STIGQter: STIG Summary: Apple iOS/iPadOS 14 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 23 Apr 2021:

Apple iOS/iPadOS must disable "Allow USB drive access in Files app" if the AO has not approved the use of DoD-approved USB storage drives with iOS/iPadOS devices.

DISA Rule

SV-228778r619923_rule

Vulnerability Number

V-228778

Group Title

PP-MDF-991000

Rule Version

AIOS-14-011700

Severity

CAT II

CCI(s)

• CCI-000097 - The organization restricts or prohibits the use of organization-controlled portable storage devices by authorized individuals on external information systems.
• CCI-000370 - The organization employs automated mechanisms to centrally manage configuration settings for organization-defined information system components.
• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

If the AO has not approved the use of USB drives to load files to Apple devices, install a configuration profile to disable "Allow USB drive access in Files app".

Check Contents

This requirement is not applicable if the AO has approved the use of USB drives to load files to Apple devices. The approval must be in writing and include which USB storage devices are approved for use.

If the AO has not approved the use of USB drives to load files to Apple devices, use the following procedures for verifying compliance:

This a supervised-only control. If the iPhone or iPad being reviewed is not supervised by the MDM, this control is automatically a finding.

If the iPhone or iPad being reviewed is supervised by the MDM, review configuration settings to confirm "Allow USB drive access in Files app" is disabled.

This check procedure is performed on both the device management tool and the iPhone and iPad.

Note: If an organization has multiple configuration profiles, the check procedure must be performed on the relevant configuration profiles applicable to the scope of the review.

In the iOS management tool, verify "Allow USB drive access in Files app" is unchecked.

On the iPhone and iPad device:
1. Open the Settings app.
2. Tap "General".
3. Tap "Profiles & Device Management" or "Profiles".
4. Tap the Configuration Profile from the iOS management tool containing the restrictions policy.
5. Tap "Restrictions".
6. Verify "Allow USB drive access in Files app" is not listed.

If "Allow USB drive access in Files app" is not disabled in both the management tool and on the Apple device, this is a finding.

Vulnerability Number

V-228778

Documentable

False

Rule Version

AIOS-14-011700

Severity Override Guidance

This requirement is not applicable if the AO has approved the use of USB drives to load files to Apple devices. The approval must be in writing and include which USB storage devices are approved for use.

If the AO has not approved the use of USB drives to load files to Apple devices, use the following procedures for verifying compliance:

This a supervised-only control. If the iPhone or iPad being reviewed is not supervised by the MDM, this control is automatically a finding.

If the iPhone or iPad being reviewed is supervised by the MDM, review configuration settings to confirm "Allow USB drive access in Files app" is disabled.

This check procedure is performed on both the device management tool and the iPhone and iPad.

Note: If an organization has multiple configuration profiles, the check procedure must be performed on the relevant configuration profiles applicable to the scope of the review.

In the iOS management tool, verify "Allow USB drive access in Files app" is unchecked.

On the iPhone and iPad device:
1. Open the Settings app.
2. Tap "General".
3. Tap "Profiles & Device Management" or "Profiles".
4. Tap the Configuration Profile from the iOS management tool containing the restrictions policy.
5. Tap "Restrictions".
6. Verify "Allow USB drive access in Files app" is not listed.

If "Allow USB drive access in Files app" is not disabled in both the management tool and on the Apple device, this is a finding.

Check Content Reference

M

Target Key

4231

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