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CVE-2023-4220 PoC — Chamilo LMS Unauthenticated Big Upload File Remote Code Execution

Source
https://github.com/Pr1or95/CVE-2023-4220-exploit
Associated Vulnerability
Title:Chamilo LMS Unauthenticated Big Upload File Remote Code Execution (CVE-2023-4220)
Description:Unrestricted file upload in big file upload functionality in `/main/inc/lib/javascript/bigupload/inc/bigUpload.php` in Chamilo LMS <= v1.11.24 allows unauthenticated attackers to perform stored cross-site scripting attacks and obtain remote code execution via uploading of web shell.
Description
Carga de archivos sin restricciones en la funcionalidad de carga de archivos grandes en `/main/inc/lib/javascript/bigupload/inc/bigUpload.php` en Chamilo LMS en versiones <= 1.11.24 permite a atacantes no autenticados realizar ataques de Cross Site Scripting almacenados y obtener código remoto ejecución mediante la carga de web shell.
Readme
# CVE-2023-4220-exploit

Carga de archivos sin restricciones en la funcionalidad de carga de archivos grandes en `/main/inc/lib/javascript/bigupload/inc/bigUpload.php` en Chamilo LMS en versiones <= 1.11.24 permite a atacantes no autenticados realizar ataques de Cross Site Scripting almacenados y obtener código remoto ejecución mediante la carga de web shell.

# PoC
```
bash CVE.2023-4220.sh -f (webshell) -u (URL) -l (puerto)
```
![image](https://github.com/user-attachments/assets/12dad94a-26cd-4b88-9364-9901880d1311)

El archivo subido deberíamos poder verlo en la siguiente ruta: /main/inc/lib/javascript/bigupload/files.

![image](https://github.com/user-attachments/assets/29243a77-552d-4a05-9142-0c97bc36e146)

# Webshell
En este caso, hemos creado una webshell con la herramienta **Hack-Tools**.

![image](https://github.com/user-attachments/assets/000d75e5-0c4d-43e5-b56d-e2226f0d09d7)
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