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The macOS system must disable Internet Sharing.


Overview

Finding ID Version Rule ID IA Controls Severity
V-259483 APPL-14-002007 SV-259483r941071_rule Medium
Description
If the system does not require Internet Sharing, support for it is nonessential and must be disabled. The information system must be configured to provide only essential capabilities. Disabling Internet sharing helps prevent the unauthorized connection of devices, unauthorized transfer of information, and unauthorized tunneling.
STIG Date
Apple macOS 14 (Sonoma) Security Technical Implementation Guide 2024-01-10

Details

Check Text ( C-63222r941069_chk )
Verify the macOS system is configured to disable Internet Sharing with the following command:

/usr/bin/osascript -l JavaScript << EOS
$.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')\
.objectForKey('forceInternetSharingOff').js
EOS

If the result is not "true", this is a finding.
Fix Text (F-63130r941070_fix)
Configure the macOS system to disable Internet Sharing by installing the "com.apple.MCX" configuration profile.