Re: Browser bugs hit IE, Firefox today (SANS)

[3CO <threecheeseopera () gmail com>]

On 7/4/06, Thor Larholm <thor () polypath com> wrote:
> However, reading the contentDocument property of the DOM element instead
> of the through the frames collection will give you a reference to the
> document object inside the thirdparty domain and even allow you to
> overwrite native DOM methods without throwing a security exception, such
> as
> document.getElementById("thirdparty").contentDocument.getElementById=function(s){alert(s)}.


This code throws an exception in Firefox 1.5.0.4:
"Error: uncaught exception: Permission denied to set property
HTMLDocument.getElementById
"

Just obtaining a reference to the contentDocument works, but any
action on it throws an error.