cv

General Information

Full Name Yoochan Lee
Date of Birth 26th October 1992
Languages Korean, English

Education

  • 2019 - Now
    M.S/Ph.D. Course in Electrical and Computer Engineering
    Seoul National University, Seoul, South Korea
  • 2012 - 2018
    B.S. Department of Compuser Science & Engineering
    Hanyang University, Seoul, South Korea

Experience

  • 2017
    Intern
    Raon WhiteHat, Seoul, South Korea
  • 2016
    Intern
    Naver Labs, Gyeonggi-do, South Korea

Honors and Awards

  • 2022
    • The 3rd place in DEFCON 30 CTF (StarBugs), Las Vegas, USA, Aug. 2022
  • 2021
    • The 4th place in DEFCON 29 CTF (StarBugs), Las Vegas, USA, Aug. 2021
  • 2020
    • The 11th place in DEFCON 28 CTF (Star-Bugs), Las Vegas, USA, Aug. 2020
  • 2019
    • The 15th place in DEFCON 27 CTF (CGC), Las Vegas, USA, Aug. 2019
  • 2018
    • The 11th place in Seccon CTF (GYG), Tokyo, Japan, Dec. 2018
    • The 1st place in Cyber Conflict Exercise and Contest 2018 (GYG), Jeju, South Korea, Oct. 2018
    • The 13th place in DEFCON 26 CTF (C.G.K.S), Las Vegas, USA, Aug. 2018
    • The 8th place in Midnight Sun CTF, Stockholm, Sweden, June. 2018
    • The 9th place in Codegate CTF (GYG), Seoul, South Korea, Apr. 2018
  • 2017
    • The 5th place in Cyber Conflict Exercise and Contest 2017 (GYG), Seoul, South Korea, Nov. 2017
    • The 3rd place in Belluminar POC 2017, Seoul, South Korea, Nov. 2017
    • The 9th place in DEFCON 25 CTF (RRR), Las Vegas, USA, Aug. 2017
    • Encouragement Award in Samsung CTF 2017, Seoul, South Korea, Aug. 2017
    • The 6th place in Nuit Du Hack 2017 (GYG), Paris, France, June. 2017
    • The 12th place in Seccon CTF 2017 (GYG), Tokyo, Japan, Jan. 2017
  • 2016
    • The 1st place in Secuinside Capture The Bug (Minionz), Seoul, South Korea, July. 2016
    • The 6th place in Codegate CTF (teambob), Seoul, South Korea, May. 2016
    • Top 10 in Best Of the Best 4th, Mar. 2016

Repoted Vulnerabilties (selected)

  • macOS - Kernel heap overflow leads to Local Privilege Escalation (CVE-2021-31077, $34,000)
  • Solidly - Drain tremendous funds using invalid type casting ($10,000)
  • macOS - Kernel Information Leakage (CVE-2018-4417)
  • macOS - Kernel Information Leakage (CVE-2018-4338)
  • macOS - Kernel Information Leakage (CVE-2018-4084)
  • macOS - Abitrary Kernel Code Execution (CVE-2017-7014)