The system must be configured to ignore NetBIOS name release requests except from WINS servers.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-4116	WN08-SO-000043	SV-48126r1_rule	ECSC-1	Low

Description
Configuring the system to ignore name release requests, except from WINS servers, prevents a denial of service (DoS) attack. The DoS consists of sending a NetBIOS name release request to the server for each entry in the server's cache, causing a response delay in the normal operation of the servers WINS resolution capability.

STIG	Date
Windows 8 / 8.1 Security Technical Implementation Guide	2015-06-16

Details

Check Text ( C-44852r1_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. (See "Updating the Windows Security Options File" in the STIG Overview document if MSS settings are not visible in the system's policy tools.) If the value for "MSS: (NoNameReleaseOnDemand) Allow computer to ignore NetBIOS name release requests except from WINS servers" is not set to "Enabled", this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\Netbt\Parameters\ Value Name: NoNameReleaseOnDemand Value Type: REG_DWORD Value: 1 Note: The NetBIOS name for the system will no longer appear under 'My Network Places'.

Check Text ( C-44852r1_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.

(See "Updating the Windows Security Options File" in the STIG Overview document if MSS settings are not visible in the system's policy tools.)

If the value for "MSS: (NoNameReleaseOnDemand) Allow computer to ignore NetBIOS name release requests except from WINS servers" is not set to "Enabled", this is a finding.

The policy referenced configures the following registry value:

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

Value Name: NoNameReleaseOnDemand

Value Type: REG_DWORD
Value: 1

Note: The NetBIOS name for the system will no longer appear under 'My Network Places'.

Fix Text (F-41263r1_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "MSS: (NoNameReleaseOnDemand) Allow computer to ignore NetBIOS name release requests except from WINS servers" to "Enabled".