The code of an exploit that takes advantage of a zero-day vulnerability in Firefox was published on the Tor Project mailing list. If hidden inside a web page can help to identify the users who use the famous anonymous communication network, accessible via the Tor Browser based on Firefox. Mozilla has confirmed that it is working to develop a patch quickly.
The exploit makes direct calls to
kernel32.dll and change the memory location of the payload based on the browser version. Who developed the code and then wants the certainty that the exploit works on any release between the 41 and 50 . Firefox 45 ESR is the version used by the Tor Browser. A spokesperson for Mozilla said that the fix is in development.