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The Windows SMB server must perform SMB packet signing when possible.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-226298 | WN12-SO-000033 | SV-226298r852142_rule | Medium |
| 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 server will negotiate SMB packet signing as requested by the client. |
| STIG | Date |
|---|---|
| Microsoft Windows Server 2012/2012 R2 Domain Controller Security Technical Implementation Guide | 2023-02-27 |
Details
| Check Text ( C-28000r476738_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: EnableSecuritySignature Value Type: REG_DWORD Value: 1 |
| Fix Text (F-27988r476739_fix) |
|---|
| Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Microsoft network server: Digitally sign communications (if client agrees)" to "Enabled". |