Apple iOS must implement the management setting: use SSL for Exchange ActiveSync.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-81825	AIOS-12-011500	SV-96539r1_rule		Medium

Description
Exchange email messages are a form of data in transit and thus are vulnerable to eavesdropping and man-in-the-middle attacks. Secure Sockets Layer (SSL), also referred to as Transport Layer Security (TLS), provides encryption and authentication services that mitigate the risk of breach. SFR ID: FMT_SMF_EXT.1.1 #47

STIG	Date
Apple iOS 12 Security Technical Implementation Guide	2018-11-28

Details

Check Text ( C-81617r1_chk )
Review configuration settings to confirm "Use SSL" for the Exchange account is enabled. This check procedure is performed on both the Apple iOS management tool and the Apple iOS device. 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 management tool, verify "Use SSL" is checked under the Exchange payload. Alternatively, verify the text "SSL" appears in the configuration profile (.mobileconfig file). On the Apple iOS device: 1. Open the Settings app. 2. Tap "General". 3. Tap "Profiles & Device Management". 4. Tap the Configuration Profile from the Apple iOS management tool containing the Exchange policy. 5. Tap "Accounts". 6. Tap the name of the Exchange account. 7. Verify "SSL" is set to "Yes". If "Use SSL" is unchecked in the Apple iOS management tool, "SSL" appears in the configuration profile, or the Exchange policy on the Apple iOS device from the Apple iOS management tool has "SSL" set to "No", this is a finding.

Check Text ( C-81617r1_chk )

Review configuration settings to confirm "Use SSL" for the Exchange account is enabled.

This check procedure is performed on both the Apple iOS management tool and the Apple iOS device.

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 management tool, verify "Use SSL" is checked under the Exchange payload.

Alternatively, verify the text "SSL" appears in the configuration profile (.mobileconfig file).

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

If "Use SSL" is unchecked in the Apple iOS management tool, "SSL" appears in the configuration profile, or the Exchange policy on the Apple iOS device from the Apple iOS management tool has "SSL" set to "No", this is a finding.

Fix Text (F-88675r1_fix)
Install a configuration profile to use SSL for Exchange ActiveSync.