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APPL-26-002100 The macOS system must disable Media Sharing.

DISA STIG library V1R4
All changes in this version
first version loaded CAT II

Maps to AC-3 via CCI-000213

Title

The macOS system must disable Media Sharing.

Control

Verify the macOS system is configured to disable Media Sharing with the following commands: /usr/bin/osascript -l JavaScript << EOS function run() { let pref1 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowMediaSharing')) let pref2 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowMediaSharingModification')) if ( pref1 == false && pref2 == false ) { return("true") } else { return("false") } } EOS If the result is not "true", this is a finding.

Discussion

Media Sharing must be disabled. When Media Sharing is enabled, the computer starts a network listening service that shares the contents of the user's music collection with other users in the same subnet. The information system must be configured to provide only essential capabilities. Disabling Media Sharing helps prevent the unauthorized connection of devices and unauthorized transfer of information. Disabling Media Sharing mitigates this risk. Note: The Media Sharing preference panel will still allow "Home Sharing" and "Share media with guests" to be checked, but the service will not be enabled.

Related controls

CCI-000213

Fix

Configure the macOS system to disable Media Sharing by installing the "com.apple.applicationaccess" configuration profile.