Intel has classified the vulnerability as L1 Terminal Fault or L1TF, it can access the processor cache of the first level and the protected area SGX of the latest generation of Intel processors. Theoretically, Foreshadow can access all virtual machines and provides a great danger for cloud infrastructure.
The researchers reported it to Intel in January. Foreshadow includes three variations. According to Intel in a note in the official blog, the new updates released recently, combined with earlier this year with updates that should protect most users from this vulnerability. Intel stressed that she did not know about when the vulnerability was used in real life.
Two versions Foreshadow users can protect themselves by using the already released updates, but the third, which threatens smaller number of users, including some data centers requires additional steps for regulation.