NDLI: Pileus: protecting user resources from vulnerable cloud services

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Pileus: protecting user resources from vulnerable cloud services

Content Provider	ACM Digital Library
Author	Jaeger, Trent Ge, Xinyang Sun, Yuqiong Petracca, Giuseppe
Abstract	Cloud computing platforms are now constructed as distributed, modular systems of cloud services, which enable cloud users to manage their cloud resources. However, in current cloud platforms, cloud services fully trust each other, so a malicious user may exploit a vulnerability in a cloud service to obtain unauthorized access to another user's data. To date, over 150 vulnerabilities have been reported in cloud services in the OpenStack cloud. Research efforts in cloud security have focused primarily on attacks originating from user VMs or compromised operating systems rather than threats caused by the compromise of distributed cloud services, leaving cloud users open to attacks from these vulnerable cloud services. In this paper, we propose the Pileus cloud service architecture, which isolates each user's cloud operations to prevent vulnerabilities in cloud services from enabling malicious users to gain unauthorized access. Pileus deploys stateless cloud services "on demand" to service each user's cloud operations, limiting cloud services to the permissions of individual users. Pileus leverages the decentralized information flow control (DIFC) model for permission management, but the Pileus design addresses special challenges in the cloud environment to: (1) restrict how cloud services may be allowed to make security decisions; (2) select trustworthy nodes for access enforcement in a dynamic, distributed environment; and (3) limit the set of nodes a user must trust to service each operation. We have ported the OpenStack cloud platform to Pileus, finding that we can systematically prevent compromised cloud services from attacking other users' cloud operations with less than 3% additional latency for the operation. Application of the Pileus architecture to Open-Stack shows that confined cloud services can service users' cloud operations effectively for a modest overhead.
Starting Page	52
Ending Page	64
Page Count	13
File Format	PDF
ISBN	9781450347716
DOI	10.1145/2991079.2991109
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2016-12-05
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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