Re: VNC viewers: Clipboard of host automatically sent to remote machine

[Christian Sciberras <uuf6429 () gmail com>]

For the record...
who are the other 'many on this list' that know you don't troll other than
your alter egos?
'course you don't troll.... can you quote me where I ever said VNC is
secure?

With that, I'll let you troll in peace. I have no interest talking to you
anyway... :)



On Wed, Jan 25, 2012 at 12:04 PM, GloW - XD <doomxd () gmail com> wrote:

> and stupidly, you forgot to addin the second PRIVT post i sent you,
> saying i meant *insecure :)
> now, go try tell me windows vnc is secure again...and, then setup a
> vnc on your box, and, under win32, try your best, when your ready,
> yell out, so i can make a compete fucking fool of ya.
> ok ?
> if this is how you want to play, i am challenging you, if i can own a
> shitty windows setup you 'secure' as best you8 can, here on fd, is
> this trolling is it ?
> its a challenge... maybe, if you read the lame rfb and, pixelisation
> via IP KVM, unfortunately for windows, it aint any different, a pixel
> is placed at X or Y, and, you can place data calls to it, from server
> wich, could be, my bot :)
> want more proof,...keep going with my challenge then.
>
>
> On 25 January 2012 21:38, Christian Sciberras <uuf6429 () gmail com> wrote:
> > No, I only read the manual.
> >
> > Now go troll somwhere else. :)
> >
> > On Wed, Jan 25, 2012 at 11:35 AM, GloW - XD <doomxd () gmail com> wrote:
> > > Windows is even more secure, have you actually, read any of the code /
> > >
> > >
> > > On 25 January 2012 21:30, Christian Sciberras <uuf6429 () gmail com>
> wrote:
> > > > That's not necessarily true. On windows you can add custom
> > > > clipboard formats
> > > > that would contain a 'link' to the original source, causing the data
> > > > to be
> > > > actually
> > > > passed when pasting. An example of this is when one copy+pastes a
> file.
> > > > See the Windows Clipboard API for more info.
> > > >
> > > > Chris.
> > > >
> > > >
> > > >
> > > > On Wed, Jan 25, 2012 at 10:54 AM, Mario Vilas <mvilas () gmail com>
> wrote:
> > > > > I'm not sure how the clipboard works in Linux desktops (I understand
> > > > > it's a little different), but at least in Windows environments data
> > > > > has to be copied to the clipboard when you hit Ctrl-C. It can't be
> > > > > copied when you hit Ctrl-V because then the applications wouldn't
> know
> > > > > if there is anything to paste (like you said, the button would be
> > > > > grayed).
> > > > >
> > > > > So to replicate this behavior it's necessary to send the data as it's
> > > > > copied, not as it's pasted. Most (not all, but most) desktop systems
> > > > > assume clipboard data can be freely shared with all applications and
> > > > > don't have any kind of isolation at all. VNC was designed with the
> > > > > same idea.
> > > > >
> > > > > The bottom line is, the problem here is using VNC for what Ben is
> > > > > using it. There are many more problems with that scenario and
> > > > > clipboard sharing may be the least of them.
> > > > >
> > > > > On Wed, Jan 25, 2012 at 8:44 AM, Peter Osterberg <j () vel nu> wrote:
> > > > > > On 01/24/2012 07:18 PM, Mario Vilas wrote:
> > > > > > > > Guys, could you please read carefully everything before you
> reply?
> > > > > > > I read carefully. It still didn't make sense, though.
> > > > > > >
> > > > > > > > And you wouldn't be allowed to use copy&paste while you edit
> > > > > > > > sensitive
> > > > > > > > documents either, I guess?
> > > > > > > I don't know how you could get to such a conclusion from what I
> > > > > > > wrote.
> > > > > > >
> > > > > > > You're reporting that if you copy and paste sensitive information
> > > > > > > and
> > > > > > > connect to a VNC session your clipboard data gets sent to the
> remote
> > > > > > > machine. That's pretty obvious and not a security hole that needs
> to
> > > > > > > be plugged.
> > > > > >
> > > > > > I don't think that is what Ben is saying. The clipboard get sent to
> > > > > > the
> > > > > > the server even before it is pasted, this happens without the user
> > > > > > knowing of it.
> > > > > >
> > > > > > Notepad would have the paste button grayed otherwise, if the
> > > > > > clipboard
> > > > > > is empty, right? So it is already on the server before paste is
> > > > > > pressed.
> > > > > >
> > > > > > So what ever was in the clipboard buffer is transmitted to the
> server
> > > > > > on
> > > > > > connection.
> > > > > >
> > > > > > This is at least the assumption I make from reading Ben's mails.
> > > > > > Or...
> > > > > > Is there a cliboard flag saying there is something on the
> clipboard,
> > > > > > but
> > > > > > it isn't transmitted until the user actually pastes? I haven't
> really
> > > > > > got any experience with how the clipboard feature is implemented.
> My
> > > > > > assumption is however that it has to be on server for notepad to be
> > > > > > aware that Paste shouldn't be grayed out...
> > > > > >
> > > > > > I think Ben's report make complete sense actually, it would be
> better
> > > > > > to
> > > > > > have the clipboard feature as a default. Security before
> features...
> > > > > > =)
> > > > > >
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