STIG ID: WN11-SO-000120 | SRG: SRG-OS-000423-GPOS-00187 | Severity: medium | CCI: | Vulnerability Id: V-253451
The server message block (SMB) protocol provides the basis for many network operations. Digitally signed SMB packets aid in preventing man-in-the-middle attacks. If this policy is enabled, the SMB server will only communicate with an SMB client that performs SMB packet signing.
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Microsoft network server: Digitally sign communications (always)" to "Enabled".
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: RequireSecuritySignature
Value Type: REG_DWORD
Value: 1