- From: <sird@rckc.at>
- Date: Sat, 29 Jan 2011 14:28:41 -0600
- To: gaz Heyes <gazheyes@gmail.com>
- Cc: Adam Barth <w3c@adambarth.com>, Devdatta Akhawe <dev.akhawe@gmail.com>, Michal Zalewski <lcamtuf@coredump.cx>, Brandon Sterne <bsterne@mozilla.com>, public-web-security@w3.org
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 20:29:34 UTC