The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 2019
Filed:
Mar. 28, 2017
Symantec Corporation, Mountain View, CA (US);
William E. Sobel, Jamul, CA (US);
Bruce McCorkendale, Manhattan Beach, CA (US);
Symantec Corporation, Mountain View, CA (US);
Abstract
The disclosed computer-implemented method for detecting modification attacks on shared physical memory may include (i) identifying a page frame of physical memory that is shared by a plurality of virtual machines, (ii) calculating a first checksum for the page frame, (iii) calculating, while the page frame is shared by the plurality of virtual machines and before any of the plurality of virtual machines writes to a page of virtual memory that is mapped to the page frame, a second checksum for the page frame, (iv) detecting a modification attack (such as a rowhammer attack) on the page frame by one of the plurality of virtual machines by detecting that the first checksum does not equal the second checksum, and (v) performing a security action in response to detecting the modification attack. Various other methods, systems, and computer-readable media are also disclosed.