Outline Service 1.3.3 Unquoted Service Path

`# Exploit Title: Outline Service 1.3.3 - 'Outline Service ' Unquoted Service Path  
# Discovery by: Minh Tuan - SunCSR  
# Discovery Date: 2020-05-03  
# Vendor Homepage: https://getoutline.org/vi/home  
# Software Link : https://raw.githubusercontent.com/Jigsaw-Code/outline-releases/master/client/stable/Outline-Client.exe  
# Tested Version: 1.3.3  
# Vulnerability Type: Unquoted Service Path  
# Tested on OS: Windows 10 Pro x64 10.0.18363 N/A Build 18363  
  
# Step to discover Unquoted Service Path:   
  
C:\Users\minht>wmic service get name,pathname,displayname,startmode | findstr /i auto | findstr /i /v "C:\Windows\\" | findstr /i /v """  
OutlineService OutlineService C:\Program Files (x86)\Outline\OutlineService.exe  
  
C:\Users\minht>sc qc OutlineService  
[SC] QueryServiceConfig SUCCESS  
  
SERVICE_NAME: OutlineService  
TYPE : 10 WIN32_OWN_PROCESS  
START_TYPE : 2 AUTO_START  
ERROR_CONTROL : 1 NORMAL  
BINARY_PATH_NAME : C:\Program Files (x86)\Outline\OutlineService.exe  
LOAD_ORDER_GROUP :  
TAG : 0  
DISPLAY_NAME : OutlineService  
DEPENDENCIES :  
SERVICE_START_NAME : LocalSystem  
  
# Exploit:  
# A successful attempt would require the local user to be able to insert their code in the system root path   
# undetected by the OS or other security applications where it could potentially be executed during   
# application startup or reboot. If successful, the local user's code would execute with the elevated   
# privileges of the application.  
`