full-disclosure - Re: Google vulnerabilities with PoC

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Message-Id: <6AF4845E-6FFC-47FB-B12E-7BCBB62467F7@gmail.com>
Date: Thu, 13 Mar 2014 13:16:00 -0500
From: Brandon Perry <bperry.volatile@...il.com>
To: Źmicier Januszkiewicz <gauri@....by>
Cc: full-disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: Google vulnerabilities with PoC

Yes, these are legitimate points.

Sent from a computer

> On Mar 13, 2014, at 12:43 PM, Źmicier Januszkiewicz <gauri@....by> wrote:
> 
> : you could upload huge blobs and just take up space on the google servers.
> How many people upload gigabytes of crappy videos on google servers,
> hourly? So far, the DDoS didn't happen for some reason, even
> considering the amount of users. There is a small potential to exploit
> this via a botnet, but what's the gain? YT upload breaks? Wow, so much
> win.
> 
> By the way, why not just upload some valid, generated on the fly MPEG
> stream? The effect is the same if you consider the data amount, but
> without all the "unrestricted" shouts and academic vulnerabilities.
> 
> 
> 2014-03-13 18:33 GMT+01:00 Brandon Perry <bperry.volatile@...il.com>:
>> If you were evil, you could upload huge blobs and just take up space on the google servers. Who knows what will happen if you upload a couple hundred gigs of files. They dont disappear, they are just unretrievable afaict. It is a security risk in the sense that untrusted data is being persisted *somewhere*.
>> 
>> Upload a couple terabytes, cause a DoS because some hdd in the DC fills up. Who knows.
>> 
>> Sent from a computer
>> 
>> On Mar 13, 2014, at 12:28 PM, Michal Zalewski <lcamtuf@...edump.cx> wrote:
>> 
>>>> The only reasonable way to 'exploit' the bug is using youtube as a
>>>> "personal storage" uploading non-video files to your own profile: so what?
>>> 
>>> That would require a way to retrieve the stored data, which - as I
>>> understand - isn't possible here (although the report seems a bit
>>> hard-to-parse). From what I recall, you can just upload a blob of data
>>> and essentially see it disappear.
>>> 
>>> We do have quite a few services where you can legitimately upload and
>>> share nearly-arbitrary content, though. Google Drive is a good
>>> example.
>>> 
>>> /mz
>>> 
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Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
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