On Tue, Apr 25, 2017 at 3:40 PM, Salvador de la Puente <
[email protected]> wrote:

> The article says:
>
> Embed an image from the attacked domain; generally this will be a resource
> > which varies for different authenticated users such as the logged-in
> user’s
> > avatar or a security code.
> >
>
> And then refers all the steps to this image (binarizing, expand and measure
> per pixel) but, If I can embed that image, it is because I know the URL for
> it and the proper auth tokens if it is protected. In that case, why to not
> simply steal the image?
>

The simple version of this is that the image is cookie protected.

-Ekr


> On Wed, Apr 26, 2017 at 12:23 AM, Jonathan Kingston <[email protected]>
> wrote:
>
> > Auth related images are the attack vector, that and history attacks on
> > same domain.
> >
> > On Tue, Apr 25, 2017 at 11:17 PM, Salvador de la Puente <
> > [email protected]> wrote:
> >
> >> Sorry for my ignorance but, in the case of Stealing cross-origin
> >> resources,
> >> I don't get the point of the attack. If have the ability to embed the
> >> image
> >> in step 1, why to not simply send this to evil.com for further
> >> processing?
> >> How it is possible for evil.com to get access to protected resources?
> >>
> >> On Tue, Apr 25, 2017 at 8:04 PM, Ehsan Akhgari <[email protected]
> >
> >> wrote:
> >>
> >> > On 04/25/2017 10:25 AM, Andrew Overholt wrote:
> >> >
> >> >> On Tue, Apr 25, 2017 at 9:35 AM, Eric Rescorla <[email protected]> wrote:
> >> >>
> >> >> Going back to Jonathan's (I think) question. Does anyone use this at
> >> all
> >> >>> in
> >> >>> the field?
> >> >>>
> >> >>> Chrome's usage metrics say <= 0.0001% of page loads:
> >> >> https://www.chromestatus.com/metrics/feature/popularity#Ambi
> >> >> entLightSensorConstructor.
> >> >>
> >> >
> >> > This is the new version of the spec which we don't ship.
> >> >
> >> >
> >> > We are going to collect telemetry in
> >> >> https://bugzilla.mozilla.org/show_bug.cgi?id=1359124.
> >> >> _______________________________________________
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> >> >> https://lists.mozilla.org/listinfo/dev-platform
> >> >>
> >> >
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> >> >
> >>
> >>
> >>
> >> --
> >> <salva />
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> >
> >
>
>
> --
> <salva />
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