WebFund 2014W Lecture 21

Browser security
- content-provider conflict
- click fraud: fraud against advertisers, not ad networks
- facilitated by cross-site scripting vulnerabilities (XSS)
- also, cross-site request forgery (XSRF or CSRF)

XSS is just adding JavaScript to a page when you shouldn't be able to (from user-generated content).

XSRF is "confused deputy"

one tab: malware.com
another tab: bank.com, logged in
bank has RESTful API (e.g., POST, GET) for money transfers
what if malware.com does the same money transfer POST?
- how can the bank server tell the difference?
defenses: SSL, Origin: or Referer: headers

SQL Injection