Title

The macOS system must disable the iCloud Calendar services. (Cat II impact)

Discussion

The macOS built-in Calendar.app connection to Apple's iCloud service must be disabled. Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, automated calendar synchronization must be controlled by an organization approved service.

Check Content

Verify the macOS system is configured to disable iCloud Calendar services with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudCalendar').js EOS If the result is not "false", this is a finding.

Fix Text

Configure the macOS system to disable iCloud Calendar services by installing the "com.apple.applicationaccess" configuration profile.

Additional Identifiers

Rule ID: SV-259487r941083_rule

Vulnerability ID: V-259487

Group Title: SRG-OS-000095-GPOS-00049

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.