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Thursday, October 29 • 14:00 - 14:30
Kernel Integrity Enforcement with HLAT In a Virtual Machine - Chao Gao, Intel Corporation

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Some VMMs are using virtualization technology to enhance guest kernel security. Enforcing guest kernel integrity is a topic that has been explored many times. Read-only page where guest kernel locates can help to prevent tampering but cannot effectively prevent “remapping” attacks which edit guest page table to hijack control flow. Some solutions have to introduce complex mechanism (for example, track all guest page table changes somehow) to defend against “remapping” attack at the cost of performance. Hypervisor-manage linear address translation (HLAT), a new extension to Intel VT-x, provides an efficient solution to enforce guest kernel integrity. This presentation will analyze the challenges in kernel integrity enforcement, then describe how to enforce kernel integrity in a virtual machine with HLAT.


Chao Gao

Cloud Software Engineer, Intel
Chao has work for Intel for 4 years as a software engineer. He is responsible for enabling new Intel virtualization features in KVM/Xen and is familiar with interrupt virtualization, performance tuning and virtualization base security. Currently, Chao is working on using HLAT to enhance... Read More →

Thursday October 29, 2020 14:00 - 14:30 GMT
LSS Theater
  Linux Security Summit (LSS)