When Ajax Attacks! Web application security fundamentals

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Web application security is hard, and getting harder. New technologies and techniques mean new vulnerabilities, and keeping on top of them all is a significant challenge. This talk will dive deep in to the underbelly of JavaScript security, exploring topics ranging from basic cross-site scripting to CSRF, social network worms, HTML sanitisation, securing JSON, safe cross-domain JavaScript and more besides.

Presented at @media Ajax 2008 on the 16th of September.

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When Ajax Attacks! Web application security fundamentals

  1. When Ajax Attacks! Web application security fundamentals Simon Willison, @media Ajax 2008
  2. I’m here to scare you • XSS • PDF • CSRF • XBL • UTF-7 • HTC • crossdomain.xml • JSON and JSONP
  3. A few years ago... • Web application security tutorials tended to boil down to three things: • Don’t trust input from users • Avoid SQL injection attacks • Don’t let people inject JS in to your pages
  4. A few years ago... • Web application security tutorials tended to boil down to three things: • Don’t trust input from users Boring! • Avoid SQL injection attacks • Don’t let people inject JS in to your pages

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