Apple iOS/iPadOS 17 must implement the management setting: use SSL for Exchange ActiveSync.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-258348	AIOS-17-011300	SV-258348r927727_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/iPadOS 17 Security Technical Implementation Guide	2023-10-10

Details

Check Text ( C-62089r927725_chk )
Review configuration settings to confirm "Use SSL" for the Exchange account is enabled for incoming mail. 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 "Use SSL for incoming mail" is checked under the Exchange payload. On the iPhone and iPad: 1. Open the Settings app. 2. Tap "General". 3. Tap "VPN & Device Management". 4. Tap the Configuration Profile from the Apple iOS/iPadOS management tool containing the Exchange policy. 5. Tap "Mail". 6. Tap the name of the Exchange account. 7. Verify "SSL for incoming mail" is set to "Yes". If "Use SSL for incoming mail" is unchecked in the Apple iOS/iPadOS management tool or the Exchange policy on the iPhone and iPad has "SSL for incoming mail" set to "No", this is a finding.

Check Text ( C-62089r927725_chk )

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

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 "Use SSL for incoming mail" is checked under the Exchange payload.

On the iPhone and iPad:
1. Open the Settings app.
2. Tap "General".
3. Tap "VPN & Device Management".
4. Tap the Configuration Profile from the Apple iOS/iPadOS management tool containing the Exchange policy.
5. Tap "Mail".
6. Tap the name of the Exchange account.
7. Verify "SSL for incoming mail" is set to "Yes".

If "Use SSL for incoming mail" is unchecked in the Apple iOS/iPadOS management tool or the Exchange policy on the iPhone and iPad has "SSL for incoming mail" set to "No", this is a finding.

Fix Text (F-62013r927726_fix)
Install a configuration profile to use SSL for Exchange ActiveSync incoming mail.