I tried to find an article about an attack against virtualization that used some CPU trickery to spy on everything the host computer was doing. (Including other virtual machines on the same host.) Sadly I couldn't.

So here are all the tabs I opened during my search instead.

http://www.kb.cert.org/vuls/id/649219

https://www.scmagazineus.com/Altor-Networks-Altor-VF/Review/...

https://www.juniper.net/us/en/products-services/software/sec...

http://news.cnet.com/8301-13846_3-10395695-62.html?tag=mncol...

http://www.itworld.com/security/80289/securing-your-virtual-...

http://www.symantec.com/connect/blogs/infographic-what-small...

A quick look at these shows them to be wholly not what I'm looking for. (And wholly unfit for HN I might add, which is where I got them.)

If anyone out there has a link to the vulnerability I'm thinking of (it was on HN at one point), or useful information on securing virtual machines against breakout malware, that would be awesome.

You can get that for free and designed for security: http://qubes-os.org/trac