The macOS system must disable iCloud Keychain synchronization.

From Apple OS X 10.13 Security Technical Implementation Guide

SV-96337r1_rule The macOS system must disable iCloud Keychain synchronization.

Vulnerability discussion

Requiring individuals to be authenticated with an individual authenticator prior to using a group authenticator allows for traceability of actions, as well as adding an additional level of protection of the actions that can be taken with group account knowledge.Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000370-GPOS-00155

Check content

To view the setting for the iCloud Keychain Synchronization configuration, run the following command: /usr/sbin/system_profiler SPConfigurationProfileDataType | /usr/bin/grep allowCloudKeychainSync If the output is null or not "allowCloudKeychainSync = 0" this is a finding.

Fix text

This setting is enforced using the "Restrictions" configuration profile.

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