It didn't manage to do it during the most recent Pwn2Own challenge, but VUPEN Security is now claiming that it has finally managed to hack Google's Chrome browser and crack its so-called "sandbox." According to the firm, the exploit relies on some newly discovered zero day vulnerabilities, works on all Windows operating systems (and only Windows, apparently), and could give malicious websites the ability to download code from a remote source and execute it on a user's computer -- the video after the break shows an example, in which the Windows Calculator applicat