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September 11-14, 2017 - Los Angeles, CA
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Monday, September 11 • 11:00am - 11:40am
A Practical Approach of Tailoring Linux Kernel - Junghwan Kang, National Security Research Institute

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Today Linux Kernel is being used on various devices & platforms. So there are a lot of features in Linux kernel to support them, more than 30 architectures, 300 feature groups, 20,000 configuration options. The variety of features widens attack surface of Linux kernel, e.g. CVE-2016-3955: Buffer overflow in USB/IP, CVE-2017-6074: a double-free in DCCP.
As a result, Linux kernel is needed to tailor as its intended use. However, the configuration is hard due to the excessive number & choices. Although there are also preceding methods like undertaker-tailor, kernel make option (localmodconfig) that are unpractical & insufficient.
In this presentation, we introduce a improved approach that is a fully automatic system to tailor Linux kernel. First, we go through pros & cons of related works, and then we describe a design of our system, demonstrate how our system works and minimize Linux kernel.

avatar for Junghwan Kang

Junghwan Kang

Security Researcher, National Security Research Institute
Junghwan Kang is a security researcher at National Security Research Institute of South Korea. He has studied methods and techniques for enhancing the security of a customized Linux distribution for a few years. He was a speaker of Open Source Summit North America 2017 and Blackhat... Read More →

Monday September 11, 2017 11:00am - 11:40am
Georgia I/II