> 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/cache-poisoning/internal-cache-poisoning.md).
# 内部缓存投毒
内部缓存投毒，PortSwigger Web Security Academy 实验笔记，包括利用流程、载荷测试、Burp Suite 验证以及修复上下文。
### 内部缓存投毒
这个实验室存在 Web 缓存投毒漏洞，并使用了多个缓存层。/ 有一名用户会定期使用 Chrome 访问该网站的主页。
目标是投毒 **内部缓存** 从而使主页运行 `alert(document.cookie)` 在受害者的浏览器中。
**初始分析**
我们拦截到根路径（`/`）并使用 **Param Miner**
**行为观察**
当我们向请求中添加以下标头时：
我们注意到服务器响应反映了该值。
```http
X-Forwarded-Host: test.com
```
但是，只有当该标头在内部请求中被保留时，这种修改才可见。
通过发送大量带有此标头的请求，服务器最终会 **缓存内部响应**.
\*\* 对缓存内容的影响\*\*
最初以如下形式加载的脚本：
{% code overflow="wrap" %}
```html
```
{% endcode %}
在缓存被投毒后，会变成：
```html
```
```javascript
```
脚本的来源现在取决于通过以下方式注入的值： `X-Forwarded-Host`.
```http
X-Forwarded-Host: exploit-0a27006104d786ef8150bbc601bd0070.exploit-server.net
```
内部缓存被恶意响应投毒。/ 当受害者访问主页时，浏览器会从我们的服务器加载该脚本，从而执行：
```javascript
alert(document.cookie)
```
---
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