> For the complete documentation index, see [llms.txt](https://beafn28.gitbook.io/beafn28/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://beafn28.gitbook.io/beafn28/web-security/bscp-cheat-sheet/web-sockets.md).

# Web Sockets

## Lab 1: Manipulación de mensajes WebSocket

1. Interceptar el mensaje y modificarlo manualmente antes de que llegue al servidor, conseguimos insertar una carga que, al ser procesada por el navegador del agente de soporte, genera una ejecución no deseada.
2. ```
   <img src="abc" onerror="alert(1)">
   ```
3. Enviamos.

## Lab 2: Secuestro de WebSocket entre sitios

1. Interceptamos los mensajes.
2. Mandamos este script al exploit server.\
   ![](/files/lZVwCii4ifWZC1OKGKJK)
3. Nos damos cuenta que se nos proporcionan unas cadenas base64 en la que pillamos una conversación.
4. Decodificamos.

## Lab 3: Manipulación del handshake de WebSocket

1. Creamos esta regla para que no nos bloqueen por IP.\
   ![](/files/bdSvSje3gHosqE6BIn8p)
2. Mandamos el siguiente payload.\
   ![](/files/R24RxdMJqfUc7o4ptw0I)


---

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