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? Electronic Arts Origin Client 9.5.5 Multiple Privilege Escalation Vulnerabilities Vendor: Electronic Arts Inc. Product web page: https://www.origin.com Affected version: 9.5.5.2850 (353317) 9.5.3.636 (350385) 9.5.2.2829 (348065) Summary: Origin (formerly EA Download Manager (EADM)) is digital distribution software from Electronic Arts that allows users to purchase games on the internet for PC and mobile platforms, and download them with the Origin client (formerly EA Download Manager, EA Downloader and EA Link). Desc#1: The application is vulnerable to 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 the 'Everyone' and 'Users' group, for the 'OriginClientService.exe' binary file, and for all the files in the 'Origin' directory. The service is installed by default to start on system boot with LocalSystem privileges. Attackers can replace the binary with their rootkit, and on reboot they get SYSTEM privileges. Desc#2: Origin client service also suffers from an unquoted search path issue impacting the 'Origin Client Service' service for Windows deployed as part of the Origin Thin Setup bundle. This could potentially allow an authorized but non-privileged local user to execute arbitrary code with elevated privileges on the system. 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. Tested on: Microsoft Windows 7 Professional SP1 (EN) Microsoft Windows 7 Ultimate SP1 (EN) Vulnerabilities discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2015-5231 Advisory URL: [url]http://www.zeroscience.mk/en/vulnerabilities/ZSL-2015-5231.php[/url] 14.12.2014 ************************************************************************** C:\>sc qc "Origin Client Service" [SC] QueryServiceConfig SUCCESS SERVICE_NAME: Origin Client Service TYPE : 10 WIN32_OWN_PROCESS START_TYPE : 3 DEMAND_START ERROR_CONTROL : 1 NORMAL BINARY_PATH_NAME : C:\Program Files (x86)\Origin\OriginClientService.exe <-----< Unquoted path LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : Origin Client Service DEPENDENCIES : SERVICE_START_NAME : LocalSystem C:\>cacls "C:\Program Files (x86)\Origin\OriginClientService.exe" c:\Program Files (x86)\Origin\OriginClientService.exe Everyone:(ID)F <-----< Full control BUILTIN\Users:(ID)F <-----< Full control NT AUTHORITY\SYSTEM:(ID)F BUILTIN\Administrators:(ID)F C:\> ************************************************************************** ************************************************************************** C:\>cscript XCACLS.vbs "C:\Program Files (x86)\Origin\*.exe" Microsoft (R) Windows Script Host Version 5.8 Copyright (C) Microsoft Corporation. All rights reserved. Starting XCACLS.VBS (Version: 5.2) Script at 15.12.2014 19:46:41 Startup directory: "C:\" Arguments Used: Filename = "C:\Program Files (x86)\Origin\*.exe" ************************************************************************** File: C:\Program Files (x86)\Origin\EAProxyInstaller.exe Permissions: Type Username Permissions Inheritance Allowed \Everyone Full Control This Folder Only Allowed BUILTIN\Users Full Control This Folder Only Allowed NT AUTHORITY\SYSTEM Full Control This Folder Only Allowed BUILTIN\Administrators Full Control This Folder Only No Auditing set Owner: BUILTIN\Administrators ************************************************************************** ************************************************************************** File: C:\Program Files (x86)\Origin\igoproxy64.exe Permissions: Type Username Permissions Inheritance Allowed \Everyone Full Control This Folder Only Allowed BUILTIN\Users Full Control This Folder Only Allowed NT AUTHORITY\SYSTEM Full Control This Folder Only Allowed BUILTIN\Administrators Full Control This Folder Only No Auditing set Owner: BUILTIN\Administrators ************************************************************************** ************************************************************************** File: C:\Program Files (x86)\Origin\Origin.exe Permissions: Type Username Permissions Inheritance Allowed \Everyone Full Control This Folder Only Allowed BUILTIN\Users Full Control This Folder Only Allowed NT AUTHORITY\SYSTEM Full Control This Folder Only Allowed BUILTIN\Administrators Full Control This Folder Only No Auditing set Owner: BUILTIN\Administrators ************************************************************************** ************************************************************************** File: C:\Program Files (x86)\Origin\OriginClientService.exe Permissions: Type Username Permissions Inheritance Allowed \Everyone Full Control This Folder Only Allowed BUILTIN\Users Full Control This Folder Only Allowed NT AUTHORITY\SYSTEM Full Control This Folder Only Allowed BUILTIN\Administrators Full Control This Folder Only No Auditing set Owner: BUILTIN\Administrators ************************************************************************** ************************************************************************** File: C:\Program Files (x86)\Origin\OriginCrashReporter.exe Permissions: Type Username Permissions Inheritance Allowed \Everyone Full Control This Folder Only Allowed BUILTIN\Users Full Control This Folder Only Allowed NT AUTHORITY\SYSTEM Full Control This Folder Only Allowed BUILTIN\Administrators Full Control This Folder Only No Auditing set Owner: BUILTIN\Administrators ************************************************************************** ************************************************************************** File: C:\Program Files (x86)\Origin\OriginER.exe Permissions: Type Username Permissions Inheritance Allowed \Everyone Full Control This Folder Only Allowed BUILTIN\Users Full Control This Folder Only Allowed NT AUTHORITY\SYSTEM Full Control This Folder Only Allowed BUILTIN\Administrators Full Control This Folder Only No Auditing set Owner: BUILTIN\Administrators ************************************************************************** ************************************************************************** File: C:\Program Files (x86)\Origin\OriginUninstall.exe Permissions: Type Username Permissions Inheritance Allowed \Everyone Full Control This Folder Only Allowed BUILTIN\Users Full Control This Folder Only Allowed NT AUTHORITY\SYSTEM Full Control This Folder Only Allowed BUILTIN\Administrators Full Control This Folder Only No Auditing set Owner: BUILTIN\Administrators ************************************************************************** Operation Complete Elapsed Time: 0,1796875 seconds. Ending Script at 15.12.2014 19:46:41 C:\> ************************************************************************** -- ************************************************************************** Changed permissions and service binary path name (vendor fix): -------------------------------------------------------------- C:\>sc qc "Origin Client Service" [SC] QueryServiceConfig SUCCESS SERVICE_NAME: Origin Client Service TYPE : 10 WIN32_OWN_PROCESS START_TYPE : 3 DEMAND_START ERROR_CONTROL : 1 NORMAL BINARY_PATH_NAME : "C:\Program Files (x86)\Origin\OriginClientService.exe" <-----< Quoted path LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : Origin Client Service DEPENDENCIES : SERVICE_START_NAME : LocalSystem C:\>icacls "C:\Program Files (x86)\Origin\OriginClientService.exe" C:\Program Files (x86)\Origin\OriginClientService.exe NT AUTHORITY\SYSTEM:(I)(F) BUILTIN\Administrators:(I)(F) BUILTIN\Users:(I)(RX) <-----< Read and execute Successfully processed 1 files; Failed processing 0 files C:\> ************************************************************************** Source