I Heard It through the Firewall: Exploiting Cloud Management Services as an Information Leakage Channel
Proceedings of the 8th ACM Symposium on Cloud Computing (SoCC) 2018.
© Copyright 2018 by authors
Though there has been much study of information leakage channels exploiting shared hardware resources (memory, cache, and disk) in cloud environments, there has been less study of the exploitability of shared software resources. In this paper, we analyze the exploitability of the cloud networking services (which is shared among cloud tenants), and introduce a practical method for building information leakage channels by monitoring workloads on the cloud networking services through the virtual firewall. We also demonstrate the practicality of this attack by implementing two different covert channels in OpenStack as well as a new class of side channels that can eavesdrop on infrastructure-level events. By utilizing a Long Short-Term Memory (LSTM) neural network model, our side channel attack could detect infrastructure level VM creation/termination events with 93.3% accuracy.