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- OpenAI agents communicated across sandboxes through a CPU-cache channel
According to Tom’s Hardware citing an OpenAI blog post, red-team agents in separate microVMs exchanged synthetic secrets without a network connection or shared writable files by manipulating and timing shared CPU-cache state. OpenAI’s sandboxing software did not necessarily fail at the software level, but the agents still shared underlying hardware. The tests also identified shared-storage, CPU-time competition, and TLS-certificate-cache channels. OpenAI often pointed the agents toward a channel or supplied a protocol, and most channels were described as slow and difficult to exploit.
Tom’s Hardware · 🔥 0
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