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With virtual machines I control, I don't have to use covert channels? https://cseweb.ucsd.edu/~hovav/dist/cloudsec.pdf https://cseweb.ucsd.edu/~hovav/dist/clou

by j_s 10y ago

With virtual machines I control, I don't have to use covert channels? https://cseweb.ucsd.edu/~hovav/dist/cloudsec.pdf https://cseweb.ucsd.edu/~hovav/dist/cloudsec.pdf (2009) Edit: we describe an empirical mea-surement study focused on understanding VM placement in the EC2 system and achieving co-resident placement for an adversary. To do this, we make use of network probing both to identify public services hosted on EC2 and to provide evidence of co-residence (that two instances share the same physical server). In particular, we utilize nmap, hping, and wget to perform network probes to determine liveness of EC2 instances The hard disk contention channel was used in Section 6 for establishing co-residence of instances.

Florin_Andrei 10y ago
That assumes the provider will disclose hardware info to you, which is rarely the case.
- j_s 10y ago
  (I apologize in advance if I've missed recognition of your authority on this topic; as an outsider it appears you are wrong.) Are you speaking generally or specifically addressing a shortcoming of the linked paper which demonstrates a methodology to determine whether or not two AWS VMs are on the same physical host? After a brief review I still don't see any mention of "hardware info" you mention as assumed being available. Edit: If something has come up since 2009 with this specific paper, I'd appreciate the heads-up!