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[B! セキュリティ] shunt_iのブックマーク
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for="gh-search-icon-check" aria-label="検索を閉じる"><span>閉じる</span></label> <form class="gh-searchbox" method="get" action="/search_dwim" role="search"> <input value="" name="q" type="search" class="gh-inputtext" placeholder="キーワード・URLを検索" size="40" /> <input value="" type="submit" class="gh-search-button" /> </form> <ul class="gh-service-menu"> <li><a href="/guide" data-gtm-label="gh-guest-guide">はてなブックマークって?</a></li> <li><a href="/guide/tools" data-gtm-label="gh-guest-tools">アプリ・拡張の紹介</a></li> <li><a href="https://www.hatena.ne.jp/register?location=https%3A%2F%2Fb.hatena.ne.jp%2F%3Fregistered_from%3Dglobal-header&via=201037" class="gh-guest-register" data-gtm-label="gh-guest-register">ユーザー登録</a></li> <li><a href="https://www.hatena.ne.jp/login?location=https%3A%2F%2Fb.hatena.ne.jp%2Fshunt_i%2F%25E3%2582%25BB%25E3%2582%25AD%25E3%2583%25A5%25E3%2583%25AA%25E3%2583%2586%25E3%2582%25A3%2F" rel="nofollow" class="gh-guest-login" data-gtm-label="gh-guest-login">ログイン</a></li> <li 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href="{{hotentry_url}}">マイページ</a></li> <li><a class="bookmark" data-gtm-label="gh-bookmark" href="{{bookmark_url}}">ブックマーク</a></li> <li><a class="unread_bookmark" data-gtm-label="gh-ril" href="{{bookmark_stock_url}}">あとで読む</a></li> <li><a class="add" data-gtm-label="gh-add" href="{{add_bookmark_url}}">追加</a></li> <li><a class="tools" data-gtm-label="gh-tools" href="/guide/tools">ツール</a></li> <li><a class="config" data-gtm-label="gh-config" href="/-/my/config/profile">設定</a></li> <li><a class="feedback" data-gtm-label="gh-feedback" href="/-/feedback/hatena_bookmark" target="_blank">フィードバック</a></li> <li id="header-username" class="gh-dropdown-services" data-gtm-label="gh-services" title="利用中のサービス" data-name="{{username}}"> <span class="header-dropdown gh-dropdown" tabindex="0"> <img src="https://b.st-hatena.com/21bb37de101e3d895eac61554a1ca07012b63961/images/v4/public/common/usermenu-wh.svg" alt="利用中のサービス" width="24" height="24" /> </span> <dl class="header-window" 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href="/shunt_i/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3/windows/" > windows </a> </li> <li> <a href="/shunt_i/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80/" > あとで読む </a> </li> <li> <a href="/shunt_i/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3/%E3%83%81%E3%83%A5%E3%83%BC%E3%83%88%E3%83%AA%E3%82%A2%E3%83%AB/" > チュートリアル </a> </li> <li> <a href="/shunt_i/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3/%E3%83%8D%E3%83%83%E3%83%88%E3%83%AF%E3%83%BC%E3%82%AF/" > ネットワーク </a> </li> <li> <a href="/shunt_i/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3/%E5%8B%89%E5%BC%B7/" > 勉強 </a> </li> <li> <a href="/shunt_i/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3/%E7%94%9F%E6%B4%BB/" > 生活 </a> </li> <li> <a href="/shunt_i/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3/%E8%A8%AD%E8%A8%88/" > 設計 </a> </li> <li> <a 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id="template-bookmark-item"> {{^is_wiped}} <li class="bookmark-item js-user-bookmark-item js-intent-share-bookmark" data-target-url="{{url}}"> <div class="centerarticle-entry {{#has_image}}is-image-entry-unit{{/has_image}}"> <h3 class="centerarticle-entry-title"> <a href="{{url}}" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener{{#noreferrer}} noreferrer{{/noreferrer}}" data-gtm-click-label="user-bookmark-title"><img class="centerarticle-entry-favicon" src="{{favicon_url}}" alt="">{{title}}</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="{{page_url}}" class="js-keyboard-entry-page-openable" title="{{title}} ({{total_bookmarks}}ブックマーク)" data-gtm-click-label="user-bookmark-users">{{total_bookmarks_with_user_postfix}}</a> </span> </li> <li> <a href="/shunt_i/{{url_query}}" title="『{{root_title}}』の新着エントリー" data-gtm-click-label="user-bookmark-domain"> {{root_title}} </a> </li> {{#is_categorized}} <li><a href="{{category_path}}" data-gtm-click-label="user-bookmark-category">{{category_title}}</a></li> {{/is_categorized}} </ul> <div class="centerarticle-entry-contents"> <p class="centerarticle-entry-summary">{{{summary_with_keyword_links}}}</p> {{#has_image}} <a href="{{canonical_url}}" class="centerarticle-entry-image" target="_blank" rel="noopener{{#noreferrer}} noreferrer{{/noreferrer}}" data-gtm-click-label="user-bookmark-thumb"> <img src="{{image_url}}" alt="{{title}}"> </a> {{/has_image}} </div> </div> <div class="centerarticle-reaction js-user-bookmark-id-container" id="bookmark-{{location_id}}"> <div class="centerarticle-reaction-comment js-user-bookmark-comment {{badge_icon}}" data-url="{{url}}" data-user-name="{{author_name}}"> <a href="{{top_page_path}}" data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img src="{{profile_icon_url}}" alt="{{author_name}}" title="{{author_name}}" class="centerarticle-reaction-image"> </a> <div class="centerarticle-reaction-main"> <span class="centerarticle-reaction-username"><a href="{{anchor_url}}" class="js-anchor-path" data-gtm-click-label="user-reaction-username">{{author_name}}</a></span> <span class="centerarticle-reaction-timestamp">{{created}}</span> <span class="js-private-icon status {{#is_public}}is-hidden{{/is_public}}"><img src="/images/v4/public/userpage/icon-private.svg" alt="非公開" width="10px" height="10px"></span> <div class="centerarticle-reaction-main-comment-tags"> <span class="js-comment">{{{comment_expanded}}}</span> <ul class="centerarticle-reaction-tags js-tag-text"> {{#tags}} <li><a href="/{{author_name}}/{{escaped_label}}/" data-gtm-click-label="user-reaction-tag">{{label}}</a></li> {{/tags}} </ul> </div> <div class="centerarticle-reaction-foot"> <div class="centerarticle-reaction-meta"> <span class="{{#is_bookmark}}comment-permalink{{/is_bookmark}}{{^is_bookmark}}original-permalink{{/is_bookmark}} js-comment-permalink"> <a href="{{comment_page_path}}" data-gtm-click-label="user-reaction-permalink" rel="{{#should_nofollow}}nofollow{{/should_nofollow}}">{{#is_bookmark}}リスト{{/is_bookmark}}{{^is_bookmark}}リンク{{/is_bookmark}}</a> </span> <span class="list-star-container js-list-star-container"></span> <span class="twitter-click js-short-url-clicks"></span> </div> <ul class="centerarticle-reaction-menu"> <li class="js-add-star-container add-star-container"></li> </ul> </div> </div> </div> </div> <ul class="centerarticle-reaction-following js-user-following-bookmarks-icon"> {{#following_bookmarks}} <li> <a href="{{anchor_url}}" class="following-bookmark-link" data-gtm-click-label="user-bookmark-following-bookmarker-icon"> <img src="{{profile_icon_url}}" alt="{{author_name}}" class="following-bookmark-icon" > </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{author_name}}</span><span class="following-bookmark-timestamp">{{created}}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags"> {{ #tags }}<li>{{ label }}</li>{{ /tags }} </ul> </span> </span> </li> {{/following_bookmarks}} {{#following_bookmarks.length}} <li class="centerarticle-reaction-following-more"><button type="button" class="js-show-all-following-bookmarks" data-gtm-click-label="user-bookmark-showall-following-bookmarks">すべて表示</button></li> {{/following_bookmarks.length}} </ul> <div class="js-user-following-bookmarks-detail is-hidden"> {{#following_bookmarks}} <div class="centerarticle-reaction-comment js-user-bookmark-comment {{badge_icon}}" data-url="{{url}}" data-user-name="{{author_name}}"> <a href="{{top_page_path}}" data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img src="{{profile_icon_url}}" alt="{{author_name}}" title="{{author_name}}" class="centerarticle-reaction-image"> </a> <div class="centerarticle-reaction-main"> <span class="centerarticle-reaction-username"><a href="{{anchor_url}}" class="js-anchor-path" data-gtm-click-label="user-reaction-username">{{author_name}}</a></span> <span class="centerarticle-reaction-timestamp">{{created}}</span> <span class="js-private-icon status {{#is_public}}is-hidden{{/is_public}}"><img src="/images/v4/public/userpage/icon-private.svg" alt="非公開" width="10px" height="10px"></span> <div class="centerarticle-reaction-main-comment-tags"> <span class="js-comment">{{{comment_expanded}}}</span> <ul class="centerarticle-reaction-tags js-tag-text"> {{#tags}} <li><a href="/{{author_name}}/{{escaped_label}}/" data-gtm-click-label="user-reaction-tag">{{label}}</a></li> {{/tags}} </ul> </div> <div class="centerarticle-reaction-foot"> <div class="centerarticle-reaction-meta"> <span class="{{#is_bookmark}}comment-permalink{{/is_bookmark}}{{^is_bookmark}}original-permalink{{/is_bookmark}} js-comment-permalink"> <a 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class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags"> {{ #tags }}<li>{{ label }}</li>{{ /tags }} </ul> </span> </span> </li> </script> <script type="text/x-template" id="template-bookmark-item-editor"> <div class="centerarticle-entry {{#has_image}}is-image-entry-unit{{/has_image}}"> <h3 class="centerarticle-entry-title"> <a href="{{url}}" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener{{#noreferrer}} noreferrer{{/noreferrer}}" data-gtm-click-label="user-bookmark-title"><img class="centerarticle-entry-favicon" src="{{favicon_url}}" alt="">{{title}}</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="{{page_url}}" class="js-keyboard-entry-page-openable" title="{{title}} ({{total_bookmarks}}ブックマーク)" data-gtm-click-label="user-bookmark-users">{{total_bookmarks_with_user_postfix}}</a> </span> </li> <li> <a 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width="16" height="16" /></span> {{#previous}} <a href="{{page_path}}">{{label}}</a> {{/previous}} {{#pages}} {{#page_path}} <span><a href="{{page_path}}">{{label}}</a></span> {{/page_path}} {{^page_path}} <span>{{label}}</span> {{/page_path}} {{/pages}} {{#next}} <a href="{{page_path}}">{{label}}</a> {{/next}} </div> </li> </script> <ul class="js-user-bookmark-item-list js-keyboard-controllable-container"> <li class="bookmark-item js-user-bookmark-item js-intent-share-bookmark" data-target-url="https://devblog.lac.co.jp/entry/20250124"> <div class="centerarticle-entry is-image-entry-unit"> <h3 class="centerarticle-entry-title"> <a href="https://devblog.lac.co.jp/entry/20250124" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-title"><img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fdevblog.lac.co.jp%2Fentry%2F20250124" alt="">高級ホテルの客室タブレットに潜む危険:他客室も操作、盗聴可能だった脆弱性を発見するまで - ラック・セキュリティごった煮ブログ</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/devblog.lac.co.jp/entry/20250124" class="js-keyboard-entry-page-openable" title="高級ホテルの客室タブレットに潜む危険:他客室も操作、盗聴可能だった脆弱性を発見するまで - ラック・セキュリティごった煮ブログ (738ブックマーク)" data-gtm-click-label="user-bookmark-users">738 users</a> </span> </li> <li> <a href="/shunt_i/?url=https%3A%2F%2Fdevblog.lac.co.jp%2F" title="『devblog.lac.co.jp』の新着エントリー" data-gtm-click-label="user-bookmark-domain"> devblog.lac.co.jp </a> </li> <li><a href="/hotentry/it" data-gtm-click-label="user-bookmark-category">テクノロジー</a></li> </ul> <div class="centerarticle-entry-contents"> <p class="centerarticle-entry-summary">しゅーとです。 新婚<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%97%85%E8%A1%8C">旅行</a>で沖縄に行ってきたのですが、そこで泊まった高級リゾートホテルの客室にタブレットが置いてありました。 このタブレットを調査したところ、客室内の盗聴・盗撮が可能となる脆弱性や、第三者がネットワーク上から他客室のコントロール、チャットの盗聴が可能となる脆弱性を発見しました。この問題は<a data-gtm-click-label="entry-summary-keyword" href="/q/IPA">IPA</a>を通して開発者に報告し、報告から2年の年月を経て影響する全ホテルへの改修が完了し、公表されました。 <a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>記事ではキオスクアプリ開発者がよりセキュアなシステムを構成できるように、発見した脆弱性の原因と対策を解説します。 客室に設置されていた脆弱性を有するタブレット ※今回は稼働中システムに対する調査という背景を鑑み、他者の情報・資産を侵害しないよう細心の注意をもって調査しており、他者の情報が関連するセンシティブな問題についてはアクセスなどの実際の検証を行わず、複数の間接的な証跡をもって報告し</p> <a href="https://devblog.lac.co.jp/entry/20250124" class="centerarticle-entry-image" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-thumb"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/e49a319e7defbe1f2747ccaf618bf0d341e13fe5/height=288;version=1;width=512/https%3A%2F%2Fcdn.image.st-hatena.com%2Fimage%2Fscale%2F025880c87e78d61e1d4f5ebee525dd7202db27e6%2Fbackend%3Dimagemagick%3Bversion%3D1%3Bwidth%3D1300%2Fhttps%253A%252F%252Fcdn-ak.f.st-hatena.com%252Fimages%252Ffotolife%252Fl%252Flac_devblog%252F20250120%252F20250120025959.png" alt="高級ホテルの客室タブレットに潜む危険:他客室も操作、盗聴可能だった脆弱性を発見するまで - ラック・セキュリティごった煮ブログ"> </a> </div> </div> <div class="centerarticle-reaction js-user-bookmark-id-container" id="bookmark-4765269740221541088"> <div class="centerarticle-reaction-comment js-user-bookmark-comment " data-url="https://devblog.lac.co.jp/entry/20250124" data-user-name="shunt_i"> <a href="/shunt_i/" data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img src="https://cdn.profile-image.st-hatena.com/users/shunt_i/profile.png" alt="shunt_i" title="shunt_i" class="centerarticle-reaction-image"> </a> <div class="centerarticle-reaction-main"> <span class="centerarticle-reaction-username"><a href="https://b.hatena.ne.jp/shunt_i/20250124#bookmark-4765269740221541088" class="js-anchor-path" data-gtm-click-label="user-reaction-username">shunt_i</a></span> <span class="centerarticle-reaction-timestamp">2025/01/24</span> <span class="js-private-icon status is-hidden"><img 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<div class="js-user-following-bookmarks-detail is-hidden"> </div> </li> <li class="bookmark-item js-user-bookmark-item js-intent-share-bookmark" data-target-url="https://togetter.com/li/2321568"> <div class="centerarticle-entry is-image-entry-unit"> <h3 class="centerarticle-entry-title"> <a href="https://togetter.com/li/2321568" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-title"><img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Ftogetter.com%2Fli%2F2321568" alt="">「情報セキュリティの敗北史」が面白すぎる。だめだこれは寝れない、なんだこの死ぬほどワクワクする本は→賢者は歴史に学ぶ</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/togetter.com/li/2321568" class="js-keyboard-entry-page-openable" title="「情報セキュリティの敗北史」が面白すぎる。だめだこれは寝れない、なんだこの死ぬほどワクワクする本は→賢者は歴史に学ぶ (982ブックマーク)" data-gtm-click-label="user-bookmark-users">982 users</a> </span> </li> <li> <a href="/shunt_i/?url=https%3A%2F%2Ftogetter.com%2F" title="『togetter.com』の新着エントリー" data-gtm-click-label="user-bookmark-domain"> togetter.com </a> </li> <li><a href="/hotentry/it" data-gtm-click-label="user-bookmark-category">テクノロジー</a></li> </ul> <div class="centerarticle-entry-contents"> <p class="centerarticle-entry-summary">もよもよ。 @yoppu1eg 情報<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>の敗北史が面白すぎる。だめだこれは寝れない、なんだこの死ぬほどワクワクする<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>は。まだ3章だぞ?これだこのことが私が生まれる少し前から起きてたのか??なんで、3ヶ月くらい寝かしてたの?この<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>?? pic.<a data-gtm-click-label="entry-summary-keyword" href="/q/twitter">twitter</a>.com/3vHXxg2W1h 2024-02-26 01:11:06 今日の情報<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>が抱える致命的な〈脆弱性〉は、どこから来たのか? コンピュータの誕生前夜から現代のハッキング<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%88%A6%E4%BA%89">戦争</a>まで、半世紀以上にわたるサイバー空間の攻防を描いた、情報<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>史の決定版。</p> <a href="https://togetter.com/li/2321568" class="centerarticle-entry-image" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-thumb"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/dbc8888021eee38838bea3e678901aec1ab0816d/height=288;version=1;width=512/https%3A%2F%2Fs.tgstc.com%2Fogp3%2Ff5c22b2450bbbb99791ed2e6089e85c6-1200x630.jpeg" alt="「情報セキュリティの敗北史」が面白すぎる。だめだこれは寝れない、なんだこの死ぬほどワクワクする本は→賢者は歴史に学ぶ"> </a> </div> </div> <div class="centerarticle-reaction js-user-bookmark-id-container" id="bookmark-4749837030800950080"> <div class="centerarticle-reaction-comment js-user-bookmark-comment " data-url="https://togetter.com/li/2321568" data-user-name="shunt_i"> <a href="/shunt_i/" 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Draft of this art<a data-gtm-click-label="entry-summary-keyword" href="/q/ICL">icl</a>e would be also deleted. Are you sure you want to delete this art<a data-gtm-click-label="entry-summary-keyword" href="/q/ICL">icl</a>e? ゴールデンウィークのはじめ(4月29日)に投稿された以下のツイートですが、5月7日20時において、1,938.8万件の表示ということで、非常に注目されていることが分かります。 我が名はアシタカ!スタバのFree<a data-gtm-click-label="entry-summary-keyword" href="/q/Wi-Fi">Wi-Fi</a>を使いながら会社の機密情報を扱う<a data-gtm-click-label="entry-summary-keyword" href="/q/%E4%BB%95%E4%BA%8B">仕事</a>をしてたら全部抜かれた。どうすればよい! pic.<a data-gtm-click-label="entry-summary-keyword" href="/q/twitter">twitter</a>.com/e26L1Bj32Z — スタバで<a data-gtm-click-label="entry-summary-keyword" href="/q/mac">Mac</a>を開く<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%A8%E3%83%B3%E3%82%B8%E3%83%8B%E3%82%A2">エンジニア</a> (@<a data-gtm-click-label="entry-summary-keyword" href="/q/mac">Mac</a>openinSUTABA) April 29, <a data-gtm-click-label="entry-summary-keyword" href="/q/2023">2023</a> これに対して、私は以下のようにツイートしましたが、 これ入社試験の問題にしようかな。『</p> <a href="https://qiita.com/ockeghem/items/c6a3602d2c2409f89fbb" class="centerarticle-entry-image" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-thumb"> <img 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alt="フリーWi-Fiを使ったら秘密情報を抜かれる経路にはどのようなものがあるか - Qiita"> </a> </div> </div> <div class="centerarticle-reaction js-user-bookmark-id-container" id="bookmark-4736188380825491877"> <div class="centerarticle-reaction-comment js-user-bookmark-comment " data-url="https://qiita.com/ockeghem/items/c6a3602d2c2409f89fbb" data-user-name="shunt_i"> <a href="/shunt_i/" data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img src="https://cdn.profile-image.st-hatena.com/users/shunt_i/profile.png" alt="shunt_i" title="shunt_i" class="centerarticle-reaction-image"> </a> <div class="centerarticle-reaction-main"> <span class="centerarticle-reaction-username"><a href="https://b.hatena.ne.jp/shunt_i/20230509#bookmark-4736188380825491877" class="js-anchor-path" data-gtm-click-label="user-reaction-username">shunt_i</a></span> <span class="centerarticle-reaction-timestamp">2023/05/09</span> <span class="js-private-icon status is-hidden"><img 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<div class="js-user-following-bookmarks-detail is-hidden"> </div> </li> <li class="bookmark-item js-user-bookmark-item js-intent-share-bookmark" data-target-url="https://www.ipa.go.jp/security/guide/vuln/guideforecsite.html"> <div class="centerarticle-entry is-image-entry-unit"> <h3 class="centerarticle-entry-title"> <a href="https://www.ipa.go.jp/security/guide/vuln/guideforecsite.html" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-title"><img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fwww.ipa.go.jp%2Fsecurity%2Fguide%2Fvuln%2Fguideforecsite.html" alt="">ECサイト構築・運用セキュリティガイドライン | 情報セキュリティ | IPA 独立行政法人 情報処理推進機構</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/www.ipa.go.jp/security/guide/vuln/guideforecsite.html" class="js-keyboard-entry-page-openable" title="ECサイト構築・運用セキュリティガイドライン | 情報セキュリティ | IPA 独立行政法人 情報処理推進機構 (575ブックマーク)" data-gtm-click-label="user-bookmark-users">575 users</a> </span> </li> <li> <a href="/shunt_i/?url=https%3A%2F%2Fwww.ipa.go.jp%2F" title="『www.ipa.go.jp』の新着エントリー" data-gtm-click-label="user-bookmark-domain"> www.ipa.go.jp </a> </li> <li><a href="/hotentry/it" data-gtm-click-label="user-bookmark-category">テクノロジー</a></li> </ul> <div class="centerarticle-entry-contents"> <p class="centerarticle-entry-summary">近年、ECサイトからの個人情報及び<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%AF%E3%83%AC%E3%82%B8%E3%83%83%E3%83%88%E3%82%AB%E3%83%BC%E3%83%89">クレジットカード</a>情報の流出<a data-gtm-click-label="entry-summary-keyword" href="/q/%E4%BA%8B%E4%BB%B6">事件</a>が多数発生しており、被害の大半を中小企業の自社構築サイトが占めています。中小企業の自社構築サイトにおいては、<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>対策の必要性が十分に理解されていないため、適切な<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>対策が行われず被害を招いている状況です。 ECサイトの<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>対策を強化するため、<a data-gtm-click-label="entry-summary-keyword" href="/q/IPA">IPA</a>ではECサイト構築・運用時の<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>対策をまとめた「ECサイト構築・運用<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>ガイドライン」を作成し、<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>日(<a data-gtm-click-label="entry-summary-keyword" href="/q/2023">2023</a>年3月16日)、公開しました。 ガイドラインの内容 ECサイトでひとたび事故及び被害を発生させてしまうと、ECサイトの長期間の閉鎖に伴う売上高の大幅な減少や、原因調査や被害の補償等の事故対応費用を含む甚大な経済的損失が発生します。 <a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>ガイドラインは、ECサイトを構築、運営されている中小企業の皆様に、ECサイトの<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>対策を実施する</p> <a href="https://www.ipa.go.jp/security/guide/vuln/guideforecsite.html" class="centerarticle-entry-image" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-thumb"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/b9ae4e41e8b2184c612831da1241b4cf079ca73a/height=288;version=1;width=512/https%3A%2F%2Fwww.ipa.go.jp%2Fk3q2q400000050d7-img%2Fk3q2q400000050dg.png" alt="ECサイト構築・運用セキュリティガイドライン | 情報セキュリティ | IPA 独立行政法人 情報処理推進機構"> </a> </div> </div> <div class="centerarticle-reaction js-user-bookmark-id-container" id="bookmark-4733733234471578084"> <div class="centerarticle-reaction-comment js-user-bookmark-comment " data-url="https://www.ipa.go.jp/security/guide/vuln/guideforecsite.html" data-user-name="shunt_i"> <a href="/shunt_i/" data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img 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Dismiss alert</p> <a href="https://github.com/ockeghem/badtodo" class="centerarticle-entry-image" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-thumb"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/7ace96e7073e997034547cadca09a3f164d10942/height=288;version=1;width=512/https%3A%2F%2Fopengraph.githubassets.com%2F0162ce847d63114633f9ba75a0c05fedf40d57dad94750775fdb2f2e5c247a9b%2Fockeghem%2Fbadtodo" alt="GitHub - Bad Todo 非常に多種の脆弱性を含む診断実習やられアプリ"> </a> </div> </div> <div class="centerarticle-reaction js-user-bookmark-id-container" id="bookmark-4733005291921888932"> <div class="centerarticle-reaction-comment js-user-bookmark-comment " data-url="https://github.com/ockeghem/badtodo" data-user-name="shunt_i"> <a href="/shunt_i/" data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img src="https://cdn.profile-image.st-hatena.com/users/shunt_i/profile.png" alt="shunt_i" title="shunt_i" class="centerarticle-reaction-image"> </a> <div class="centerarticle-reaction-main"> <span class="centerarticle-reaction-username"><a href="https://b.hatena.ne.jp/shunt_i/20230301#bookmark-4733005291921888932" class="js-anchor-path" data-gtm-click-label="user-reaction-username">shunt_i</a></span> <span class="centerarticle-reaction-timestamp">2023/03/01</span> <span class="js-private-icon status is-hidden"><img src="/images/v4/public/userpage/icon-private.svg" alt="非公開" width="10px" height="10px"></span> <div class="centerarticle-reaction-main-comment-tags"> <span class="js-comment"></span> <ul class="centerarticle-reaction-tags js-tag-text"> <li><a href="/shunt_i/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3/" data-gtm-click-label="user-reaction-tag">セキュリティ</a></li> </ul> </div> <div class="centerarticle-reaction-foot"> <div class="centerarticle-reaction-meta"> <span class="comment-permalink js-comment-permalink"> <a href="/entry/4733005291921888932/comment/shunt_i" data-gtm-click-label="user-reaction-permalink" rel="nofollow">リンク</a> </span> <span class="list-star-container js-list-star-container"></span> <span class="twitter-click js-short-url-clicks"></span> </div> <ul class="centerarticle-reaction-menu"> <li class="js-add-star-container add-star-container"></li> </ul> </div> </div> </div> </div> <ul class="centerarticle-reaction-following js-user-following-bookmarks-icon"> </ul> <div class="js-user-following-bookmarks-detail is-hidden"> </div> </li> <li class="bookmark-item js-user-bookmark-item js-intent-share-bookmark" data-target-url="https://www.itmedia.co.jp/news/articles/2302/28/news211.html"> <div class="centerarticle-entry is-image-entry-unit"> <h3 class="centerarticle-entry-title"> <a href="https://www.itmedia.co.jp/news/articles/2302/28/news211.html" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-title"><img class="centerarticle-entry-favicon" 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BadTodoは脆弱性診断実習用のアプリ。情報<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>の専門家であり同社CTOの徳丸浩さんが制作した。Webブラウザ上で動くToDoリストアプリとして動作するが、情報処理推進機構(<a data-gtm-click-label="entry-summary-keyword" href="/q/IPA">IPA</a>)の「<a data-gtm-click-label="entry-summary-keyword" href="/q/IPA">IPA</a> ウェブ健康診断仕様」や国際Web<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>標準機構の「OWASP <a data-gtm-click-label="entry-summary-keyword" href="/q/top">Top</a> 10」で紹介されている脆弱性を網羅的に含む、脆弱性だらけのアプリになっている。 EGセキュアソリューションズによると、BadTodoには各種脆弱性を自然な形で組み込んでおり、脆弱性スキャンで見つかりにくい項目も含んでいるという。 徳</p> <a href="https://www.itmedia.co.jp/news/articles/2302/28/news211.html" class="centerarticle-entry-image" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-thumb"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/cc0e37238902f5daaec4fd35eaf5c3ffe2d14b6e/height=288;version=1;width=512/https%3A%2F%2Fimage.itmedia.co.jp%2Fnews%2Farticles%2F2302%2F28%2Fcover_news211.jpg" alt="情報セキュリティ企業が“脆弱性だらけのWebアプリ”無償公開 実習用の題材に"> </a> </div> </div> <div class="centerarticle-reaction js-user-bookmark-id-container" id="bookmark-4733005201190656452"> <div class="centerarticle-reaction-comment js-user-bookmark-comment " data-url="https://www.itmedia.co.jp/news/articles/2302/28/news211.html" data-user-name="shunt_i"> <a href="/shunt_i/" data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img src="https://cdn.profile-image.st-hatena.com/users/shunt_i/profile.png" alt="shunt_i" title="shunt_i" class="centerarticle-reaction-image"> </a> <div class="centerarticle-reaction-main"> <span class="centerarticle-reaction-username"><a href="https://b.hatena.ne.jp/shunt_i/20230301#bookmark-4733005201190656452" class="js-anchor-path" 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data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img src="https://cdn.profile-image.st-hatena.com/users/shunt_i/profile.png" alt="shunt_i" title="shunt_i" class="centerarticle-reaction-image"> </a> <div class="centerarticle-reaction-main"> <span class="centerarticle-reaction-username"><a href="https://b.hatena.ne.jp/shunt_i/20230126#bookmark-4731464580621830084" class="js-anchor-path" data-gtm-click-label="user-reaction-username">shunt_i</a></span> <span class="centerarticle-reaction-timestamp">2023/01/26</span> <span class="js-private-icon status is-hidden"><img src="/images/v4/public/userpage/icon-private.svg" alt="非公開" width="10px" height="10px"></span> <div class="centerarticle-reaction-main-comment-tags"> <span class="js-comment">“Wi-Fiルーターにはお使いのプロバイダー情報などが記憶されているので、廃棄の前に必ず初期化作業が必要です。具体的には、電源が入った状態で「RESET」ボタンの「POWER」ランプが点滅するまで(約3秒間)押し続ける”</span> <ul class="centerarticle-reaction-tags js-tag-text"> <li><a 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href="/shunt_i/?url=https%3A%2F%2Fatmarkit.itmedia.co.jp%2F" title="『atmarkit.itmedia.co.jp』の新着エントリー" data-gtm-click-label="user-bookmark-domain"> atmarkit.itmedia.co.jp </a> </li> <li><a href="/hotentry/it" data-gtm-click-label="user-bookmark-category">テクノロジー</a></li> </ul> <div class="centerarticle-entry-contents"> <p class="centerarticle-entry-summary">無料で「開発における<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>の基<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>」を学べる18時間のオンライン講座、<a data-gtm-click-label="entry-summary-keyword" href="/q/Linux">Linux</a> Foundationが開講:「攻撃されてから対応したのでは遅い」 The <a data-gtm-click-label="entry-summary-keyword" href="/q/Linux">Linux</a> Foundation Japanは、オンライン講座「セキュアソフトウェア開発」を開講した。オープンソースやその他のソフトウェアを安全に使用、開発する方法について無料で学習できる。</p> <a href="https://atmarkit.itmedia.co.jp/ait/articles/2212/06/news041.html" class="centerarticle-entry-image" target="_blank" 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href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a><a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%A8%E3%83%B3%E3%82%B8%E3%83%8B%E3%82%A2">エンジニア</a>の冨士です。 <a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>稿では、XSS(クロスサイトスクリプティング)が攻撃に用いられた時のリスクの大きさを紹介していきます。以降はクロスサイトスクリプティングをXSSと記載していきます。 XSSは<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a><a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%A8%E3%83%B3%E3%82%B8%E3%83%8B%E3%82%A2">エンジニア</a>ならもちろん、開発を行っている<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%A8%E3%83%B3%E3%82%B8%E3%83%8B%E3%82%A2">エンジニア</a>の多くの方が知っている脆弱性です。ですが、私はWebアプリケーションの脆弱性診断を行ってきた経験の中で多くのXSSを目にしてきましたし、依然として検出率の多い脆弱性の一つだと感じています。 その認知度や、一般的な対策方法のハードルの低さ(設計や仕様によっては対策工数が大きい場合もありますが)にも関わらずXSSの検出率が多いのは、直感的にリスクがわかりづらく、アラートをあげるだけの紹介が多いことが一つの要因ではないかと考えています。 すなわち、興味範囲が「どのよう</p> <a 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class="centerarticle-reaction-following js-user-following-bookmarks-icon"> </ul> <div class="js-user-following-bookmarks-detail is-hidden"> </div> </li> <li class="bookmark-item js-user-bookmark-item js-intent-share-bookmark" data-target-url="https://persol-tech-s.co.jp/i-engineer/technology/securitycaptcha"> <div class="centerarticle-entry is-image-entry-unit"> <h3 class="centerarticle-entry-title"> <a href="https://persol-tech-s.co.jp/i-engineer/technology/securitycaptcha" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-title"><img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fstaff.persol-xtech.co.jp%2Fi-engineer%2Ftechnology%2Fsecuritycaptcha" alt="">「私はロボットではありません」はワンクリックでなぜ人間を判別できる? 仕組みとその限界を聞いてきた</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/staff.persol-xtech.co.jp/i-engineer/technology/securitycaptcha" class="js-keyboard-entry-page-openable" title="「私はロボットではありません」はワンクリックでなぜ人間を判別できる? 仕組みとその限界を聞いてきた (855ブックマーク)" data-gtm-click-label="user-bookmark-users">855 users</a> </span> </li> <li> <a href="/shunt_i/?url=https%3A%2F%2Fstaff.persol-xtech.co.jp%2F" title="『staff.persol-xtech.co.jp』の新着エントリー" data-gtm-click-label="user-bookmark-domain"> staff.persol-xtech.co.jp </a> </li> <li><a href="/hotentry/it" data-gtm-click-label="user-bookmark-category">テクノロジー</a></li> </ul> <div class="centerarticle-entry-contents"> <p class="centerarticle-entry-summary">2021.02.16 「私はロボットではありません」はワンクリックでなぜ人間を判別できる? 仕組みとその限界を聞いてきた WebサイトにIDとパスワードを入力するとき、ときどき「私はロボットではありません」にチェックを求められることがあります。 僕はロボットではないので、当然チェックを入れて認証を進めるわけですが……。でもちょっと待ってください。なぜクリックひとつで、人間かロボットかを判断できるんでしょう。 これはきっと、人間ではないなんらかの不正アクセスを防ぐ仕組みのはず。でもチェックを入れるくらい、プログラムを作ってなんやかんやすれば、シュッとできるのでは? 「私はロボットではありません」は、どんな仕組みで人間とロボットを判別しているのか。もっといい方法はないのか。これまでの<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%AD%B4%E5%8F%B2">歴史</a>的経緯も含め、情報<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>大学院大学の大久保隆夫教授に聞きました。 気づかないうちに「人間かロボットか」</p> <a href="https://staff.persol-xtech.co.jp/i-engineer/technology/securitycaptcha" class="centerarticle-entry-image" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-thumb"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/a71d26f01bfbf9e8bcfd07a8fd02a9e5430eae94/height=288;version=1;width=512/https%3A%2F%2Fstaff.persol-xtech.co.jp%2Fi-engineer%2Fwp-content%2Fuploads%2F2021%2F01%2Fsecuritycaptcha_SNS.jpg" alt="「私はロボットではありません」はワンクリックでなぜ人間を判別できる? 仕組みとその限界を聞いてきた"> </a> </div> </div> <div class="centerarticle-reaction js-user-bookmark-id-container" id="bookmark-4698586558265190626"> <div class="centerarticle-reaction-comment js-user-bookmark-comment " data-url="https://persol-tech-s.co.jp/i-engineer/technology/securitycaptcha" data-user-name="shunt_i"> <a href="/shunt_i/" data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img src="https://cdn.profile-image.st-hatena.com/users/shunt_i/profile.png" alt="shunt_i" title="shunt_i" class="centerarticle-reaction-image"> </a> <div class="centerarticle-reaction-main"> <span class="centerarticle-reaction-username"><a href="https://b.hatena.ne.jp/shunt_i/20210217#bookmark-4698586558265190626" class="js-anchor-path" data-gtm-click-label="user-reaction-username">shunt_i</a></span> <span class="centerarticle-reaction-timestamp">2021/02/17</span> <span class="js-private-icon status is-hidden"><img src="/images/v4/public/userpage/icon-private.svg" alt="非公開" width="10px" height="10px"></span> <div class="centerarticle-reaction-main-comment-tags"> <span class="js-comment"></span> <ul class="centerarticle-reaction-tags js-tag-text"> <li><a 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data-gtm-click-label="user-bookmark-category">テクノロジー</a></li> </ul> <div class="centerarticle-entry-contents"> <p class="centerarticle-entry-summary"><a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3">セキュリティ</a>は難しいです。 ですが、プログラミング初学者の皆さんは必要以上に萎縮せず、どんどんアプリケーションを作り、公開することにチャレンジして欲しいと私は思っています。 一方、事実として、脆弱なアプリケーションが公開されている(サーバ上でアクセス可能な状態になっている)だけで、全く無関係な第三者が被害を被る可能性があることは知っておく必要があります。 それは<a data-gtm-click-label="entry-summary-keyword" href="/q/WordPress">WordPress</a>を使った単なるWebサイトであったとしても同じです。 また、あなたのアプリケーションが破壊されて困らないものであったり、 個人情報を保持していないものであったとしても、です。 だから、知らなかった、では済まされないこともあります。 この記事では、<a data-gtm-click-label="entry-summary-keyword" href="/q/php">PHP</a>のソースを例に、 特にプログラミング初学者が生み出しやすいアプリケーションの脆弱性について、 具体的なコードを挙げながら解説します。 なお、<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>記事のサンプルコードはも</p> <a href="https://zenn.dev/ad5/articles/5e4e67c9663e4e0d0cb0" class="centerarticle-entry-image" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-thumb"> <img 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width="10px" height="10px"></span> <div class="centerarticle-reaction-main-comment-tags"> <span class="js-comment"></span> <ul class="centerarticle-reaction-tags js-tag-text"> <li><a href="/shunt_i/php/" data-gtm-click-label="user-reaction-tag">php</a></li> <li><a href="/shunt_i/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3/" data-gtm-click-label="user-reaction-tag">セキュリティ</a></li> </ul> </div> <div class="centerarticle-reaction-foot"> <div class="centerarticle-reaction-meta"> <span class="comment-permalink js-comment-permalink"> <a href="/entry/4691961427961385538/comment/shunt_i" data-gtm-click-label="user-reaction-permalink" rel="nofollow">リンク</a> </span> <span class="list-star-container js-list-star-container"></span> <span class="twitter-click js-short-url-clicks"></span> </div> <ul class="centerarticle-reaction-menu"> <li class="js-add-star-container add-star-container"></li> </ul> </div> </div> </div> </div> <ul class="centerarticle-reaction-following js-user-following-bookmarks-icon"> </ul> <div class="js-user-following-bookmarks-detail is-hidden"> </div> </li> <li class="bookmark-item js-user-bookmark-item js-intent-share-bookmark" data-target-url="https://qiita.com/shioshiota/items/a2c414e2bbd2be654511"> <div class="centerarticle-entry is-image-entry-unit"> <h3 class="centerarticle-entry-title"> <a href="https://qiita.com/shioshiota/items/a2c414e2bbd2be654511" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-title"><img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fqiita.com%2Fshioshiota%2Fitems%2Fa2c414e2bbd2be654511" alt="">Webサービスによくある各機能の仕様とセキュリティ観点(ユーザ登録機能) - Qiita</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/qiita.com/shioshiota/items/a2c414e2bbd2be654511" class="js-keyboard-entry-page-openable" title="Webサービスによくある各機能の仕様とセキュリティ観点(ユーザ登録機能) - Qiita (102ブックマーク)" data-gtm-click-label="user-bookmark-users">102 users</a> </span> </li> <li> <a href="/shunt_i/?url=https%3A%2F%2Fqiita.com%2Fshioshiota" title="『qiita.com/shioshiota』の新着エントリー" data-gtm-click-label="user-bookmark-domain"> qiita.com/shioshiota </a> </li> <li><a href="/hotentry/it" data-gtm-click-label="user-bookmark-category">テクノロジー</a></li> </ul> <div class="centerarticle-entry-contents"> <p class="centerarticle-entry-summary">みたいな画面が出るパターン。 観点1: 第三者のメールアドレス・電話番号の登録状況が確認できてしまう この仕様は、多くのサイトで実装されています。 が、二つの観点で注意が必要です。 「サービスに登録している」という事実が漏洩してしまう サービスの性質や法務的観点・ポリシーなど考慮しつつ判断が必要です リスト型攻撃の攻撃準備に悪用されてしまう 流出済みID/パスワードの組を利用する際、登録済みIDだけを抽出する作業に悪用されてしまいます セシールオンラインショップへの不正アクセス、二重登録防止機能を悪用しリストをスクリーニング(ディノス・セシール) 事例とともにすでに解説記事があったので引用します 「大手サイトもやっているじゃないか!」という意見もあるかと思いますが、認証機能への監視・リスト型対策・自動化対策が成熟していると思われるサービスの仕様を新規に作るサービスで真似するのは、難しい場合</p> <a href="https://qiita.com/shioshiota/items/a2c414e2bbd2be654511" class="centerarticle-entry-image" target="_blank" rel="noopener" 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src="/images/v4/public/userpage/icon-private.svg" alt="非公開" width="10px" height="10px"></span> <div class="centerarticle-reaction-main-comment-tags"> <span class="js-comment">CSRF</span> <ul class="centerarticle-reaction-tags js-tag-text"> <li><a href="/shunt_i/%E9%96%8B%E7%99%BA/" data-gtm-click-label="user-reaction-tag">開発</a></li> <li><a href="/shunt_i/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3/" data-gtm-click-label="user-reaction-tag">セキュリティ</a></li> </ul> </div> <div class="centerarticle-reaction-foot"> <div class="centerarticle-reaction-meta"> <span class="comment-permalink js-comment-permalink"> <a href="/entry/4680915645404378050/comment/shunt_i" data-gtm-click-label="user-reaction-permalink" rel="nofollow">リンク</a> </span> <span class="list-star-container js-list-star-container"></span> <span class="twitter-click js-short-url-clicks"></span> </div> <ul class="centerarticle-reaction-menu"> <li class="js-add-star-container add-star-container"></li> </ul> </div> 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