BlueStacks 2.5.55 – Unquoted Service Path Privilege Escalation

• Exploit Database
• 27 阅读

• 作者： Th3GundY
  日期： 2016-10-07
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/40477/

• # Exploit Title: BlueStacks 2.5.55 Unquoted Service Path Privilege Escalation
  # Date: 24/09/2016
  # Author: Yunus YILDIRIM (@Th3GundY)
  # Team: CT-Zer0 (@CRYPTTECH)
  # Website: http://yildirimyunus.com
  # Contact: yunusyildirim@protonmail.com
  # Category: local
  # Vendor Homepage: http://www.bluestacks.com/
  # Version: Software Version <= 2.5.55
  # Tested on: Windows 7-10 x86/x64
  
  1. Description
  
  BlueStacks Log Rotator Service (BstHdLogRotatorSvc) 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.
  
  
  2. Proof of Concept
  
  C:\>sc qc BstHdLogRotatorSvc
  [SC] QueryServiceConfig SUCCESS
  SERVICE_NAME: BstHdLogRotatorSvc
  TYPE : 10WIN32_OWN_PROCESS 
  START_TYPE : 3 DEMAND_START
  ERROR_CONTROL: 1 NORMAL
  BINARY_PATH_NAME : C:\Program Files (x86)\Bluestacks\HD-LogRotatorService.exe
  LOAD_ORDER_GROUP : 
  TAG: 0
  DISPLAY_NAME : BlueStacks Log Rotator Service
  DEPENDENCIES : 
  SERVICE_START_NAME : LocalSystem		
  		
  		
  3. Exploit:
   
  A successful attempt would require the local attacker must insert an executable file
  in the path of the service.
  Upon service restart or system reboot, the malicious code will be run with elevated privileges.
  
  
  Additional notes :
  
  Fixed in version v2.5.61
  
  Vulnerability Disclosure Timeline:
  =========================
  24/09/2016 - Contact With Vendor
  28/09/2016 - Vendor Response
  04/10/2016 - Release Fixed Version