Spectre Bug Returns, This Time Haunting JIT Engines
The Spectre vulnerability reemerges, threatening JIT engines with new attack vectors. Researchers highlight risks of sensitive data leakage.
The Spectre microarchitecture vulnerability has resurfaced, now affecting just-in-time (JIT) engines. Researchers reveal that speculative execution exposes systems to side channel attacks that can leak sensitive information. A new variant, Branch Target Reuse (BTR), targets JIT compilers, allowing attackers to exploit stale indirect branch predictions to gain control over speculative execution flows. This poses significant risks, as demonstrated by proof-of-concept exploits revealing root password hashes.
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