Web Application Security with Subresource Integrity

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Subresource Integrity WEB APPLICATION SECURITY WITH

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$ WHOIAM

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$ WHOIAM JUSTIN DORFMAN

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$ WHOIAM JUSTIN DORFMAN MAXCDN

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$ WHOIAM JUSTIN DORFMAN MAXCDN DEVELOPER RELATIONS

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$ WHOIAM JUSTIN DORFMAN MAXCDN DEVELOPER RELATIONS OBSESSED WITH OPEN SOURCE & STANDARDS

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$ WHOIAM JUSTIN DORFMAN MAXCDN DEVELOPER RELATIONS OBSESSED WITH OPEN SOURCE & STANDARDS SRI ADVOCATE

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DEFINE “INTEGRITY”

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SUBRESOURCE INTEGRITY ENABLES BROWSERS TO VERIFY THAT FILES ARE DELIVERED WITHOUT UNEXPECTED MANIPULATION.

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SUBRESOURCE INTEGRITY ENABLES BROWSERS TO VERIFY THAT FILES ARE DELIVERED WITHOUT UNEXPECTED MANIPULATION.

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WITH & WITHOUT SUBRESOURCE INTEGRITY

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document.write('')

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document.write('') bootstrap.min.js

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document.write('') bootstrap.min.js

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function imgflood() {   var TARGET = 'victim-website.com'  var URI = '/index.php?'  var pic = new Image()  var rand = Math.floor(Math.random() * 1000)  pic.src = 'http://'+TARGET+URI+rand+'=val'  }  setInterval(imgflood, 10) demo JS code via https://blog.cloudﬂare.com/an-introduction-to-javascript-based-ddos/

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JAVASCRIPT DDOS!

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HISTORY

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WEB APPLICATION SECURITY WORKING GROUP

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SRI TIMELINE

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SRI TIMELINE JANUARY 8TH 2014 - DISCUSSION STARTS ON W3C’S GITHUB

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SRI TIMELINE JANUARY 8TH 2014 - DISCUSSION STARTS ON W3C’S GITHUB MARCH 18TH 2014 - FIRST PUBLIC WORKING DRAFT ON W3C.ORG

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SRI TIMELINE JANUARY 8TH 2014 - DISCUSSION STARTS ON W3C’S GITHUB MARCH 18TH 2014 - FIRST PUBLIC WORKING DRAFT ON W3C.ORG OCTOBER 6TH 2015 - FINAL PUBLIC WORKING DRAFT

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SRI TIMELINE JANUARY 8TH 2014 - DISCUSSION STARTS ON W3C’S GITHUB MARCH 18TH 2014 - FIRST PUBLIC WORKING DRAFT ON W3C.ORG OCTOBER 6TH 2015 - FINAL PUBLIC WORKING DRAFT NOVEMBER 12TH 2015 - W3C CANDIDATE RECOMMENDATION

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SUPPORT & AVAILABILITY

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Desktop Browser Support

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Desktop Browser Support

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Desktop Browser Support

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Desktop Browser Support

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Mobile Browser Support

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Mobile Browser Support

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CREATING HASHES

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QUESTIONS?

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THANK YOU Read more: https://j.mp/MaxCDN-SRI Twitter/GitHub: @jdorfman