Visible to the public Cashing in on the File-System Cache

TitleCashing in on the File-System Cache
Publication TypeConference Paper
Year of Publication2018
AuthorsTiwari, Trishita, Trachtenberg, Ari
Conference NameProceedings of the 2018 ACM SIGSAC Conference on Computer and Communications Security
Conference LocationNew York, NY, USA
ISBN Number978-1-4503-5693-0
Keywordscompositionality, covert channels, file system caches, resilience, Scalability, side channels

We consider the disk cache (file-system cache) information channel, and show how it can be exploited on various systems to yield potentially sensitive information. Our approach can be used locally by an unprivileged adversary to detect whether another user is writing to disk, and if so, the rate at which data is being written. Further, we also show how an attacker can detect whether specific files have been recently accessed by the victim. We then extend this attack to remote access through a web server, using timing analysis to identify recent access of chosen pages.

Citation Keytiwari_cashing_2018