- From: Adam Barth <w3c@adambarth.com>
- Date: Sat, 29 Jan 2011 13:49:30 -0800
- To: Gareth Heyes <gazheyes@gmail.com>
- Cc: "sird@rckc.at" <sird@rckc.at>, Devdatta Akhawe <dev.akhawe@gmail.com>, Michal Zalewski <lcamtuf@coredump.cx>, Brandon Sterne <bsterne@mozilla.com>, "public-web-security@w3.org" <public-web-security@w3.org>
If you have feedback on srcdoc, you might consider sending that feedback to the HTML WG. I don't believe anyone has implemented srcdoc yet, so improvements are likely easier to make now than they would be after folk start implementing. Adam On Sat, Jan 29, 2011 at 1:26 PM, Gareth Heyes <gazheyes@gmail.com> wrote: > Well have we not learnt anything, srcdoc takes over src and includes a unlimited amount of encoded html that renders, I can see why a lot of people thought it was a bad idea. > > I remember your attribute reader point but I didnt realize that attributes could be used for html. > > Sent from my secret lair > > On 29 Jan 2011, at 20:28, "sird@rckc.at" <sird@rckc.at> wrote: > >> If there's srcdoc and src, then srcdoc takes precedence. >> >> I do agree seamless iframes are kinda shady, and, for example, are >> useful for CSS attribute reading, but well.. there was a thread about >> this before. >> >> Greetings >> -- Eduardo >> >> >> >> >> On Sat, Jan 29, 2011 at 3:18 AM, gaz Heyes <gazheyes@gmail.com> wrote: >>> Haha this is hilarious if seamless iframes are allowed in seamless iframes >>> we have a HTML inception vector :D >>> >>> <iframe sandbox=allow-same-origin seamless=seamless >>> srcdoc="<iframe sandbox=allow-same-origin seamless=seamless srcdoc='&#60;&#105;&#102;&#114;&#97;&#109;&#101;&#32;&#115;&#97;&#110;&#100;&#98;&#111;&#120;&#61;&#97;&#108;&#108;&#111;&#119;&#45;&#115;&#97;&#109;&#101;&#45;&#111;&#114;&#105;&#103;&#105;&#110;&#32;&#115;&#101;&#97;&#109;&#108;&#101;&#115;&#115;&#61;&#115;&#101;&#97;&#109;&#108;&#101;&#115;&#115;&#32;&#115;&#114;&#99;&#100;&#111;&#99;&#61;&#84;&#105;&#109;&#101;&#95;&#105;&#115;&#95;&#115;&#108;&#111;&#119;&#101;&#114;&#95;&#104;&#101;&#114;&#101;&#62;&#60;&#47;&#105;&#102;&#114;&#97;&#109;&#101;&#62;'></iframe>"></iframe> >>> >>> What would be interesting is what happens when there's src and srcdoc, >>> because if we find an injection in src attribute we can inject this. >>> >>> On 28 January 2011 17:55, sird@rckc.at <sird@rckc.at> wrote: >>>> >>>> Hey! >>>> >>>> So, yes that's correct :P but you obviously html entify stuff inside >>>> the attribute. >>>> >>>> <iframe sandbox seamless srcdoc="<?php echo >>>> >>>> strtr($user_input,Array("&"=>"&","\""=>""","<"=>"<",">"=>">")); >>>> ?>"> >>>> >>>> >>>> -- Eduardo >>>> >>>> >>>> >>>> >>>> On Fri, Jan 28, 2011 at 11:16 AM, gaz Heyes <gazheyes@gmail.com> wrote: >>>>> On 28 January 2011 16:56, sird@rckc.at <sird@rckc.at> wrote: >>>>>> >>>>>> Hi! >>>>>> >>>>>> The attribute "seamless" will do: >>>>>> >>>>>> 1. If you have b{color:blue} in the doc >>>>>> 2. You have: >>>>>> <iframe sandbox="allow-same-origin" seamless="seamless" >>>>>> srcdoc="<b>xD</b>"></iframe> >>>>>> 3. You get, a blue bold "xD". >>>>> >>>>> So it puts HTML content inside an attribute! How would it handle >>>>> entities? I >>>>> mean if an attribute is rendering as HTML then does ' become '? Who >>>>> thought putting HTML in attributes was a good idea? Does that mean stuff >>>>> like <a href=javascript&#58;alert(1)>test</a> I like the idea of >>>>> externally included sandboxed HTML but not inline. >>>>> >>> >>> >
Received on Saturday, 29 January 2011 21:50:35 UTC