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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 WN12-SO-000043 SV-52928r2_rule 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 Server 2012/2012 R2 Domain Controller Security Technical Implementation Guide 2020-06-16

Details

Check Text ( C-47233r3_chk )
If the following registry value does not exist or is not configured as specified, this is a finding:

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

Value Name: NoNameReleaseOnDemand

Value Type: REG_DWORD
Value: 1
Fix Text (F-45854r3_fix)
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "MSS: (NoNameReleaseOnDemand) Allow the computer to ignore NetBIOS name release requests except from WINS servers" to "Enabled".

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