Mark Dowd and Alex Sotirov demonstrated a technique for bypassing Vista s memory protections at Black Hat last year. Microsoft officials said at the time they were working on ways to defeat the pair’s attack and now that protection has arrived, in the form of Internet Explorer 8. Dowd, who works for IBM ISS in Australia, says in a blog post that the improvements that Microsoft has made in the security of IE 8 have the effect of preventing the memory-bypass attacks from working.
Source: https://threatpost.com/ie8-security-stops-memory-bypass-attacks-032609/72537/