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The service principal name (SPN) target name validation level must be configured to Accept if provided by client.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-63735 | WN10-SO-000135 | SV-78225r1_rule | Medium |
| Description |
|---|
| If a service principle name (SPN) is provided by the client, it is validated against the server's list of SPNs, aiding in the prevention of spoofing. |
| STIG | Date |
|---|---|
| Windows 10 Security Technical Implementation Guide | 2015-11-30 |
Details
| Check Text ( C-64485r1_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: SmbServerNameHardeningLevel Value Type: REG_DWORD Value: 1 |
| Fix Text (F-69663r1_fix) |
|---|
| Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Microsoft network server: Server SPN target name validation level" to "Accept if provided by client". |