New Research Reveals Spectre Vulnerability Persists in Latest AMD and Intel Processors
Who:
Entities Involved: ETH Zürich researchers, targeting AMD and Intel processors.
What:
Discovery: New research reveals that even the latest AMD and Intel processors remain vulnerable to Spectre-style speculative execution attacks, undermining existing mitigations (IBPB) on x86 chips.
New Vulnerabilities Identified:
Intel: A microcode flaw allows bypassing IBPB on Intel’s Golden Cove and Raptor Cove architectures, causing cross-process Spectre leaks.
AMD: Post-Barrier Inception (PB-Inception) enables privileged memory leakage in AMD Zen 1(+) and Zen 2 processors.
Impact:
Security Risks: This vulnerability compromises sensitive data protection across both Intel and AMD chips, enabling attackers to bypass process boundaries and potentially access privileged data.
Mitigations: Intel issued a microcode patch (CVE-2023-38575), and AMD has recommended kernel updates for affected systems.
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