Ubisoft Uplay 4.6 – Insecure File Permissions Privilege Escalation

• Exploit Database
• 9 阅读

• 作者： LiquidWorm
  日期： 2014-07-03
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/33961/

• 
  Ubisoft Uplay 4.6 Insecure File Permissions Local Privilege Escalation
  
  
  Vendor: Ubisoft Entertainment S.A.
  Product web page: http://www.ubi.com
  Affected version: 4.6.3208 (PC)
  4.5.2.3010 (PC)
  
  
  Summary: Uplay is a digital distribution, digital rights management,
  multiplayer and communications service created by Ubisoft to provide
  an experience similar to the achievements/trophies offered by various
  other game companies.
  
   - Uplay PC is a desktop client which replaces individual game launchers
   previously used for Ubisoft games. With Uplay PC, you have all your Uplay
   enabled games and Uplay services in the same place and you get access to
   a whole new set of features for your PC games.
  
  Desc: Uplay for PC suffers from an elevation of privileges vulnerability
  which can be used by a simple user that can change the executable file
  with a binary of choice. The vulnerability exist due to the improper
  permissions, with the 'F' flag (Full) for 'Everyone' group, making the
  entire directory 'Ubisoft Game Launcher' and its files and sub-dirs
  world-writable.
  
  Tested on: Microsoft Windows 7 Professional SP1 (EN)
   Microsoft Windows 7 Ultimate SP1 (EN)
  
  
  Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
  @zeroscience
  
  
  Advisory ID: ZSL-2014-5191
  Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2014-5191.php
  
  Vendor: http://forums.ubi.com/forumdisplay.php/513-Uplay
  
  
  30.05.2014
  
  --
  
  
  =======================================================================
  
  C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher>icacls *.exe |findstr Everyone
  UbisoftGameLauncher.exe Everyone:(I)(F)
  UbisoftGameLauncher64.exe Everyone:(I)(F)
  Uninstall.exe Everyone:(I)(F)
  Uplay.exe Everyone:(I)(F)
  UplayCrashReporter.exe Everyone:(I)(F)
  UplayService.exe Everyone:(I)(F)
  
  C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher>
  
  
  =======================================================================
  
  C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher>icacls Uplay.exe
  Uplay.exe Everyone:(I)(F)
  NT AUTHORITY\SYSTEM:(I)(F)
  BUILTIN\Administrators:(I)(F)
  BUILTIN\Users:(I)(RX)
  
  Successfully processed 1 files; Failed processing 0 files
  
  C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher>
  
  =======================================================================
  
  C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher>icacls *.exe |findstr (F)
  UbisoftGameLauncher.exe Everyone:(I)(F)
  NT AUTHORITY\SYSTEM:(I)(F)
  BUILTIN\Administrators:(I)(F)
  UbisoftGameLauncher64.exe Everyone:(I)(F)
  NT AUTHORITY\SYSTEM:(I)(F)
  BUILTIN\Administrators:(I)(F)
  Uninstall.exe Everyone:(I)(F)
  NT AUTHORITY\SYSTEM:(I)(F)
  BUILTIN\Administrators:(I)(F)
  Uplay.exe Everyone:(I)(F)
  NT AUTHORITY\SYSTEM:(I)(F)
  BUILTIN\Administrators:(I)(F)
  UplayCrashReporter.exe Everyone:(I)(F)
   NT AUTHORITY\SYSTEM:(I)(F)
   BUILTIN\Administrators:(I)(F)
  UplayService.exe Everyone:(I)(F)
   NT AUTHORITY\SYSTEM:(I)(F)
   BUILTIN\Administrators:(I)(F)
  
  C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher>
  
  =======================================================================
  
  C:\Program Files (x86)\Ubisoft>icacls "Ubisoft Game Launcher"
  Ubisoft Game Launcher Everyone:(OI)(CI)(F)
  NT SERVICE\TrustedInstaller:(I)(F)
  NT SERVICE\TrustedInstaller:(I)(CI)(IO)(F)
  NT AUTHORITY\SYSTEM:(I)(F)
  NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F)
  BUILTIN\Administrators:(I)(F)
  BUILTIN\Administrators:(I)(OI)(CI)(IO)(F)
  BUILTIN\Users:(I)(RX)
  BUILTIN\Users:(I)(OI)(CI)(IO)(GR,GE)
  CREATOR OWNER:(I)(OI)(CI)(IO)(F)
  
  Successfully processed 1 files; Failed processing 0 files
  
  C:\Program Files (x86)\Ubisoft>
  
  =======================================================================
  =======================================================================
  
  Changed permissions (vendor fix):
  ---------------------------------
  
  C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher>cacls Uplay.exe
  C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\Uplay.exe BUILTIN\Users:(ID)(special access:)
   DELETE
   READ_CONTROL
   WRITE_DAC
   WRITE_OWNER
   STANDARD_RIGHTS_REQUIRED
   FILE_READ_DATA
   FILE_WRITE_DATA
   FILE_APPEND_DATA
   FILE_READ_EA
   FILE_WRITE_EA
   FILE_EXECUTE
  
   NT AUTHORITY\SYSTEM:(ID)F
   BUILTIN\Administrators:(ID)F
   BUILTIN\Users:(ID)R
   labpc\user4dmin:(ID)F
  
  
  C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher>
  
  =======================================================================