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Erschienen in:
2016 | OriginalPaper | Buchkapitel
MalloryWorker: Stealthy Computation and Covert Channels Using Web Workers
verfasst von : Michael Rushanan, David Russell, Aviel D. Rubin
Erschienen in: Security and Trust Management
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Abstract
JavaScript execution and UI rendering are typically single-threaded; thus, the execution of some scripts can block the display of requested content to the browser screen. Web Workers is an API that enables web applications to spawn background workers in parallel to the main page. Despite the usefulness of concurrency, users are unaware of worker execution, intent, and impact on system resources. We show that workers can be used to abuse system resources by implementing a unique denial-of-service attack and resource depletion attack. We also show that workers can be used to perform stealthy computation and create covert channels. We discuss potential mitigations and implement a preliminary solution to increase user awareness of worker execution.