Message-ID: <CAAiDhw3c2BQMgyPTGeUw+5MgzMdf_7SM5ru-FdCPiYr3s3V5ug@mail.gmail.com>
Date: Fri, 14 Mar 2014 21:50:23 -0500
From: William Scott Lockwood III <scott@...pylog.com>
To: "Nicholas Lemonias." <lem.nikolas@...glemail.com>
Cc: full-disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: Fwd: Google vulnerabilities with PoC

It's amazing how much dumber I feel for having read your drivel.
Please for the love of <$diety> stop posting to this list.

--
W. Scott Lockwood III
AMST Tech (SPI)
GWB2009033817
http://www.shadowplayinternational.org/
"There are four boxes to be used in defense of liberty:  soap, ballot,
jury, and ammo. Please use in that order." -Ed Howdershelt (Author)


On Fri, Mar 14, 2014 at 9:48 PM, Nicholas Lemonias.
<lem.nikolas@...glemail.com> wrote:
> Go to sleep. You have absolutely no understanding of the vulnerability, nor
> you have the facts.
>
> If you want a full report ask Softpedia, because we aint releasing them.
>
>
> On Fri, Mar 14, 2014 at 8:39 PM, R D <rd.seclists@...il.com> wrote:
>>
>> >You are trying to execute an sh script through a video player. That's an
>> > exec() command.
>> No, it's not. That's an HTTP GET. Do you have such a poor understanding of
>> how web applications work? Or did you just not read what I said?
>>
>> >So its the wrong way about accessing the file.
>> This way, which is the standard way to access files on youtube, tells me
>> the file doesn't exist. You have yet to prove the file you uploaded can be
>> accessed or executed by anyone. For that matter, you have still to prove it
>> can be discovered by anyone. That URL is hard to guess.
>> And you have still to answer all my other questions, and most of the
>> questions asked to you on this list.
>> The burden of proof is on you, and you are making a fool of yourself by
>> answering all the questions here with the same statements, and links to your
>> PoC that doesn't proves anything, while everybody asks you for more
>> evidence.
>> Keep on the (good?) work,
>> --Rob'
>>
>>
>> On Fri, Mar 14, 2014 at 9:22 PM, Nicholas Lemonias.
>> <lem.nikolas@...glemail.com> wrote:
>>>
>>> You are trying to execute an sh script through a video player. That's an
>>> exec() command. So its the wrong way about accessing the file.
>>>
>>>
>>> On Fri, Mar 14, 2014 at 8:20 PM, R D <rd.seclists@...il.com> wrote:
>>>>
>>>> No it's not. As Chris and I are saying, you don't have proof your file
>>>> is accessible to others, only that is was uploaded. Now, you see, when you
>>>> upload a video to youtube, you get the adress where it will be viewable in
>>>> the response. In your case :
>>>>
>>>> {"sessionStatus":{"state":"FINALIZED","externalFieldTransfers":[{"name":"file","status":"COMPLETED","bytesTransferred":113,"bytesTotal":113,"formPostInfo":{"url":"http://www.youtube.com/upload/rupio?authuser=0\u0026upload_id=AEnB2UqVZlaog3GremriQEGDoUK3cdGGPu9MVIfyObgYajjo6i1--uQicn6jhbwsdNrqSF4ApbUbhCcwzdwe4xf_XTbL_t5-aw\u0026file_id=000","cross_domain_url":"http://upload.youtube.com/?authuser=0\u0026upload_id=AEnB2UqVZlaog3GremriQEGDoUK3cdGGPu9MVIfyObgYajjo6i1--uQicn6jhbwsdNrqSF4ApbUbhCcwzdwe4xf_XTbL_t5-aw\u0026origin=CiNodHRwOi8vd3d3LnlvdXR1YmUuY29tL3VwbG9hZC9ydXBpbxINdmlkZW8tdXBsb2Fkcw"},"content_type":"text/x-sh"}],"additionalInfo":{"uploader_service.GoogleRupioAdditionalInfo":{"completionInfo":{"status":"SUCCESS","customerSpecificInfo":{"status":
>>>> "ok", "video_id":
>>>> "KzKDtijwHFI"}}}},"upload_id":"AEnB2UqVZlaog3GremriQEGDoUK3cdGGPu9MVIfyObgYajjo6i1--uQicn6jhbwsdNrqSF4ApbUbhCcwzdwe4xf_XTbL_t5-aw"}}
>>>> And what do we get when we browse to
>>>> https://youtube.com/watch?v=KzKDtijwHFI ?
>>>> Nothing.
>>>> Can you send me a link where I can access the file content of the
>>>> arbitrary file you uploaded?
>>>> Are you sure this json response, or this file, will be there in a month?
>>>> Or in a year? Is the fact that this json response exists a threat to
>>>> youtube? Can you quantify how of a threat? How much, in dollars, does it
>>>> hurt their business?
>>>>
>>>> --Rob
>>>>
>>>>
>>>> On Fri, Mar 14, 2014 at 9:08 PM, Nicholas Lemonias.
>>>> <lem.nikolas@...glemail.com> wrote:
>>>>>
>>>>> My claim is now verified....
>>>>>
>>>>> Cheers!
>>>>>
>>>>>
>>>>> On Fri, Mar 14, 2014 at 8:04 PM, Nicholas Lemonias.
>>>>> <lem.nikolas@...glemail.com> wrote:
>>>>>>
>>>>>>
>>>>>> http://upload.youtube.com/?authuser=0&upload_id=AEnB2UqVZlaog3GremriQEGDoUK3cdGGPu9MVIfyObgYajjo6i1--uQicn6jhbwsdNrqSF4ApbUbhCcwzdwe4xf_XTbL_t5-aw&origin=CiNodHRwOi8vd3d3LnlvdXR1YmUuY29tL3VwbG9hZC9ydXBpbxINdmlkZW8tdXBsb2Fkcw
>>>>>>
>>>>>> That information can be queried from the db, where the metadata are
>>>>>> saved. The files are being saved persistently , as per the above example.
>>>>>>
>>>>>>
>>>>>> On Fri, Mar 14, 2014 at 8:04 PM, Nicholas Lemonias.
>>>>>> <lem.nikolas@...glemail.com> wrote:
>>>>>>>
>>>>>>>
>>>>>>> http://upload.youtube.com/?authuser=0&upload_id=AEnB2UqVZlaog3GremriQEGDoUK3cdGGPu9MVIfyObgYajjo6i1--uQicn6jhbwsdNrqSF4ApbUbhCcwzdwe4xf_XTbL_t5-aw&origin=CiNodHRwOi8vd3d3LnlvdXR1YmUuY29tL3VwbG9hZC9ydXBpbxINdmlkZW8tdXBsb2Fkcw
>>>>>>>
>>>>>>> That information can be queried from the db, where the metadata are
>>>>>>> saved. The files are being saved persistently , as per the above example.
>>>>>>>
>>>>>>>
>>>>>>> On Fri, Mar 14, 2014 at 8:00 PM, Chris Thompson
>>>>>>> <christhom7851@...il.com> wrote:
>>>>>>>>
>>>>>>>> Hi Nikolas,
>>>>>>>>
>>>>>>>> Please do read (and understand) my entire email before responding -
>>>>>>>> I understand your frustration trying to get your message across but maybe
>>>>>>>> this will help.
>>>>>>>>
>>>>>>>> Please put aside professional pride for the time being - I know how
>>>>>>>> it feels to be passionate about something yet have others simply not
>>>>>>>> understand.
>>>>>>>>
>>>>>>>> Let me try and bring some sanity to the discussion and explain to
>>>>>>>> you why people maybe not agreeing with you.
>>>>>>>>
>>>>>>>> You (rightly so) highlighted what you believe to be an issue in a
>>>>>>>> Youtube whereby it appears (to you) than you can upload an arbitrary file.
>>>>>>>> If you can indeed do this as you suspect then your points are valid and you
>>>>>>>> "may" be able to cause various issues associated with it such as DOS etc -
>>>>>>>> especially if the uploaded files cannot or are not tracked.
>>>>>>>>
>>>>>>>> However...
>>>>>>>>
>>>>>>>> Consider than you are talking to an API and what you are getting
>>>>>>>> back (the JSON response) in your example is simply a response from the API
>>>>>>>> to say the file you uploaded has been received and saved.
>>>>>>>>
>>>>>>>> Now, as you no doubt know, when you upload a regular movie to
>>>>>>>> YouTube, once uploaded it goes away and does some post-processing,
>>>>>>>> converting it to flash for example. What's to say that there isn't some
>>>>>>>> verification aspect to this post-processing that checks if the file is
>>>>>>>> intact a valid movie and if not removes it.
>>>>>>>>
>>>>>>>> If you could for example demonstrate that the file was indeed
>>>>>>>> persistent, by being able to retrieve it for example then again, you would
>>>>>>>> have solid ground to claim an issue however your claims at this point are
>>>>>>>> based on an assumption.... Let me explain.
>>>>>>>>
>>>>>>>> 1. You have demonstrated than you can send "any" file to an API and
>>>>>>>> the API returned an acknowledgment of receiving (and saving) the file.
>>>>>>>>
>>>>>>>> 2. You / we don't know what Google do with files once they have been
>>>>>>>> received from the API - maybe they process them and validate them - we
>>>>>>>> simply don't know.
>>>>>>>>
>>>>>>>> 3. You have hypothesized that you can retrieve the file by
>>>>>>>> manipulating tokens etc and you may be right, but you have not demonstrated
>>>>>>>> it as such.
>>>>>>>>
>>>>>>>> Because of this, you seem to have made a CLAIM that you can upload
>>>>>>>> arbitrary files to Google however SHOWN that you can simply send files to an
>>>>>>>> API and an API responds in a certain way.
>>>>>>>>
>>>>>>>> I am NOT saying you haven't found an issue, what I am saying is that
>>>>>>>> you need to demonstrate that the issue is real and thus can be abused. If
>>>>>>>> the Google service simply verifies all uploaded files once they are uploaded
>>>>>>>> and discards them if invalid, then you haven't really found anything.
>>>>>>>>
>>>>>>>> If you were to prove that you were able to retrieve this uploaded
>>>>>>>> file then how could anyone dispute your bug.
>>>>>>>>
>>>>>>>> Hope this helps....
>>>>>>>>
>>>>>>>> Cheers!
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>
>>>>
>>>
>>
>
>
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
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