Fantastic timers and where to find them: High-resolution microarchitectural attacks in javascript

Michael Schwarz*, Clémentine Maurice, Daniel Gruss, Stefan Mangard

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem Konferenzband

Abstract

Research showed that microarchitectural attacks like cache attacks can be performed through websites using JavaScript. These timing attacks allow an adversary to spy on users secrets such as their keystrokes, leveraging fine-grained timers. However, the W3C and browser vendors responded to this significant threat by eliminating fine-grained timers from JavaScript. This renders previous high-resolution microarchitectural attacks non-applicable. We demonstrate the inefficacy of this mitigation by finding and evaluating a wide range of new sources of timing information. We develop measurement methods that exceed the resolution of official timing sources by 3 to 4 orders of magnitude on all major browsers, and even more on Tor browser. Our timing measurements do not only re-enable previous attacks to their full extent but also allow implementing new attacks. We demonstrate a new DRAM-based covert channel between a website and an unprivileged app in a virtual machine without network hardware. Our results emphasize that quick-fix mitigations can establish a dangerous false sense of security.

Originalspracheenglisch
TitelFinancial Cryptography and Data Security - 21st International Conference, FC 2017, Revised Selected Papers
Herausgeber (Verlag)Springer Verlag Wien
Seiten247-267
Seitenumfang21
Band10322 LNCS
ISBN (Print)9783319709710
DOIs
PublikationsstatusVeröffentlicht - 1 Jan 2017
Veranstaltung21st International Conference on Financial Cryptography and Data Security, FC 2017 - Sliema, Malta
Dauer: 3 Apr 20177 Apr 2017

Publikationsreihe

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Band10322 LNCS
ISSN (Print)0302-9743
ISSN (elektronisch)1611-3349

Konferenz

Konferenz21st International Conference on Financial Cryptography and Data Security, FC 2017
LandMalta
OrtSliema
Zeitraum3/04/177/04/17

ASJC Scopus subject areas

  • !!Theoretical Computer Science
  • !!Computer Science(all)

Fingerprint Untersuchen Sie die Forschungsthemen von „Fantastic timers and where to find them: High-resolution microarchitectural attacks in javascript“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren