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Apple iOS must use SSL for Exchange Active Sync.


Finding ID Version Rule ID IA Controls Severity
V-54287 AIOS-03-080101 SV-68533r1_rule Medium
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
Apple iOS 8 Interim Security Configuration Guide 2014-09-16


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.