Microsoft Windows Server 2019

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

STIG ID: WN19-SO-000250 | SRG: SRG-OS-000138-GPOS-00069 | Severity: High | CCI: CCI-001090 | Vulnerability ID: V-205725

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

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: RestrictNullSessAccessValue Type: REG_DWORDValue: 0x00000001 (1)

Fix

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".