Network shares that can be accessed anonymously must not be allowed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-3340	WN08-SO-000059	SV-48071r1_rule		High

Description
Anonymous access to network shares provides the potential for gaining unauthorized system access by network users. This could lead to the exposure or corruption of sensitive data.

STIG	Date
Windows 8/8.1 Security Technical Implementation Guide	2017-02-27

Details

Check Text ( C-44810r1_chk )
Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.) Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for "Network access: Shares that can be accessed anonymously" includes any entries, this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\LanManServer\Parameters\ Value Name: NullSessionShares Value Type: REG_MULTI_SZ Value: (Blank)

Check Text ( C-44810r1_chk )

Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.)
Expand the Security Configuration and Analysis tree view.
Navigate to Local Policies -> Security Options.

If the value for "Network access: Shares that can be accessed anonymously" includes any entries, this is a finding.

The policy referenced configures the following registry value:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \System\CurrentControlSet\Services\LanManServer\Parameters\

Value Name: NullSessionShares

Value Type: REG_MULTI_SZ
Value: (Blank)

Fix Text (F-41209r1_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Network access: Shares that can be accessed anonymously" to be defined but containing no entries (blank).