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This advanced course analyzes RIDL/MDS attacks against modern Intel CPUs, covering speculative execution, Flush+Reload, security domains, data leakage, attack scenarios, portability, and mitigations. It demonstrates extracting secrets from SGX, virtual machines, and browser contexts.
Syllabus
Intro
MDS ATTACKS
Speculative execution attacks
BACKGROUND
FLUSH + RELOAD
SECURITY DOMAINS
Previous Attacks
LEAKY SOURCES
Manuals
Line Fill Buffers?
Experiments
Confused Deputy
Challenges
Filtering Data
Attack scenarios
In-flight data
More examples
Arbitrary kernel leak
Portability
Existing mitigations
RIDL mitigations
Is the attack realistic??
Conclusion
Taught by
Hack In The Box Security Conference