The Samsung KNOX for Android platform must enforce an application installation policy by disabling application installation from unknown sources.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-69605	KNOX-35-009010	SV-84227r1_rule		Medium

Description
Forcing all applications to be installed from authorized application repositories can prevent unauthorized and malicious applications from being installed and executed on mobile devices. Allowing such installations and executions could cause a compromise of DoD data accessible by these unauthorized/malicious applications. SFR ID: FMT_SMF_EXT.1.1 #10a

STIG	Date
Samsung Android OS 6 (with KNOX 2.x) Security Technical Implementation Guide	2016-11-14

Details

Check Text ( C-70041r1_chk )
Configuring an application installation policy on Samsung KNOX for Android by specifying an application repository involves two steps: 1. Disabling Google Play 2. Disabling unknown application sources This validation procedure covers the second of these steps. It is performed on both the MDM Administration Console and the Samsung KNOX for Android device. On the MDM Administration Console: 1. Ask the MDM administrator to display the "Allow Unknown Sources" settings in the "Android Restrictions" rule. 2. Verify it is disabled. On the Samsung KNOX for Android device: 1. Open the device settings. 2. Select "Lock screen and security". 3. Attempt to enable "Unknown sources". 4. Verify it cannot be enabled. If the "Allow Unknown Sources" setting is not disabled, or if a user can successfully enable "Unknown sources" on the device, this is a finding.

Check Text ( C-70041r1_chk )

Configuring an application installation policy on Samsung KNOX for Android by specifying an application repository involves two steps:
1. Disabling Google Play
2. Disabling unknown application sources

This validation procedure covers the second of these steps. It is performed on both the MDM Administration Console and the Samsung KNOX for Android device.

On the MDM Administration Console:
1. Ask the MDM administrator to display the "Allow Unknown Sources" settings in the "Android Restrictions" rule.
2. Verify it is disabled.

On the Samsung KNOX for Android device:
1. Open the device settings.
2. Select "Lock screen and security".
3. Attempt to enable "Unknown sources".
4. Verify it cannot be enabled.

If the "Allow Unknown Sources" setting is not disabled, or if a user can successfully enable "Unknown sources" on the device, this is a finding.

Fix Text (F-75795r1_fix)
Configure the mobile operating system to disable unauthorized application repositories. Configure the mobile operating system to disable application installations from unknown sources. On the MDM Administration Console, disable "Allow Unknown Sources" in the "Android Restrictions" rule.