Finding ID | Version | Rule ID | IA Controls | Severity |
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V-3666 | WN08-SO-000070 | SV-48120r1_rule | ECCT-1 ECCT-2 | Medium |
Description |
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Microsoft has implemented a variety of security support providers for use with RPC sessions. All of the options must be enabled to ensure the maximum security level. |
STIG | Date |
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Windows 8 Security Technical Implementation Guide | 2014-01-07 |
Check Text ( C-44846r1_chk ) |
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Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.) Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for "Network security: Minimum session security for NTLM SSP based (including secure RPC) servers" is not set to "Require NTLMv2 session security" and "Require 128-bit encryption", this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Control\Lsa\MSV1_0\ Value Name: NTLMMinServerSec Value Type: REG_DWORD Value: 0x20080000 (537395200) "Require NTLMv2 session security" will prevent authentication if "Network security: LAN Manager Authentication level" is set to permit NTLM or LM authentication. |
Fix Text (F-41257r1_fix) |
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Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Network security: Minimum session security for NTLM SSP based (including secure RPC) servers" to "Require NTLMv2 session security" and "Require 128-bit encryption" (all options selected). |