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This article details Branch Target Reuse (BTR), a novel side-channel attack exploiting stale CPU branch-prediction data to exfiltrate sensitive information like Linux root password hashes from memory. The research highlights critical vulnerabilities in JIT compilers within the Linux kernel, browsers, and runtimes, demonstrating how speculative execution can leak protected data even after code blocks are freed. This represents a significant advancement in hardware-level security threats that directly impacts the integrity of AI infrastructure and cloud environments relying on Linux systems.
Surse care acoperăCybersecurity News, InfoQ
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Researchers Use New CPU Attack to Steal Linux Root Password Hash From Memory

Cybersecurity News3 min de cititArticolul și perspectiva sunt în engleză.

Branch Target Reuse (BTR) is a newly disclosed variant of the Spectre-v2 attack that leverages stale CPU branch-prediction data to leak sensitive information from Linux memory, including root password hashes. This attack specifically targets just-in-time (JIT) compilers found in the Linux kernel, web browsers, and various language runtimes. BTR takes advantage of a vulnerability that […] The post Researchers Use New CPU Attack to Steal Linux Root Password Hash From Memory appeared first on Cyber Security News.

Branch Target Reuse (BTR) is a newly disclosed variant of the Spectre-v2 attack that leverages stale CPU branch-prediction data to leak sensitive information from Linux memory, including root password hashes. This attack specifically targets just-in-time (JIT) compilers found in the Linux kernel, web browsers, and various language runtimes. BTR takes advantage of a vulnerability that arises when code…

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