On Thu, 14 May 2020 15:53:52 -0400 Tom Horsley horsley1953@gmail.com wrote:
On Thu, 14 May 2020 12:33:59 -0700 stan via users wrote:
These are meant to be silos, but this attack would allow someone on one virtual machine to capture data of another virtual machine running on the same core.
Reminds me of the very early days of KVM virtualization where I discovered that the debug registers weren't being properly context switched and you could set a watch on a memory address in a program running in one VM and get programs in other VMs to be interrupted as though they hit the watch (they fixed it :-).
Yes, meltdown is much more sophisticated, but the same idea. When I first read the description, I was astonished that someone had the ingenuity to come up with it.