Microsoft Windows Server 2016
Anonymous access to Named Pipes and Shares must be restricted
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.
Check
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: RestrictNullSessAccessValue Type: REG_DWORDValue: 0x00000001 (1)
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".