Re: [XHR] XMLHttpRequest specification lacks security considerations

On Mon, 08 Feb 2010 18:01:18 +0100, Julian Reschke <>  
> Is re-binding == spoofing? Does  
> <> help,  
> or does nit need to be updated (Thomas; HTTPbis will gladly accept your  
> input ;-).

As far as I can tell DNS rebinding is possible because clients observe TTL  
and can be prevented by servers carefully checking the Host header. The  
solutions clients can employ have potential drawbacks:

I.e. it seems to be something different.

> HTML5 defines when two origins are the same, but it's remarkably silent  
> about the so-called "same-origin policy". The information may be there,  
> but it#s not obvious where it is.

I think you are right in that it does not actually explain what it is. You  
filed a bug on the matter so hopefully it gets resolved in due course.

Anne van Kesteren

Received on Monday, 8 February 2010 17:14:58 UTC