> 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/ja/web/xxe/xxe-to-perform-ssrf-attacks.md).
# SSRF攻撃を実行するためのXXE
PortSwigger Web Security Academy のラボ向けメモ。SSRF攻撃を実行するためのXXEに関するもので、攻撃手順、ペイロードのテスト、Burp Suite による検証、および対策の文脈を含む。
### XXEを悪用してSSRF攻撃を実行する
XXE脆弱性を悪用する **「在庫を確認」** XMLを受け付ける機能で、EC2メタデータエンドポイント（`HTTP://169.254.169.254/`）および、サーバーから秘密のIAMキーを取得する。
ラボサーバーは、デフォルトの `HTTP://169.254.169.254/` アドレス。脆弱なパーサーに送信されるXMLに外部実体を注入することで、サーバーに内部URLを読み取らせ、その内容を応答として返させることができます。
#### XMLを開始
{% code overflow="wrap" %}
```xml
4
1
```
{% endcode %}
#### SSRFを実行するために使用するXXEペイロード
IAMメタデータエンドポイントを指す外部実体を参照し、その実体を反映フィールドに含める（`商品ID`):
```xml
]>
&myFile;
1
```
---
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