cWifi Hotspot Wireless CP Code Execution

2022-01-0500:00:00
Vulnerability Laboratory, vulnerability-lab.com
packetstormsecurity.com
191
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`Document Title:  
===============  
cWifi Hotspot Wireless CP - Code Execution Vulnerability  
  
  
References (Source):  
====================  
https://www.vulnerability-lab.com/get_content.php?id=2310  
  
  
Release Date:  
=============  
2021-12-15  
  
  
Vulnerability Laboratory ID (VL-ID):  
====================================  
2310  
  
  
Common Vulnerability Scoring System:  
====================================  
8.2  
  
  
Vulnerability Class:  
====================  
Code Execution  
  
  
Current Estimated Price:  
========================  
2.000€ - 3.000€  
  
  
Abstract Advisory Information:  
==============================  
The vulnerability laboratory core research team discovered code execution vulnerability in the cWifi Hotspot Wireless Captive Portal.  
  
  
Affected Product(s):  
====================  
Product: cWifi Hotspot Wireless Captive Portal - (PHP) (Web-Application)  
  
  
Vulnerability Disclosure Timeline:  
==================================  
2021-12-15: Public Disclosure (Vulnerability Laboratory)  
  
  
Discovery Status:  
=================  
Published  
  
  
Exploitation Technique:  
=======================  
Remote  
  
  
Severity Level:  
===============  
High  
  
  
Authentication Type:  
====================  
Restricted Authentication (Guest Privileges)  
  
  
User Interaction:  
=================  
No User Interaction  
  
  
Disclosure Type:  
================  
Independent Security Research  
  
  
Technical Details & Description:  
================================  
A code execution vulnerability has been discovered in the official cWifi Hotspot wireless captive portal web-application.  
The vulnerability is located in the login status post method request for the spot-cwifi. Remote attackers are able to inject own malicious ip and  
mac adress credentials in the post method data request. that results in several different typ of vulnerabilities in connection to the phpsessionid.  
Attackers are able to provoke client-side script code execution via mac or ip parameter in the status post method request. Thus allows the attacker  
to gain access to the victims wifi connection and session credentials to access. The issue can be process by a full remote attacker after connecting  
as guest or member to the wifi. The parameter in the post method request are no sanitized correctly and results in a client-side execution.  
  
Request Method(s):  
[+] POST  
  
Vulnerable Module(s):  
[+] /v2/  
[+] /logout  
  
Vulnerable File(s):  
[+] status.php  
  
Vulnerable Parameter(s):  
[+] ip  
[+] mac  
[+] adress  
  
  
Proof of Concept (PoC):  
=======================  
The critical code execution vulnerability can be exploited by remote attackers with guest access or by authenticated user accounts.  
For security demonstration or to reproduce the web vulnerability follow the provided information and steps below to continue.  
  
  
Vulnerable Source: status.php (v2/status.php -http://spot.cwifi.de/status)  
</head>  
<body>  
<div class="container-fluid">  
<br><br>   
<div class="row">  
<div class="col-md-4"></div>  
<div class="col-md-4">  
<form data-ajax="false" action='/v2/status.php?PHPSESSID=06u1m6qlhcp4tbuuapnq8du5c7' method="post">  
<p><span class="zwischenh1gelb gelb bold">MAC-Adresse: <[MALICIOUS INJECTED CODE EXECUTION!]></span></span>  
</span>  
<span class="bold">IP Adresse:</span><[MALICIOUS INJECTED CODE PAYLOAD EXECUTION!]></p>  
<p><span class="bold">Bytes up/down:</span>7.2 MiB/ 221.6 MiB</p>  
<p><span class="bold">Session time:</span>7m56s</p>  
<p><br>  
<button name="ABMELDEN" type="submit" class="btn btn-primary btn-lg btn-block">abmelden</button>  
<button name="DELETE" type="submit" class="btn btn-danger btn-lg btn-block">abmelden und Daten löschen</button>  
</p>  
</form>  
<div class="col-md-4"></div>  
</div> </div>   
</body>  
</html>  
-- logout status  
<td valign="middle" align="center">  
<b>you have just logged out</b> <br><br>  
<table class="tabula" border="1">  
<tbody><tr><td align="right">user name</td><td><[MALICIOUS INJECTED CODE PAYLOAD EXECUTION!]></td></tr>  
<tr><td align="right">IP address</td><td><[MALICIOUS INJECTED CODE PAYLOAD EXECUTION!]></td></tr>  
<tr><td align="right">MAC address</td><td><[MALICIOUS INJECTED CODE PAYLOAD EXECUTION!]></td></tr>  
<tr><td align="right">session time</td><td>4m12s</td></tr>  
<tr><td align="right">time left</td><td>23h55m48s</td></tr>  
<tr><td align="right">bytes up/down:</td><td>49.1 KiB / 169.2 KiB</td></tr>  
</tbody></table>  
<br>  
<form action="http://spot.cwifi.de/login" name="login" onsubmit="return openLogin()">  
<input type="submit" value="log in">  
</form>  
</td>  
  
  
--- PoC Session Logs (POST) ---  
POST /v2/status.php HTTP/1.1  
Host: hotspot.cwifi.de  
Content-Length: 1129  
Cache-Control: max-age=0  
Sec-Ch-Ua: "Chromium";v="93", " Not;A Brand";v="99"  
Sec-Ch-Ua-Mobile: ?0  
Sec-Ch-Ua-Platform: "Windows"  
Upgrade-Insecure-Requests: 1  
Origin:http://spot.cwifi.de  
Content-Type: application/x-www-form-urlencoded  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9  
Sec-Fetch-Site: cross-site  
Sec-Fetch-Mode: navigate  
Sec-Fetch-Dest: document  
Referer:http://spot.cwifi.de/  
Accept-Encoding: gzip, deflate  
Accept-Language: de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7  
Connection: close  
-  
hostname=spot.cwifi.de&identity=Client2822&login-by=http-pap&plain-passwd=yes&server-address=<[MALICIOUS INJECTED CODE!]>%3A80&ssl-login=no  
&server-name=Client2822_HotSpot&link-login=http%3A%2F%2Fspot.cwifi.de%2Flogin&link-login-only=http%3A%2F%2Fspot.cwifi.de%2Flogin  
&link-logout=http%3A%2F%2Fspot.cwifi.de%2Flogout&link-status=http%3A%2F%2Fspot.cwifi.de%2Fstatus&link-orig=  
&domain=&interface-name=2_HotSpotA&ip=<[MALICIOUS INJECTED CODE!]>&logged-in=yes&mac=<[MALICIOUS INJECTED CODE!]>&trial=no&username=90%3ACC%3ADF%3A96%3AF6%3A59  
&host-ip=<[MALICIOUS INJECTED CODE!]>&idle-timeout=5h&idle-timeout-secs=18000&limit-bytes-in=&limit-bytes-out=&refresh-timeout=1m&refresh-timeout-secs=60  
&session-timeout=23h52m4s&session-timeout-secs=85924&session-time-left=23h52m4s&session-time-left-secs=85924&uptime=7m56s&uptime-secs=476  
&bytes-in=7591511&bytes-in-nice=7.2+MiB&bytes-out=232391459&bytes-out-nice=221.6+MiB&packets-in=154484&packets-out=172963&remain-bytes-in=  
&remain-bytes-out=&session-id=&var=&error=&error-orig=&chap-id=%24%28chap-id%29&chap-challenge=%24%28chap-challenge%29&popup=%24%28popup%29  
&advert-pending=no&http-status=%24%28http-status%29&http-header=%24%28http-header%29  
-  
HTTP/1.1 200 OK  
Server: Apache/2.4.18 (Ubuntu)  
Set-Cookie: PHPSESSID=06u1m6qlhcp4tbuuapnq8du5c7; path=/  
Cache-Control: no-store, no-cache, must-revalidate  
Vary: Accept-Encoding  
Content-Length: 2137  
Connection: close  
Content-Type: text/html; charset=UTF-8  
-- via Login  
https://hotspot.cwifi.de/v2/login.php  
Host: hotspot.cwifi.de  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8  
Accept-Language: de,en-US;q=0.7,en;q=0.3  
Accept-Encoding: gzip, deflate, br  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 1078  
Origin:http://spot.cwifi.de  
Connection: keep-alive  
Referer:http://spot.cwifi.de/  
Cookie: PHPSESSID=tvpvp06jktbs8hvgm8efh1eh33  
Upgrade-Insecure-Requests: 1  
Sec-Fetch-Dest: document  
Sec-Fetch-Mode: navigate  
Sec-Fetch-Site: cross-site  
phone=&hostname=spot.cwifi.de&identity=Client2822&login-by=&plain-passwd=yes&server-address=<[MALICIOUS INJECTED CODE!]>:80&ssl-login=no&server-name=Client2822_HotSpot  
&link-login=http://spot.cwifi.de/login&link-login-only=http://spot.cwifi.de/login&link-logout=http://spot.cwifi.de/logout&link-status=http://spot.cwifi.de/status  
&link-orig=&domain=&interface-name=2_HotSpotA&ip=<[MALICIOUS INJECTED CODE!]>&logged-in=no&mac=<[MALICIOUS INJECTED CODE!]>&trial=no&username=  
&host-ip=<[MALICIOUS INJECTED CODE!]>&idle-timeout=&idle-timeout-secs=0  
&limit-bytes-in=&limit-bytes-out=&refresh-timeout=&refresh-timeout-secs=0&session-timeout=&session-timeout-secs=0&session-time-left=&session-time-left-secs=0  
&uptime=0s&uptime-secs=0&bytes-in=0&bytes-in-nice=0 B&bytes-out=0&bytes-out-nice=0 B&packets-in=0&packets-out=0&remain-bytes-in=&remain-bytes-out=&session-id=  
&var=&error=&error-orig=&chap-id=244&chap-challenge=2765623021030016220234114113331227527435520051  
&popup=true&advert-pending=no&http-status=$(http-status)&http-header=$(http-header)  
-  
POST: HTTP/1.1 200 OK  
Server: Apache/2.4.18 (Ubuntu)  
Cache-Control: no-store, no-cache, must-revalidate  
Vary: Accept-Encoding  
Content-Encoding: gzip  
Content-Length: 334  
Keep-Alive: timeout=5, max=100  
Connection: Keep-Alive  
Content-Type: text/html; charset=UTF-8  
  
  
Security Risk:  
==============  
The security risk of the code execution web vulnerability that allows to attack by multiple vectors to compromise the wifi is estimated as high.  
  
  
Credits & Authors:  
==================  
Vulnerability-Lab [[email protected]] -https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab  
  
  
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=========================  
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