Re: Sandboxed iframes (was Re: Seamless iframes + CSS3 selectors = bad idea)

On Mon, Dec 7, 2009 at 7:56 PM, gaz Heyes <gazheyes@gmail.com> wrote:
> Has an anyone raised the issue that sandboxed iframes actually enable
> "clickjacking" when frame buster defences are applied?
>
> <iframe sandbox="allow-forms" src="http://twitter.com/login"></iframe>
>
> So here the spec says disable scripts but allow forms, this would render a
> javascript frame breaker useless.

Frame breakers are already useless.  You need to either do what
Twitter does (refuse to show the page until you've verified that
you're not in a frame) or use X-Frame-Options: deny.

Adam