October 2025
Intermediate to advanced
372 pages
5h 56m
Japanese
Content preview from 実践 Webペネトレーションテスト ―攻撃者の視点で学ぶWebアプリケーションセキュリティ
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6章クラウドサービスの調査
現代のWebアプリケーション開発において、クラウドサービスは不可欠な存在となっています。アプリケーションのインフラストラクチャ、データストレージ、認証基盤など、様々な側面でクラウドサービスが活用されています。しかし、その利便性の裏側には、設定不備や設計上の問題に起因するセキュリティリスクも潜んでいます。
Webペネトレーションテストの文脈においても、クラウド環境特有の設定不備を悪用する攻撃シナリオは珍しくありません。例えば、不適切な権限設定が施されたIAMプリンシパルや、公開設定が不適切なオブジェクトストレージなどが、攻撃者にとって侵入の足掛かりとなることがあります。
本章では、Webペネトレーションテストにおいて遭遇する可能性のある、クラウドサービスに関連した典型的な脆弱性や設定不備に焦点を当てて解説します。特に、AWS（Amazon Web Services）を中心に、IAM（Identity and Access Management）、Cognito、S3といったAWSサービスにおける具体的な攻撃手法や調査方法を取り上げます†1。
[†1] なお、本書で登場する各種IDや認証情報などについては、全て例示用です。実際に手を動かして学習したい場合は、本書籍のGitHubリポジトリ（https://github.com/oreilly-japan/practical-web-pentest）を参考に、環境を構築してください。
6.1 過剰な権限が付与されているIAMプリンシパル
IAMプリンシパルは、AWSリソースへのアクセス権限を持つエンティティです。IAMプリンシパルとしては、IAMユーザとIAMロールが該当します。各IAMプリンシパルには特定の権限が付与され、それに基づいてAWSリソースへのアクセスや操作が可能になります ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.