Thank you. :)
On Sat, Mar 15, 2014 at 1:45 PM, Gynvael Coldwind <gynv...@coldwind.pl>wrote: > Hey, > > I think the discussion digressed a little from the topic. Let's try to > steer it back on it. > > What would make this a security vulnerability is one of the three standard > outcomes: > > - information leak - i.e. leaking sensitive information that you normally > do not have access to > - remote code execution - in this case it would be: > -- XSS - i.e. executing attacker provided JS/etc code in another user's > browser, in the context *of a sensitive, non-sandboxed* domain (e.g. > youtube.com) > -- server-side code execution - i.e. executing attacker provided code on > the youtube servers > - denial of service - I think we all agree this bug doesn't increase the > chance of a DoS; since you upload files that fail to be processed (so the > CPU-consuming re-encoding is never run) I would argue that this decreases > the chance of DoS if anything > > Which leaves us with the aforementioned RCE. > > I think we all agree that if Mr. Lemonias presents a PoC that uses the > functionality he discovered to, either: > (A) display a standard XSS alert(document.domain) in a sensitive domain > (i.e. *.youtube.com or *.google.com, etc) for a different (test) user > OR > (B) execute code to fetch the standard /etc/passwd file from the youtube > server and send it to him, > then we will be convinced that this is vulnerability and will be satisfied > by the presented proof. > > I think that further discussion without this proof is not leading anywhere. > > > One more note - in the discussion I noticed some arguments were tried to > be justified or backed by saying "I am this this and that, and have this > many years of experience", e.g. (the first one I could find): > > "have worked for Lumension as a security consultant for more than a > decade." > > Please note, that neither experience, nor job title, proves exploitability > of a *potential* bug. Working exploits do. > > > That's it from me. I'm looking forward to seeing the RCE exploits (be it > client or server side). > > Kind regards, > Gynvael Coldwind > -- “There's a reason we separate military and the police: one fights the enemy of the state, the other serves and protects the people. When the military becomes both, then the enemies of the state tend to become the people.”
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