New Intel CPU Vulnerability ‘Indirector’ Found

Researchers from the University of California, San Diego, have discovered a new vulnerability in modern Intel processors, specifically the Raptor Lake and Alder Lake generations. This vulnerability, named ‘Indirector,’ can be used to steal sensitive information from the CPU. 

The problem lies in two components of the CPU: the Indirect Branch Predictor (IBP) and the Branch Target Buffer (BTB). These components help the CPU make quick decisions, but they have flaws that attackers can exploit. The researchers identified three main techniques used in Indirector attacks: 

1. iBranch Locator: A tool that helps attackers find specific parts of the CPU’s decision-making process by identifying the indices and tags of victim branches. 

2. IBP/BTB Injections: Tricks to manipulate the CPU’s predictions, causing it to run unauthorized code through targeted injections. 

3. ASLR Bypass: A method to break security measures that protect the memory layout, making it easier to predict and control the CPU. 

By using these techniques, attackers can trick the CPU into running their own code and accessing sensitive data like passwords or encryption keys. This is accomplished by combining the speculative execution achieved through targeted injections with cache side-channel techniques, suc

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