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Academic researchers from multiple universities recently discovered a new Spectre-like method of extracting secrets from modernIntelprocessors.
However, Intel says that the original Spectre mitigation fixes these flaws, too.
Thus, they dubbed the vulnerability Pathfinder.
“This includes extracting secret images from libraries like libjpeg and recoveringencryptionkeys from AES through intermediate value extraction.”
PHRs job is to keep a record of the last branches taken.
It can be fooled to induce branch mispredictions and thus cause a victim program to run unintended code paths.
As a result, sensitive data gets exposed.
AMDs silicon seems to be immune to Pathfinder, the researchers concluded.
Those interested in learning more can read the entire paper onthis link.
