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

Apple iOS/iPadOS must implement the management setting: not allow messages in an ActiveSync Exchange account to be forwarded or moved to other accounts in the Apple iOS/iPadOS Mail app.

DISA Rule

SV-228760r619923_rule

Vulnerability Number

V-228760

Group Title

PP-MDF-991000

Rule Version

AIOS-14-009800

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.
• CCI-000764 - The information system uniquely identifies and authenticates organizational users (or processes acting on behalf of organizational users).
• CCI-000370 - The organization employs automated mechanisms to centrally manage configuration settings for organization-defined information system components.

Weight

10

Fix Recommendation

Install a configuration profile to prevent Exchange messages from being moved or forwarded between email accounts.

Check Contents

Review configuration settings to confirm "Allow messages to be moved" is disabled.

This check procedure is performed on both the Apple iOS/iPadOS 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 Apple iOS/iPadOS management tool, verify "Allow messages to be moved" is unchecked under the Exchange payload.

Alternatively, verify the text "<key>PreventMove</key><true/>" appears in the configuration profile (.mobileconfig file).

On the iPhone and iPad:
1. Open the Settings app.
2. Tap "General".
3. Tap "Profiles & Device Management" or "Profiles".
4. Tap the Configuration Profile from the Apple iOS/iPadOS management tool containing the Exchange policy.
5. Tap "Accounts".
6. Tap the "name of the Exchange account".
7. Verify "Prevent Move" is set to "Yes".

If "Allow messages to be moved" is checked in the Apple iOS/iPadOS management tool, "<key>PreventMove</key><false/>" appears in the configuration profile, or the Exchange policy on the iPhone and iPad has "Prevent Move" set to "No", this is a finding.

Vulnerability Number

V-228760

Documentable

False

Rule Version

AIOS-14-009800

Severity Override Guidance

Review configuration settings to confirm "Allow messages to be moved" is disabled.

This check procedure is performed on both the Apple iOS/iPadOS 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 Apple iOS/iPadOS management tool, verify "Allow messages to be moved" is unchecked under the Exchange payload.

Alternatively, verify the text "<key>PreventMove</key><true/>" appears in the configuration profile (.mobileconfig file).

On the iPhone and iPad:
1. Open the Settings app.
2. Tap "General".
3. Tap "Profiles & Device Management" or "Profiles".
4. Tap the Configuration Profile from the Apple iOS/iPadOS management tool containing the Exchange policy.
5. Tap "Accounts".
6. Tap the "name of the Exchange account".
7. Verify "Prevent Move" is set to "Yes".

If "Allow messages to be moved" is checked in the Apple iOS/iPadOS management tool, "<key>PreventMove</key><false/>" appears in the configuration profile, or the Exchange policy on the iPhone and iPad has "Prevent Move" set to "No", this is a finding.

Check Content Reference

M

Target Key

4231

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