Samsung Android must be configured to disable USB mass storage mode.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-99943	KNOX-10-003400	SV-109047r1_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 #39a

STIG	Date
Samsung Android OS 10 with Knox 3.x Security Technical Implementation Guide	2020-03-24

Details

Check Text ( C-98793r1_chk )
Review Samsung Android configuration settings to determine if the mobile device has a USB mass storage mode and if it has been disabled. For KPE(AE) deployments this configuration is the default configuration. If the management tool does not provide the capability to configure "USB file transfer", there is NO finding because the default setting cannot be changed. This validation procedure is performed on both the management tool Administration Console and the Samsung Android device. On the management tool, in the device restrictions section, verify that "USB file transfer" has been set to "Disallow". On the PC, browse the mounted Samsung Android device and verify that it does not display any folders or files. If on the management tool "USB file transfer" is not set to "Disallow", or the PC can mount and browse folders and files on the Samsung Android device, this is a finding.

Check Text ( C-98793r1_chk )

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

For KPE(AE) deployments this configuration is the default configuration. If the management tool does not provide the capability to configure "USB file transfer", there is NO finding because the default setting cannot be changed.

This validation procedure is performed on both the management tool Administration Console and the Samsung Android device.

On the management tool, in the device restrictions section, verify that "USB file transfer" has been set to "Disallow".

On the PC, browse the mounted Samsung Android device and verify that it does not display any folders or files.

If on the management tool "USB file transfer" is not set to "Disallow", or the PC can mount and browse folders and files on the Samsung Android device, this is a finding.

Fix Text (F-105627r1_fix)
Configure Samsung Android to disable USB mass storage mode. For KPE(AE) deployments this configuration is the default configuration. No configuration is required. On the management tool, in the device restrictions section, set "USB file transfer" to "Disallow".