> 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/xxe/xxe-via-malicious-image-upload.md).
# 通过恶意图片上传的 XXE
通过恶意图片上传的 XXE 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。
### 通过图片文件上传利用 XXE
通过发送一个恶意图片（SVG）来利用 XXE 漏洞，该图片在 Apache Batik 库处理过程中会泄露本地文件的内容。该练习要求上传一个显示 `/etc/hostname` 内容的 SVG 头像，然后提交主机名作为答案。
该站点提供了一个为评论添加 d的头像的表单。通过拦截 d
创建一个包含 `` 语句，用于定义一个指向 `file:///etc/hostname` 的外部实体，然后将该实体插入到 SVG 文本中，这样在渲染/处理后，文件内容就会被注入到显示的图片中。
```svg
]>
```
上传后，在评论区显示该头像时可见，服务器已经解析了 SVG 并返回了实体值——即 `/etc/hostname` 的内容出现在图片中，从而可以获取主机名并提交答案。
---
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