3:48 p.m.
I know you have more experiences at this stage than me.
I don't worry about hacking the phone. But somewhere the QRCode has to be
generated. It is often done with things lik jquery.qrcode(uri). The uri has
to be retrieved from the backend to be able to generate the qrcode.
I could assume an attack at the qrcode generation stage, due to the fact
that this is done in javascript.
So the risk is not the phone, it is the browser where the qrcode will be
displayed.
wdyt? :)
2012/12/18 Bruno Oliveira <bruno(a)abstractj.org>
I'm just trying to understand, the shared secret **can never** be
sent
across the network, in our case that's the reason why you must scan the
QRCode to generate tokens, exactly to do not transmit it across the network.
So XSS attacks can decode an image and grab my secret? I'm interested in
reproduce this kind of attack, do you have the sources?
I didn't say nothing about contributions, I'm just curious about how you
could hack mobile's phone camera. I'd love to learn.
--
"The measure of a man is what he does with power" - Plato
-
@abstractj
-
Volenti Nihil Difficile
On Tuesday, December 18, 2012 at 6:48 PM, Daniel Manzke wrote:
> The man-in-the-middle could be between your web client and server. You
have to call the server and than generate it. With XSS-Attacks there are a
lot of ways to read the qrcode.
> This means the secret is exposed and you can generate a valid token. ;)
>
> If you don't want the contribution I'm going to fork and have my own
version of aerogear-otp-java. No problem. ;)
>
>
> 2012/12/18 Bruno Oliveira <bruno(a)abstractj.org (mailto:
bruno(a)abstractj.org)>
> > Sorry Daniel, but I can't see how someone can intercept your phone's
camera while you're scanning the QRCode, doesn't exist any communication
between the client and the server. That's the reason why QRCode exists.
> >
> > Here you can check more about how it works
http://aerogear.org/docs/specs/aerogear-security-otp/. IMO the idea of
input a PIN, sounds more like a HOTP, because it relies in some event to
happen to have a new token. Add a large delay window like 60s will expose
you to the man-in-the-middle attacks, allowing to reuse your token.
> >
> >
> > --
> > "The measure of a man is what he does with power" - Plato
> > -
> > @abstractj
> > -
> > Volenti Nihil Difficile
> >
> >
> >
> > On Tuesday, December 18, 2012 at 3:09 PM, Daniel Manzke wrote:
> >
> > > With TOTP you have to share a secret. This secret will be shared
with the help of a link or qrcode. This can be catched by a man in the
middle attack
> >
> >
> >
> > _______________________________________________
> > aerogear-dev mailing list
> > aerogear-dev(a)lists.jboss.org (mailto:aerogear-dev@lists.jboss.org)
> > https://lists.jboss.org/mailman/listinfo/aerogear-dev
>
>
>
>
> --
> Viele Grüße/Best Regards
>
> Daniel Manzke
> _______________________________________________
> aerogear-dev mailing list
> aerogear-dev(a)lists.jboss.org (mailto:aerogear-dev@lists.jboss.org)
> https://lists.jboss.org/mailman/listinfo/aerogear-dev
_______________________________________________
aerogear-dev mailing list
aerogear-dev(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/aerogear-dev
--
Viele Grüße/Best Regards
Daniel Manzke