Title

Non system-created file shares on a system must limit access to groups that require it. (Cat II impact)

Discussion

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.

Check Content

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

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.

Additional Identifiers

Rule ID: SV-226249r794543_rule

Vulnerability ID: V-226249

Group Title: SRG-OS-000138-GPOS-00069

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.