Check: WN19-CC-000370
Microsoft Windows Server 2019 STIG:
WN19-CC-000370
(in versions v2 r9 through v1 r1)
Title
Windows Server 2019 Remote Desktop Services must require secure Remote Procedure Call (RPC) communications. (Cat II impact)
Discussion
Allowing unsecure RPC communication exposes the system to man-in-the-middle attacks and data disclosure attacks. A man-in-the-middle attack occurs when an intruder captures packets between a client and server and modifies them before allowing the packets to be exchanged. Usually the attacker will modify the information in the packets in an attempt to cause either the client or server to reveal sensitive information. Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000250-GPOS-00093
Check Content
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: \SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\ Value Name: fEncryptRPCTraffic Type: REG_DWORD Value: 0x00000001 (1)
Fix Text
Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Remote Desktop Services >> Remote Desktop Session Host >> Security >> "Require secure RPC communication" to "Enabled".
Additional Identifiers
Rule ID: SV-205636r877398_rule
Vulnerability ID: V-205636
Group Title: SRG-OS-000033-GPOS-00014
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000068 |
The information system implements cryptographic mechanisms to protect the confidentiality of remote access sessions. |
| CCI-001453 |
The information system implements cryptographic mechanisms to protect the integrity of remote access sessions. |
Controls
| Number | Title |
|---|---|
| AC-17 (2) |
Protection Of Confidentiality / Integrity Using Encryption |