WebRTC Vulernability Discovered
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WebRTC, a communications API used by nearly everyone except for Internet Explorer, has a vulnerability that can expose public IP addresses in addition to VPN'd IP addresses.
http://news.softpedia.com/news/WebRTC-in-Firefox-and-Chrome-Reveals-IPs-Behind-VPN-471881.shtml
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Thanks for the heads up.
The immediately important bit (until a resolution) from the article:
Disabling WebRTC can be done by installing the WebRTC Block extension for Chrome, while in Firefox the “media.peerconnection.enabled” needs to be set to “false” on the advanced configuration page (about:config).