Microsoft Windows Server 2022

Windows Server 2022 setting Microsoft network client: Digitally sign communications (always) must be configured to Enabled

STIG ID: WN22-SO-000160 | SRG: SRG-OS-000423-GPOS-00187 | Severity: Medium | CCI: CCI-002418,CCI-002421 | Vulnerability ID: V-254460

Description

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 client will only communicate with an SMB server that performs SMB packet signing.Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188

Check

C-57945r849194_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\LanmanWorkstation\Parameters\Value Name: RequireSecuritySignatureValue Type: REG_DWORDValue: 0x00000001 (1)

Fix

F-57896r849195_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> Microsoft network client: Digitally sign communications (always) to "Enabled".