VNC Roulette

by dewey • 12 years ago

138 65 12 years ago

both Firefox and Chrome don't like the certificate if you hadn't already heard that, but otherwise this is a funny and good idea, and I'm having some fun tooling around wondering why these connections went unsecured and how many more are out there (lots and lots) that aren't listed yet

drzaiusapelord2• 12 years ago

Because VNC is a major clustfucker of bad ideas? Almost every VNC installer I've used has made passwords optional. Who makes these brain dead decisions? Its bad enough that it cannot, typically, integrate with the built-in OS authentication, but the "roll your own" mentality from devs is especially off-putting. Application devs shouldn't be writing authentication mechanisms. They should be tying to the OS's auth using the proper libraries.

If you must run VNC for legacy reasons, please run it in an SSH tunnel without an open port to the world.

With things like RDP, NX/nomachine, xwindows forwarding in an ssh tunnel, etc, there's really no excuse to keep using it. For all the shit Windows gets, at least it doesn't allowed password-free RDP connections. I think the world of cheap Linux VPS have opened up a pandora's box of bad security practices. There's no shortage of forums out there that tell the uninitiated to "just apt-get" VNC and be done with it. Running ssh tunneled nomachine is just as easy to configure, has better performance, and loads better security.

Also this looks like an applet that runs a js vnc client locally and connects you directly various open VNC servers. Its your IP address in those logs and depending on your jurisdiction or policies, may get you in trouble just for visiting the site. Took me a second to realize this. May want a warning here for those at work.

srsly-00016• 12 years ago

Also this looks like an applet that runs a js vnc client locally and connects you directly various open VNC servers. Its your IP address in those logs and depending on your jurisdiction or policies, may get you in trouble just for visiting the site. Took me a second to realize this. May want a warning here for those at work.

Not quite. The VNC client is noVNC, with a websocket proxy on the same machine http://srsly.de runs on. The connections you make with the web interface will go to our server, be translated from websockets to regular sockets, and then forwarded to the real VNC server. The address they see in their logs is ours.

We don't log access to the VNC client, by the way.

currysausage• 12 years ago

It's a self-signed certificate, so I'm pretty sure the person who runs this is well aware that it will produce in a warning in Firefox, Chrome, and about every other browser out there. ;)

ValdikSS3• 12 years ago

Damn, this is addicting

tyrelb• 12 years ago

love it!

mauz0r• 12 years ago

Lots of pun. The counter is going up quite fast, I wonder how long this wil be up.

ErikRogneby• 12 years ago

the counter was going down when I was flipping through. Folks must be flagging sites?

neals• 12 years ago

Ok, so how do I know my VNC is secure?

[edit] I don't have anything like VNC set-up, but maybe we (I) can learn something from this.

NDizzle• 12 years ago

Do you at least require a password?

elahd• 12 years ago

Minimally, require a password. This password would be separate from your Windows/Linux/OSX account password.

You could also use a non-standard port or configure some sort of port knocking system, or just close the VNC port to the outside world and allow connections over VPN or SSH tunnels only.

drzaiusapelord2• 12 years ago

Is it running through an SSH tunnel? If not, its not remotely secure.

Switch to NX instead.

deadfece• 12 years ago

Just an FYI here, but UltraVNC and RealVNC Enterprise do support VNC encryption.

http://adamwalling.com/SecureVNC/

https://www.realvnc.com/products/vnc/documentation/5.0/guide...

ultramancool• 12 years ago

To not appear on this list, just set a password.

To actually be secure: Bind only to localhost, tunnel over SSH, OpenVPN, etc.

reidrac• 12 years ago

I usually make it available on localhost and use an SSH tunnel to access to it. Nothing fancy, but effective.

Ecco• 12 years ago

I may be missing something obvious, but how does it find VNC servers?

cuu508• 12 years ago

masscan https://www.youtube.com/watch?v=UOWexFaRylM

srsly-00016• 12 years ago

We're using zmap to basically scan 0.0.0.0/0 on ports ranging from 5900 to 5910.

Adresses that have at least one of these open then get passed to a Python script that attempts to connect to those machines and take a screenshot.

The web frontend is built using Go httpd by the way.

Edit: We are able to do this because we're at the 31c3 with an enormeously fast internet connection. The machine this is running on has a 1Gbps connection to the internet.

ryan-c3• 12 years ago

Are you using the old RealVNC bug that allows the password to be bypassed by ignoring what authentication methods the server advertises and using "none", or only hitting stuff that actually says it supports connecting without a password?

aesthetics1• 12 years ago

I knew it was only a matter of time until I refreshed to someone watching YouPorn. NSFW, kids.

thesorrow• 12 years ago

It's down for me...

srsly-00016• 12 years ago

If that's the case, please retry. We're actively working on the backend of the site and restarting the application sometimes takes a second.

arianvanp2• 12 years ago

IANAL but connecting to any of these VNC's listened here is probably a felony . At least in the netherlands it probably is. Eventhough these are open to the public, the intention was probably to be private. Deliberately connecting to something that has the mere intention to be private is a felony here. [0]

[0] http://wetten.overheid.nl/BWBR0001854/TweedeBoek/TitelV/Arti...

srsly-00016• 12 years ago

You are probably right, at least in some jurisdictions. If in doubt, just use the web VNC client (click on the screenshot).

The web client uses our machine to proxy the websocket connection the client uses to the VNC server and we don't collect user data, especially not who used the VNC client to connect to which server.

ryan-c3• 12 years ago

A SSL certificate that doesn't help people get used to ignoring certificate errors can be had for free from StartSSL or for less than ten euros from a company that has a UI that won't make you want to cry.

arianvanp2• 12 years ago

I don't think "I used a proxy" will hold up in court though.

TheSpiceIsLife2• 12 years ago

That sort of feels like telling someone to wear gloves while they snoop around my house, or getting someone else to do it for them, and you thinking it's okay because we left a door unlocked.

What was that thing Warren Buffett wrote recently, with regard to moral decisions? "If anyone gives this explanation, tell them to try using it with a reporter or a judge and see how far it gets them."

Edit: a word

jmhobbs• 12 years ago

Wow. That is an aggressive law.

stinos• 12 years ago

Hmm, surely a lot of windows machines on there. Why would one put VNC on there? It's not exactly the best remote screen tool out there (had to use it often in the past unfotunately), or did I miss something? Just because it can be passwordless? Or because they don't know about RDP maybe?

halalfood• 12 years ago

my entire office uses vnc, reason is helpdesk sometimes needs to see what you're doing in order to help you. But you most definitely have to be on the network and we have a password, albeit very weak.

ansible• 12 years ago

The RDP server comes with Windows 7/8 Pro; home and other versions of Windows don't enable it.

RDP works a lot better in general, because you aren't limited to the screen resolution of the server system.

unbeli• 12 years ago

Most of them are not VNC on Windows, but Windows in QEMU, which provides VNC access to the console.

anonymfus• 12 years ago

Because most of PCs are windows machines.

p(windows|vnc)=p(vnc|windows) * p(windows) / ( p(vnc|windows) * p(windows) + p(vnc|non-windows) * p(non-windows) )

paralelogram• 12 years ago

It's not possible to use IBM SPSS Statistics over an RDP connection without paying for a multi-user license, even if there is only one connected user.

johnjreiser• 12 years ago

Surprised and saddened to see so many machines called "cloud".

Kenji• 12 years ago

https://srsly.de/hardlink/115.47.47.168-5909-vnc Wait, does Windows OS continue running in the background when you have a bluescreen, such that you can make a screenshot? I didn't know that.

ValdikSS3• 12 years ago

This is VNC is provided by QEMU, not OS.

supersheep3• 12 years ago

This feels unethical to me.

I've just seen a VNC session on a machine running some PLC software (I've flagged it). There could be god knows what running open VNC sessions in here, and it feels unethical to expose this in an easy-to-exploit way without making a best-efforts attempt to contact the operator.

I've seen a few VNC desktops that now have Paint open (or similar) with messages informing people that they have an open VNC server, but altruism is unlikely to be the norm.

It's a cool idea and it's really well done, but I do wish it was anonymised - no display of the host or port the VNC server is running on, just the screen. (I realise this might be useless in some cases where the screenshot lists the server's FQDN.)

ValdikSS3• 12 years ago

https://srsly.de/image?id=185.60.72.89-5900-vnc

BillFranklin• 12 years ago

Because it is unethical. Giving this ability to 100,000s of people (even for the short time before this site is taken down) is the wrong way to highlight the faults in VNC.

E.g. We should tell people that guns are dangerous, but we shouldn't highlight this by giving guns to children -- someone is going to get to hurt.

Alupis3• 12 years ago

This feels unethical to me.

Not really. The site operator has done nothing that has not already been done before, and it's little more than a basic nmap scan for services (which anyone can do).

It might be considered unethical that a PLC system is using VNC with no password.

There's also an awful lot of CirrOS systems in there, which tell you the default username and password, alongside a kind note saying the default user has full sudo privileges and you can just sudo into full root. The particularly bad thing about CirrOS is they are almost all running on OpenStack and other cloud providers, whom should know better.

supersheep3• 12 years ago

The site operator has done nothing that has not already been done before, and it's little more than a basic nmap scan for services (which anyone can do).

I realise this. Which is why I carefully phrased the objection as "easy-to-exploit". You and I may think the phrase "basic nmap scan" is simple, but it opens the door to lots of people who don't know what that sentence means but can easily click a link in their browser and be directly connected to an exploitable host (I don't like the phrase 'script kiddie' but I think that conveys what I mean).

It might be considered unethical that a PLC system is using VNC with no password.

It might. It might also be more properly called incompetence. But that's orthogonal to providing an easy way to exploit such a system and not notifying the operator, which I feel is "more unethical" if such a concept exists.

There are ways to do this if the intent was to highlight how many people run open VNC server (as I'm guessing is implied by calling the site Srsly?)

1) Don't publish the server's hostname and port.

2) Attempt to notify the operator.

3) Publish screenshots only.

By publishing the connection details, this turned something that could have been interesting and done some public good into something that I feel is dangerous and fairly exploitative.

cryptoz• 12 years ago

Not really. The site operator has done nothing that has not already been done before, and it's little more than a basic nmap scan for services (which anyone can do).

Merely because something is easy, or common, does not make it ethical. In fact, I think those factors should be entirety unrelated to ethics.

Theft has been done before. Theft is easy to do. Therefore, it's ethical to steal. This seems to be the logic you're following... Correct me if I'm wrong?

grkvlt• 12 years ago

Agree, one session had obviously just had 'rm -rf /' run on it. Now, if you leave a root shell open to the Internet you're kind of asking for it, but this is like posting a list of GPS locations of cars with the keys in the ignition up on a notice board for car thieves...

moyix• 12 years ago

It has already had good effects though. Noticing that lots of the VNC servers were named QEMU, someone has prodded the QEMU developers [1] to change the default when you use the -vnc option so that it does not listen on all interfaces by default.

[1] http://lists.nongnu.org/archive/html/qemu-devel/2014-12/msg0...

Volundr2• 12 years ago

Holy cow, the one I got was even nice enough to include the default username and password before the login prompt. I didn't test to see if it'd work :-p.

Edit: I've also seen several now with the root prompt already open. Now I know how so many botnets are formed.

dunham• 12 years ago

Maybe some of these vnc servers were put up after the machines were broken into, as a means of remote access for the attackers.

Volundr2• 12 years ago

Possibly, but several of them seem to be QEMU instances with VNC setup.

Alupis3• 12 years ago

No, he probably got one of the many CirrOS boxes, which tell you the username and password, alongside a kind note that the default user has full sudo privileges.

ryanmarsh• 12 years ago

Oh Jesus, I might be getting a visit from the feds soon...

mdewinter• 12 years ago

Is the database available somewhere? I can imagine that some providers want to scan for their ranges to inform their users. The following is time-consuming:

    $ while true; do curl -sk https://srsly.de | html2text | awk '/Address/ {print $2}' | tee -a vnsservers; done
    $ sort -u vncservers | wc -l
    3128

jwandborg• 12 years ago

Here's a dump of an Elasticsearch database with 7573 of them in it and whois information attached to each document: https://shining-inferno-2609.firebaseio.com/.json

Here's an `asn_country_code`-based aggregation of countries:

  {
    "took" : 2,
    "timed_out" : false,
    "_shards" : {
      "total" : 5,
      "successful" : 5,
      "failed" : 0
    },
    "hits" : {
      "total" : 7612,
      "max_score" : 0.0,
      "hits" : [ ]
    },
    "aggregations" : {
      "countries" : {
        "doc_count_error_upper_bound" : 5,
        "sum_other_doc_count" : 1894,
        "buckets" : [ {
          "key" : "cn",
          "doc_count" : 1891
        }, {
          "key" : "us",
          "doc_count" : 1155
        }, {
          "key" : "de",
          "doc_count" : 894
        }, {
          "key" : "kr",
          "doc_count" : 457
        }, {
          "key" : "ch",
          "doc_count" : 398
        }, {
          "key" : "mx",
          "doc_count" : 244
        }, {
          "key" : "ru",
          "doc_count" : 178
        }, {
          "key" : "ca",
          "doc_count" : 171
        }, {
          "key" : "it",
          "doc_count" : 167
        }, {
          "key" : "gb",
          "doc_count" : 163
        } ]
      }
    }
  }

funvit• 12 years ago

hmm. i see android device! omg!

david_shaw• 12 years ago

A few quick comments:

- First of all, I think the title of this submission might want to imply that it could be NSFW (see some comments below re: porn), and that it could be in a strange grey-area legally (especially if you actually connect to these machines)

- On one hand, there's nothing revelatory about this project. VNC, RDP, web cams, etc. are frequently found on the Internet because sysadmins don't secure them correctly. See something like Shodan, for example, to get a really realistic view of this.

On the other hand, though, bringing attention to it is a great way to get people to stop being idiots in this way.

Unfortunately, I doubt that the sysadmins in question will actually see this site.

Retr0spectrum2• 12 years ago

Lol: https://srsly.de/image?id=210.70.80.52-5901-vnc

Retr0spectrum2• 12 years ago

I saw loads of servers that looked like this: http://151.217.171.219:6080/vnc.html?autoconnect=true&token=...

They appear to be automated viewbots. I would have thought that there were more efficient ways of generating views.

kakashka• 12 years ago

Hello world!

VNC Roulette

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