🎮 Steam Machine
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🧩 Steam Frame
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🔐 Fun-reliable Side-Channels for Cross-Container Communication
A fascinating and technically sophisticated study that exposes a subtle but serious isolation flaw in container environments, blending clever engineering with crucial security insight.
A researcher unveils a newly discovered side-channel in the Linux kernel that enables cross-container communication under default Docker and Kubernetes configurations. By exploiting time namespaces and POSIX advisory locks, containers can detect and exchange data with others on the same host, effectively forming a low-level chat system across isolated environments. The article presents proof-of-concept code, synchronization methods, message passing techniques, and discusses security implications and mitigation strategies.
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