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An exploration of L2 cache covert channels in virtualized environments (2011)
| Content Provider | CiteSeerX |
|---|---|
| Author | Xu, Yunjing Bailey, Michael Jahanian, Farnam |
| Description | IN PROCEEDINGS OF THE 3RD ACM WORKSHOP ON CLOUD COMPUTING SECURITY WORKSHOP (CCSW’11 |
| Abstract | Recent exploration into the unique security challenges of cloud computing have shown that when virtual machines belonging to different customers share the same physical machine, new forms of cross-VM covert channel communication arise. In this paper, we explore one of these threats, L2 cache covert channels, and demonstrate the limits of these this threat by providing a quantification of the channel bit rates and an assessment of its ability to do harm. Through progressively refining models of cross-VM covert channels from the derived maximums, to implementable channels in the lab, and finally in Amazon EC2 itself we show how a variety of factors impact our ability to create effective channels. While we demonstrate a covert channel with considerably higher bit rate than previously reported, we assess that even at such improved rates, the harm of data exfiltration from these channels is still limited to the sharing of small, if important, secrets such as private keys. |
| File Format | |
| Publisher Date | 2011-01-01 |
| Access Restriction | Open |
| Subject Keyword | Amazon Ec2 New Form Bit Rate Unique Security Challenge Effective Channel Physical Machine L2 Cache Covert Channel Channel Bit Rate Private Key Cross-vm Covert Channel Covert Channel Virtualized Environment Implementable Channel Different Customer Share Data Exfiltration Recent Exploration Cross-vm Covert Channel Communication Arise Virtual Machine |
| Content Type | Text |
| Resource Type | Proceeding Conference Proceedings |
