Full Disclosure mailing list archives
Re: Fwd: Google vulnerabilities with PoC
From: "Nicholas Lemonias." <lem.nikolas () googlemail com>
Date: Sat, 15 Mar 2014 05:11:31 +0000
Correct. The mime type can be circumvented. We can confirm this to be a valid vulnerability. For the PoC's : http://news.softpedia.com/news/Expert-Finds-File-Upload-Vulnerability-in-YouTube-Google-Denies-It-s-a-Security-Issue-431489.shtml On Fri, Mar 14, 2014 at 8:40 PM, Krzysztof Kotowicz <kkotowicz+fd () gmail com>wrote:
2014-03-14 20:28 GMT+01:00 Nicholas Lemonias. <lem.nikolas () googlemail com> : Then that also means that firewalls and IPS systems are worthless. Whyspend so much time protecting the network layers if a user can send any file of choice to a remote network through http...No, they are not worthless per se, but of course for an user content publishing service they need to allow file upload over HTTP/s. How far those files are inspected and later processed is another question - and that could lead to a vulnerability that you DIDN'T demonstrate. You just uploaded a .sh file. There's no harm in that as nowhere did you prove that that file is being executed. Similarly (and that has been pointed out in this thread) you could upload a PHP-GIF polyglot file to a J2EE application - no vulnerability in this. Prove something by overwriting a crucial file, tricking other user's browser to execute the file as HTML from an interesting domain (XSS), popping a shell, triggering XXE when the file is processed as XML, anything. Then that is a vulnerability. So far - sorry, it is not, and you've been told it repeatedly. As for the uploaded files being persistent, there is evidence of that.For instance a remote admin could be tricked to execute some of the uploaded files (Social Engineering).Come on, seriously? Social Engineering can make him download this file from pastebin just as well. That's a real stretch. IMHO it is not a security issue. You're uploading a file to some kind of processing queue that does not validate a file type, but nevertheless only processes those files as video - there is NO reason to suspect otherwise, and I'd like to be proven wrong here. Proven as in PoC.
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Current thread:
- Re: Fwd: Google vulnerabilities with PoC, (continued)
- Re: Fwd: Google vulnerabilities with PoC Nicholas Lemonias. (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Nicholas Lemonias. (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC R D (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Nicholas Lemonias. (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Mario Vilas (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Julius Kivimäki (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Nicholas Lemonias. (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Krzysztof Kotowicz (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Michal Zalewski (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Nicholas Lemonias. (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Nicholas Lemonias. (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Mario Vilas (Mar 15)
- Re: Fwd: Google vulnerabilities with PoC Colette Chamberland (Mar 15)
- Re: Fwd: Google vulnerabilities with PoC Nicholas Lemonias. (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC David H (Mar 15)
- Re: Fwd: Google vulnerabilities with PoC antisnatchor (Mar 15)
- Re: Fwd: Google vulnerabilities with PoC Mario Vilas (Mar 15)
- Re: Fwd: Google vulnerabilities with PoC R D (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Nicholas Lemonias. (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Yvan Janssens (Mar 14)
- Re: Fwd: Google vulnerabilities with PoC Colette Chamberland (Mar 15)