Apple iOS must use SSL for Exchange Active Sync.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-54287	AIOS-03-080101	SV-68533r1_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.1.1 #42

STIG	Date
Apple iOS 8 Interim Security Configuration Guide	2014-09-16

Details

Check Text ( C-54923r3_chk )
Review configuration settings to confirm “Use SSL” for the Exchange account is enabled. This check procedure is performed on both the iOS management tool and the iOS device. Note: If an organization has multiple configuration profiles, then the check procedure must be performed on the relevant configuration profiles applicable to the scope of the review. In the 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 iOS device: 1. Open the Settings app. 2. Tap "General". 3. Tap "Profiles" or "Profiles & Device Management" or "Device Management". 4. Tap the Configuration Profile from the 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 iOS management tool, "SSL" appears in the configuration profile, or the Exchange policy on the iOS device from the iOS management tool has "SSL" set to "No", this is a finding.

Check Text ( C-54923r3_chk )

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

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

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

In the 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 iOS device:
1. Open the Settings app.
2. Tap "General".
3. Tap "Profiles" or "Profiles & Device Management" or "Device Management".
4. Tap the Configuration Profile from the 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 iOS management tool, "SSL" appears in the configuration profile, or the Exchange policy on the iOS device from the iOS management tool has "SSL" set to "No", this is a finding.

Fix Text (F-59141r1_fix)
Install a Configuration Profile to use SSL for Exchange Active Sync.