Finding ID | Version | Rule ID | IA Controls | Severity |
---|---|---|---|---|
V-21950 | 3.150 | SV-25273r2_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 7 Security Technical Implementation Guide | 2018-02-12 |
Check Text ( C-60807r2_chk ) |
---|
Analyze the system using the Security Configuration and Analysis snap-in. Expand the Security Configuration and Analysis tree view. Navigate to Local Policies >> Security Options. If the value for "Microsoft network server: Server SPN target name validation level" is not set to "Accept if provided by client", this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\ Value Name: SmbServerNameHardeningLevel Type: REG_DWORD Value: 1 |
Fix Text (F-65539r2_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". |