New BTR Attack Variant Exploits Spectre v2 to Extract Linux Root Passwords in Minutes

A new Branch Target Reuse (BTR) attack variant has been developed that can recover root password hashes on Intel computers running Linux in an average of 3-5 minutes. The attack is a variant of Spectre v2, a class of hardware vulnerabilities affecting modern processors. The BTR attack exploits speculative execution mechanisms in Intel processors to leak sensitive information from system memory. This represents a practical exploitation method that significantly reduces the time required to extract critical security credentials from affected Linux systems.