Windows Server 2019 must restrict anonymous access to Named Pipes and Shares.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-205725	WN19-SO-000250	SV-205725r569188_rule		High

Description
Allowing anonymous access to named pipes or shares provides the potential for unauthorized system access. This setting restricts access to those defined in "Network access: Named Pipes that can be accessed anonymously" and "Network access: Shares that can be accessed anonymously", both of which must be blank under other requirements.

STIG	Date
Microsoft Windows Server 2019 Security Technical Implementation Guide	2022-03-01

Details

Check Text ( C-5990r355093_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\LanManServer\Parameters\ Value Name: RestrictNullSessAccess Value Type: REG_DWORD Value: 0x00000001 (1)

Fix Text (F-5990r355094_fix)
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Restrict anonymous access to Named Pipes and Shares" to "Enabled".