Google Android 12 must be configured to disable USB mass storage mode.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-250432	GOOG-12-008400	SV-250432r802812_rule		Medium

Description
USB mass storage mode enables the transfer of data and software from one device to another. This software can include malware. When USB mass storage is enabled on a mobile device, it becomes a potential vector for malware and unauthorized data exfiltration. Prohibiting USB mass storage mode mitigates this risk. SFR ID: FMT_SMF_EXT.1.1 #39

STIG	Date
Google Android 12 COPE Security Technical Implementation Guide	2021-09-17

Details

Check Text ( C-53867r802660_chk )
Review managed Google Android 12 device configuration settings to determine if the mobile device has a USB mass storage mode and whether it has been disabled. This validation procedure is performed on both the EMM Administration Console and the managed Google Android 12 device. On the EMM console: COBO: 1. Open "User restrictions". 2. Open "Set user restrictions". 3. Verify that "Disallow USB file transfer" is toggled to ON. COPE: 1. Open "User restrictions". 2. Open "Set user restrictions on parent". 3. Verify that "Disallow USB file transfer" is toggled to ON. ______________________________ On the managed Google Android 12 device: 1. Plug a USB cable into the managed Google Android 12 device and connect to a non-DoD network-managed PC. 2. Go to Settings >> Connected devices >> USB. 3. Verify that "No data transfer" is selected. If the EMM console device policy is not set to disable USB mass storage mode or on the managed Google Android 12 device, the device policy is not set to disable USB mass storage mode, this is a finding.

Check Text ( C-53867r802660_chk )

Review managed Google Android 12 device configuration settings to determine if the mobile device has a USB mass storage mode and whether it has been disabled.

This validation procedure is performed on both the EMM Administration Console and the managed Google Android 12 device.

On the EMM console:

COBO:

1. Open "User restrictions".
2. Open "Set user restrictions".
3. Verify that "Disallow USB file transfer" is toggled to ON.

COPE:

1. Open "User restrictions".
2. Open "Set user restrictions on parent".
3. Verify that "Disallow USB file transfer" is toggled to ON.
______________________________

On the managed Google Android 12 device:

1. Plug a USB cable into the managed Google Android 12 device and connect to a non-DoD network-managed PC.
2. Go to Settings >> Connected devices >> USB.
3. Verify that "No data transfer" is selected.

If the EMM console device policy is not set to disable USB mass storage mode or on the managed Google Android 12 device, the device policy is not set to disable USB mass storage mode, this is a finding.

Fix Text (F-53821r802811_fix)
Configure the Google Android 12 device to disable USB mass storage mode. On the EMM console: COBO: 1. Open "User restrictions". 2. Open "Set user restrictions". 3. Toggle "Disallow USB file transfer" to ON. COPE: 1. Open "User restrictions". 2. Open "Set user restrictions on parent". 3. Toggle "Disallow USB file transfer" to ON.