Non system-created file shares on a system must limit access to groups that require it.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-226249	WN12-GE-000018	SV-226249r569184_rule		Medium

Description
Shares on a system provide network access. To prevent exposing sensitive information, where shares are necessary, permissions must be reconfigured to give the minimum access to those accounts that require it.

STIG	Date
Microsoft Windows Server 2012/2012 R2 Domain Controller Security Technical Implementation Guide	2021-03-05

Details

Check Text ( C-27951r476591_chk )
If only system-created shares such as "ADMIN$", "C$", and "IPC$" exist on the system, this is NA. (System-created shares will display a message that it has been shared for administrative purposes when "Properties" is selected.) Run "Computer Management". Navigate to System Tools >> Shared Folders >> Shares. Right click any non-system-created shares. Select "Properties". Select the "Share Permissions" tab. If the file shares have not been reconfigured to restrict permissions to the specific groups or accounts that require access, this is a finding. Select the "Security" tab. If the NTFS permissions have not been reconfigured to restrict permissions to the specific groups or accounts that require access, this is a finding.

Check Text ( C-27951r476591_chk )

If only system-created shares such as "ADMIN$", "C$", and "IPC$" exist on the system, this is NA.
(System-created shares will display a message that it has been shared for administrative purposes when "Properties" is selected.)

Run "Computer Management".
Navigate to System Tools >> Shared Folders >> Shares.

Right click any non-system-created shares.
Select "Properties".
Select the "Share Permissions" tab.

If the file shares have not been reconfigured to restrict permissions to the specific groups or accounts that require access, this is a finding.

Select the "Security" tab.

If the NTFS permissions have not been reconfigured to restrict permissions to the specific groups or accounts that require access, this is a finding.

Fix Text (F-27939r476592_fix)
If a non-system-created share is required on a system, configure the share and NTFS permissions to limit access to the specific groups or accounts that require it. Remove any unnecessary non-system-created shares.