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Gyeongje Oh

Offensive Security Researcher

ogj0824@gmail.com GitHub LinkedIn
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Education

2025.03 - Current
KYUNGHEE UNIVERSITY

M.S. in Department of Computer Engineering

PWNLAB (Lab Leader) · Advisor: Prof. Daehee Jang

2019.03 - 2025.02
KYUNGHEE UNIVERSITY

B.S. in Department of Software Convergence

Including military service

Work Experience

2025.07 - 2025.08
GMO CyberSecurity by Ierae Internship

Aerospace Village in DEFCON 33 Conference (Las Vegas, Bahrain)

2022.03 - 2023.12
HAYYIM SECURITY Security Researcher

Vulnerability analysis & exploitation in Browser, Office, VM, RDP

External Experience

2023.04 - 2025.02
PWNLAB Intern

Kyunghee Univ. Dept. of Computer Engineering (Advisor: Prof. Daehee Jang)

2018.03 - 2019.02
Best of the Best 7th Vulnerability Analysis Track

Certificate

2017.03 - 2017.12
Information Security Gifted Education Center

Advanced Professional Class B, Seoul Women's University

Certificate

Publications

Pending
"CCSDS based Firewall for Modern Satellite System"

Computers & Security (SCI)

Woohyeop Im, Gyeongje Oh, Shinichi Kan, Kosuke Ito, Hikohiro Lin, Sayeon Kim, Jinwoo Jeong, Sangbom Yun, Daehee Jang

2026.05
"인공위성 RF 신호 생성을 통한 오픈소스 지상국 시스템 취약점 연구"

정보보호학회 (KCI)

오경제, 장대희

Hacking Competition (CTF) Awards

International

2025
5th Cykor CTF 경희대미남해커들
8th DEFCON 33 CTF Final Cold Fusion
9th CODEGATE CTF Final 경희로운세종대왕
2024
6th HITCON CTF Final Cold Fusion
9th DEFCON 32 CTF Final Cold Fusion
2023
4th HITCON CTF Final 프로그램털모찌
6th CODEGATE CTF University Final 경희대미남해커들
10th DiceCTF HotIceAmericano $100
2022
10th CODEGATE CTF University Final 경희대미남해커들
5th Samsung Hacker's Playground CTF KoreaNumberOne
2018
9th CODEGATE CTF Junior Final 오경제

Domestic

2025
5th CCE CTF Final 경희대미남해커들
2024
Excellence LG U+ Hacking Competition 리버서 구해요 $3,000
Special AutoHack Hacking Competition 오똑핵
Special FIESTA Hacking Competition 학석박입니다 $400
Excellence HackTheon Sejong QWER $3,000
2022
Excellence HackTheon Sejong 라임도둑 $1,000
2018
Gold Information Security Olympiad 오경제 $1,000
2017
Bronze Information Security Olympiad 오경제 $300

Bug Bounty

KISA Bug Bounty $3,100

Remote Code Execution via Heap Overflow in Viewer

KVE-2023-0095, KVE-2023-5125

Presentations

2026.07
코드엔진 2026

"인공위성 RF 신호 생성을 통한 오픈소스 지상국 시스템 취약점 연구"

2026.05
정보보호학회 2026

"인공위성 RF 신호 생성을 통한 오픈소스 지상국 시스템 취약점 연구"

2025.11
DEFCON Aerospace Village — Bahrain

"CCSDS based Firewall for Modern Satellite System"

2025.08
DEFCON Aerospace Village — Las Vegas

"CCSDS based Firewall for Modern Satellite System"

Remarks

2020.04 - 2022.01
Republic of Korea Air Force

MOS: Information Security

CTF Challenge Author / Organizer

  • 2023/2024 International Drone Hacking Competition
  • 2022 KHU Software Security Competition
  • 2017/2018 ROOTCTF

Wargame

*****
Contact: ogj0824@gmail.com