Details

Guest access to shared Server Message Block (SMB) folders _MUST_ be disabled.

Turning off guest access prevents anonymous users from accessing files shared via SMB.

Solution

Run the following bash code

/usr/sbin/sysadminctl -smbGuestAccess off
----

mobileconfig profile info:

com.apple.smb.server:
  AllowGuestAccess:
    False

Supportive Information

The following resource is also helpful.

• https://github.com/usnistgov/macos_security

This security hardening control applies to the following category of controls within NIST 800-53: Access Control, Identification and Authentication.This control applies to the following type of system Unix.

References

• 800-53|AC-2
• 800-53|AC-2(9)
• 800-53|IA-2
• CCE|CCE-84761-6

Source

• Tenable.com/audits