> 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-vulnerabilities/deserialization-yaml-attack/des-yaml-base64-url-pentesting-web.md).
# YAML デシリアライズ Base64 URL
YAML デシリアライズ Base64 URLに関する、Webアプリケーションのペネトレーションテスト、エクスプロイトのワークフロー、ペイロード検証、影響評価、修正の文脈でのメモ。
その **URL**、説明に表示されているコンテンツはエンコードされています **base64**:
base64 の en text をデコードすると、これがそのテキストと確かに一致することがわかります:
できるかどうかを確認するためにテストを行います **このコンテンツを変更する** こちら側からです。"yaml:" を追加する必要があります:
その後、コマンドの注入を試みます。この場合は **id** コマンドは次のとおりです:
```bash
yaml: !!python/object/apply:subprocess.check_output ['id']
```
---
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