Internet Sharing must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-59763	AOSX-10-001270	SV-74193r1_rule		Medium

Description
In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/protocols on information systems. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component. To support the requirements and principles of least functionality, the operating system must support the organizational requirements providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues. Internet Sharing must be disabled.

Description

In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/protocols on information systems. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component. To support the requirements and principles of least functionality, the operating system must support the organizational requirements providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues. Internet Sharing must be disabled.

STIG	Date
Apple OS X 10.10 (Yosemite) Workstation Security Technical Implementation Guide	2017-04-06

Details

Check Text ( C-60533r2_chk )
To check if the 'Internet Sharing' service is disabled, use the following command: sudo launchctl print-disabled system \| grep com.apple.NetworkSharing If the results do not show the following: "com.apple.NetworkSharing" => true this is a finding.

Fix Text (F-65173r1_fix)
To disable the 'Internet Sharing' service, run the following command: sudo launchctl disable system/com.apple.NetworkSharing The system may need to be restarted for the update to take effect.