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The New York Times uses WebRTC to gather local IP addresses

webrtchacks.com

31–40 of 128 posts

Re: The New York Times uses WebRTC to gather local IP addresses

#31
post #21

Just a friendly reminder for anyone using uBlock Origin on Chrome or Firefox that you can now configure it to prevent webRTC from leaking your real IP: http://www.ghacks.net/2015/07/02/you-can-block-webrtc-from-l... You do need to enable this. After reading the article I immediately checked by dashboard and saw that the option was available, but unchecked.

I'm surprised that isn't enabled by default. I hope that the developer changes that in the future.

Presumably it breaks stuff.

Re: The New York Times uses WebRTC to gather local IP addresses

#32

Ironic that loading up this site, webrtchacks.com, Tor Browser warns me: "Should Tor browser allow this website to extract HTML5 canvas image data?" I've now given up on "naked" browsing of the web and only surf via the Tor Browser Bundle. I use a standard Firefox only for web development.

Are the rest of us who don't use Tor going to have our lives ruined? Certain data such as social security numbers and bank passwords are obviously critical, but I wonder what drives this seemingly excessive paranoia. For example, who cares about your IP address in general purpose web situations? Obviously if you're doing sql scans or pentesting obscuring your location is extremely important, but I'm not convinced of…

For me it's more about the fact that companies are collecting too much data and not anonymizing it properly or securing it properly. I doubt Walmart, or whomever is going to do much more than send me annoying emails or postal mail at worst.

What I'm more concerned about is things like criminals obtaining the info and realizing my personal machine might be a good target for some reason. Or some company selling the data, which eventually gets to a healthcare company that is able to connect my browser history to my name and start denying me coverage or marking me as "potentially high risk" because I looked up the wrong thing, or things like that.

I haven't gone as far as using Tor, but I block cookies from 3rd parties, use ad blockers and browse entirely in private mode until I'm forced not to by some lame web site. After I'm done, I delete as many tracking things as I can and turn private mode back on.

Re: The New York Times uses WebRTC to gather local IP addresses

#33
post #23

Just a friendly reminder for anyone using uBlock Origin on Chrome or Firefox that you can now configure it to prevent webRTC from leaking your real IP: http://www.ghacks.net/2015/07/02/you-can-block-webrtc-from-l... You do need to enable this. After reading the article I immediately checked by dashboard and saw that the option was available, but unchecked.

After enabling it I keep seeing my public address here. https://diafygi.github.io/webrtc-ips/ — What gives?

That is odd... for me (Firefox on Windows), enabling that option completely removes the `RTCPeerConnection` property from the global object, and any script that tries to use it fails with `TypeError: RTCPeerConnection is not a constructor`.

Re: The New York Times uses WebRTC to gather local IP addresses

#36
post #22

Forum post from Dan Kaminsky, co-founder of WhiteOps[1][2]: "Dan Kaminsky here, my apologies for kicking up a ruckus. This is part of a bot detection framework I've built at White Ops; we basically are able to detect browser automation using resources exposed in JavaScript. Nothing dangerous to users -- or we'd go file bugs on it, which we do from time to time -- but it does provide useful data regarding post-exploit…

Additionally, the STUN attempts are supposedly gone since yesterday:

https://github.com/EFForg/privacybadgerchrome/issues/431#iss...

Re: The New York Times uses WebRTC to gather local IP addresses

#37
post #15

Earlier quoted context omitted.

Don't forget Flash, the #1 tool for persistent tracking. Uninstalling Flash should be your first priority if you care about this.

Look into browser fingerprinting, among other things. This is a losing battle. I am deeply pessimistic about the potential for tracker-blind browsing without extraordinary measures. A simple plugin or cookie rules simply do not and cannot cut it. There are just umpteen million ways to fingerprint a device. What plugins do you have installed? What is your font list? What can be deduced about your device's make/model/r…

The EFF have a tool that shows how unique your browser fingerprint is: https://panopticlick.eff.org/

It's pretty scary

Re: The New York Times uses WebRTC to gather local IP addresses

#40
post #35

WebRTC, a protocol proposed by Google to W3C has applications in user tracking and detection of bots. Cui bono.

WebRTC's protocols are actually standardized at the IETF in the RTCWEB working group, by a large number of people. The W3C is in charge of the Javascript API (which is actually what people are complaining about here), again with a lot of contributors (yes, Google was bigger here).
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