount devices.

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.

Create or edit the /etc/dconf/db/local.d/00-No-Automount file and add the following:

[org/gnome/desktop/media-handling]

automount=false

automount-open=false

autorun-never=true

Create or edit the /etc/dconf/db/local.d/locks/00-No-Automount file and add the following:
/org/gnome/desktop/media-handling/automount

/org/gnome/desktop/media-handling/automount-open

/org/gnome/desktop/media-handling/autorun-never

Run the following command to update the database:

# dconf update