Re: Security-Assessment.com Advisory: Oracle JRE - java.net.URLConnection class - Same-of-Origin (SOP) Policy Bypass

[Chris Evans <scarybeasts () gmail com>]

On Wed, Oct 20, 2010 at 8:58 AM, Michal Zalewski <lcamtuf () coredump cx>wrote:

> > Security-Assessment.com follows responsible disclosure
> > and promptly contacted Oracle after discovering
> > the issue. Oracle was contacted on August 1,
> > 2010.
>
> My understanding is that Stefano Di Paola of Minded Security reported
> this back in April; and further, the feature was a part of reasonably
> well-documented functionality of Java pretty much ever since:
>
> http://download.oracle.com/javase/6/docs/api/java/net/URL.html


The Host: header trick was also used back in 2008 in Billy Rios' GIFAR
attack -- to get around the fact that Picasa hosts images on a separate
domain:

http://xs-sniper.com/blog/2008/12/17/sun-fixes-gifars/

The blog post title was "SUN Fixes GIFARs", although it's not immediately
obvious to me what was changed or fixed.

If anyone knows what was changed back then and/or in this latest release, it
would be interesting to see it documented.


Cheers
Chris


> "Two hosts are considered equivalent if both host names can be
> resolved into the same IP addresses"
>
> This was a pretty horrible design, so it's good to see it gone, though.
>
> /mz
>
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