Disable weak RDP Vulnerabilities remotely

Posted by robd on January 28, 2021
powershell, Vulnerabilities

Hello,

Here’s another handy fix for resolving RDP vulnerabilities remotely.

The script is a bit rubbish as I’ve not used CredSSP (I was in a rush) so you’ll need to run PowerShell as a admin and you’ll need a CSV with the servers in:

csv format:

Server

server1

server2

server3

Import-Csv "c:\temp\RDP_Vun.csv"| ForEach-Object {

write-host ""
write-host "===================================="
write-host "Computer: $_.server"
write-host "===================================="

write-host "-----------------------------------"
write-host "Fix RDP Vunrability"
write-host "-----------------------------------"

# Remote Desktop Services: Enable NLA Requirement
(Get-WmiObject -Computer $_.server -class "Win32_TSGeneralSetting" -Namespace root\cimv2\terminalservices -Filter "TerminalName='RDP-tcp'").UserAuthenticationRequired  
(Get-WmiObject -Computer $_.server -class "Win32_TSGeneralSetting" -Namespace root\cimv2\terminalservices -Filter "TerminalName='RDP-tcp'").SetUserAuthenticationRequired(1) 

# Remote Desktop Services: Require 'High' level of encryption
(Get-WmiObject -Computer $_.server -class "Win32_TSGeneralSetting" -Namespace root\cimv2\terminalservices -Filter "TerminalName='RDP-tcp'").SetEncryptionLevel(3) 

# Remote Desktop Services: Set Security Layer to SSL
(Get-WmiObject -Computer $_.server -class "Win32_TSGeneralSetting" -Namespace root\cimv2\terminalservices -Filter "TerminalName='RDP-tcp'").SetSecurityLayer(2)


} 

 

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