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CISPA - Helmholtz-Zentrum für Informationssicherheit gGmbH Stuhlsatzenhaus 5 66123 Saarbrücken, Germany https://cispa.de
Contact Ms Dr. Eva Michely +49 681 870832774
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CISPA - Helmholtz-Zentrum für Informationssicherheit gGmbH

Sicherheitslücke „GhostWrite“ untergräbt Integrität von T-Head RISC-V CPU

CPU-Sicherheit

(PresseBox) (Saarbrücken, )
Mit einer neuen Fuzzing-Methode für RISC-V CPUs hat CISPA-Forscher Fabian Thomas aus der Forschungsgruppe von Dr. Michael Schwarz architekturelle Schwachstellen in den T-Head CPUs XuanTie C906, C908 und C910 entdeckt. Die bedeutendste dieser drei Schwachstellen trägt den Namen GhostWrite und betrifft die XuanTie C910. GhostWrite ermöglicht unbefugten Nutzer:innen direkten Zugriff auf das DRAM; so können Daten direkt im physikalischen Speicher geändert werden. Außerdem kann sowohl mit der Festplatte als auch mit Peripheriegeräten wie z.B. Netzwerkkarten und Grafikkarten interagiert werden. Neben GhostWrite hat Thomas auch zwei sogenannte “halt-and-catch-fire” CPU-Schwachstellen entdeckt, die für Denial-of-Service-Angriffe ausgenutzt werden können.

RISC-V: Jung, offen, flexibel und
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