CERIAS - Center for Education and Research in Information Assurance and Security

Skip Navigation
CERIAS Logo
Purdue University - Discovery Park
Center for Education and Research in Information Assurance and Security

Enforcing Least Privilege Memory Views for Multithreaded Applications

Terry Ching-Hsiang Hsu

Terry Ching-Hsiang Hsu - Purdue University

Oct 12, 2016

Size: 39.0MB

Download: Video Icon MP4 Video  
Watch in your Browser   Watch on Youtube Watch on YouTube

Abstract

Failing to properly isolate components in the same address space has resulted in a substantial amount of vulnerabilities. Enforcing the least privilege principle for memory accesses can selectively isolate software components to restrict attack surface and prevent unintended cross-component memory corruption. However, the boundaries and interactions between software components are hard to reason about and existing approaches have failed to stop attackers from exploiting vulnerabilities caused by poor isolation. We present the secure memory views (SMV) model: a practical and efficient model for secure and selective memory isolation in monolithic multithreaded applications. SMV is a third generation privilege separation technique that offers explicit access control of memory and allows concurrent threads within the same process to partially share or fully isolate their memory space in a controlled and parallel manner following application requirements. An evaluation of our prototype in the Linux kernel (TCB < 1,800 LOC) shows negligible runtime performance overhead in real-world applications including Cherokee web server (< 0.69%), Apache httpd web server (< 0.93%), and Mozilla Firefox web browser (< 1.89%) with at most 12 LOC changes.

About the Speaker

Terry Hsu is a PhD candidate at Purdue University studying memory systems and system security. His research is concerned with the development of operating systems. Particular topics of interest include memory model, memory safety, memory isolation, and operating system security

Unless otherwise noted, the security seminar is held on Wednesdays at 4:30P.M. STEW G52, West Lafayette Campus. More information...

Disclaimer

The views, opinions and assumptions expressed in these videos are those of the presenter and do not necessarily reflect the official policy or position of CERIAS or Purdue University. All content included in these videos, are the property of Purdue University, the presenter and/or the presenter’s organization, and protected by U.S. and international copyright laws. The collection, arrangement and assembly of all content in these videos and on the hosting website exclusive property of Purdue University. You may not copy, reproduce, distribute, publish, display, perform, modify, create derivative works, transmit, or in any other way exploit any part of copyrighted material without permission from CERIAS, Purdue University.