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September 11-14, 2017 - Los Angeles, CA
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Wednesday, September 13 • 2:00pm - 2:40pm
Control-flow Enforcement Technology - Yu-cheng Yu, Intel

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Hackers often look for buffer overflow opportunities in an application and feed it illegal input data to overwrite function return addresses, combining with “gadgets”, manipulate normal program execution path to achieve malicious behavior in a system. These techniques do not need any code injection, cannot be detected by binary signatures, and the resulting activities easily skip detection. CET blocks these exploits with the “shadow stack” that stores a secure copy of every function return address and the “end-branch” opcode that prevents arbitrary decoding of multi-byte instructions. This presentation gives an overview of CET and highlights software implementation for Linux.


Wednesday September 13, 2017 2:00pm - 2:40pm PDT
Plaza I/II
  LinuxCon Tracks