Wowza Streaming Engine 4.5.0 Local Privilege Escalation

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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  
`