> 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/dom/dom-based-cookie-manipulation.md).
# 基于 DOM 的 Cookie 操作
基于 DOM 的 Cookie 操作笔记，适用于 PortSwigger Web Security Academy 实验室，包括利用流程、载荷测试、Burp Suite 验证和修复上下文。
### 基于 DOM 的 Cookie 操作
本实验展示了对 cookie 的客户端（DOM）操作，可将一个值注入到 `lastViewedProduct` cookie 中。更改此值可能会导致另一页面上的内容执行（XSS），并调用 `print()` 函数。利用方式是通过利用服务器将受害者引导至所需页面。
* 有一个名为 `lastViewedProduct` 的会话 cookie，其中包含最近查看产品的链接。
* 在页面上有一个“最近查看的产品”部分，其中有一个锚点，例如 `<a href=".../product?productId=1">最近查看的产品</a>`.
* 通过修改存储为“上次页面查看”的值，显示的链接可以被解释为 HTML/JS。
* 通过将 cookie 值替换为外部 URL（`https://jord4n.pro`）该链接会重定向到这个站点。
插入 `JavaScript:print()` 到该值中会被浏览器在此上下文中解释。
* 通过注入包含 HTML 的有效载荷，例如 `productId=1&'>
TEST
`，内容会被渲染。
{% code overflow="wrap" %}
```html
最近查看的产品
```
{% endcode %}
像这样的脚本有效载荷 `productId=1&'>` 也会被解释并触发 `print()`.
```
productId=1&'>
```
1. 将受害者的 `lastViewedProduct` cookie 中存储一个包含注入内容的值（产品页面用于保存该值）。
2. 然后将受害者引导到主页（或显示“最近查看的产品”的页面），这样格式错误的值就会被返回并执行脚本（`print()`).
3. 使用利用服务器来安排先重定向到产品页面（该页面会写入 cookie），然后再重定向到显示该 cookie 的页面。
{% code overflow="wrap" %}
```javascript
```
{% endcode %}
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