MSDT(Follina) Vulnerability-Hotfix
Step:1
- Download the Follina folder containing msdt.ps1 file
- Save it in location: C:\Users\your user name\Desktop\Follina
Eg: C:\Users\merlin.george\Desktop\Follina
Step:2
- Click on File> Open Windows PowerShell as administrator
- Click Yes in the windows prompt and allow the app to make changes.
Step:3
Enter these commands:
Set-ExecutionPolicy remoteSigned
Enter y to continue
If you find any error/warning, enter the below command and continue
Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass
Step:4
Enter these commands
.\msdt.ps1
Enter y to continue
As a result, a backup file named “msdturlprotocol.reg” will also be automatically created in the your current location (C:\Users\...\Follina\) as shown in the below screenshot.
Note: This backup file(msdturlprotocol.reg) is required to undo the hotfix once Microsoft releases a patch. So, please keep this file.
Step:5
To verify the change, enter the command .\msdt.ps1 again and you will receive an output as in the below screenshot confirming the system is now free from the Follina vulnerability.
Step:6
Enter these commands to revert the execution policy to restricted mode.
Set-ExecutionPolicy restricted
Enter y to continue
Congratulations! You have successfully completed the change.