From Samsung Android OS 6 (with KNOX 2.x) Security Technical Implementation Guide
Part of PP-MDF-991000
Associated with: CCI-000366
The USB host storage feature allows the device to connect to select USB devices (e.g., USB flash drives, USB mouse, USB keyboard) using a micro USB to USB adapter cable. A user can copy sensitive DoD information to external USB storage unencrypted, resulting in compromise of DoD data. Disabling this feature mitigates the risk of compromising sensitive DoD data.
This validation procedure is performed on both the MDM Administration Console and the Samsung KNOX for Android device. Check whether the appropriate setting is configured on the MDM Administration Console: 1. Ask the MDM administrator to display the "USB host storage" setting in the "Android Restrictions" rule. 2. Verify the setting is disabled. On the Samsung KNOX for Android device: 1. Connect a Micro USB to USB OTG adaptor to the device. 2. Connect a USB thumb drive to the adaptor. 3. Verify the device cannot access the USB thumb drive. If the "USB host storage" configuration in the MDM console is enabled, or if the user is able to access the USB thumb drive from the device, this is a finding.
Configure the mobile operating system to disable USB host storage. On the MDM Administration Console, disable the "USB host storage" setting in the "Android Restrictions" rule.
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