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윤석찬

Offensive Web Security Researcher

Security Contributor of GitHub, Python, Django, Airflow, Ruby, Ruby-on-Rails, Java Spring

Education

2020년 03월 - Present

컴퓨터공학과 재학

경희대학교

2017년 07월 - 2018년 05월

취약점분석트랙 수료

차세대 보안리더 양성 프로그램 Best of the Best 6기

2017년 03월 - 2020년 02월

해킹방어과 졸업

한국디지털미디어고등학교

Work Experience

2025년 07월 - Present 3 개월

Security Team Member (Volunteer)

Airflow Security Team, Apache Software Foundation USA

  • • Airflow 팀에 제보되는 보안 이슈 검토 및 대응
  • • 오픈소스 커뮤니티와의 협업
  • • ASF 가이드라인에 따라 프로젝트의 보안 수준 유지
2025년 04월 - Present 6 개월

Security Researcher

Zellic.io USA

  • • Web3 블록체인 기반 서비스 Web2 컴포넌트 보안 감사
2023년 09월 - 2025년 03월 1 년 6 개월

OO부대, OO병

국방부 산하 연구소

  • • OO 연구 개발
2020년 07월 - 2023년 06월 3 년

R&D / 선제대응팀, Security Engineer

스틸리언

  • • 웹 모의해킹
  • • 교육시스템 (Cyber Drill System, Django + React) 개발 및 CTF 운영
  • • 사내 기술 관리 도구, 기술블로그, 배포시스템 등 인프라 개발 및 유지보수

CTF Awards

2025 사이버공격방어대회

Finalist
일반부문

- 국가정보원 주최

- Team: 경희대미남해커들 (KHU's hansome hackers)

2025 DEF CON CTF 33

Finalist

- Nautilus Institute 주최

- Team: Cold Fusion

🏆 2024 화이트햇 콘테스트

용사부문

- 국방부 주최

- Team: 키보드워리어플랫폼

1st, 국방부장관상

2023 CODEGATE

Finalist
대학부

- 과학기술정보통신부 주최

- Team: 경희대미남해커들 (KHU's hansome hackers)

2022 CODEGATE

Finalist
대학부

- 과학기술정보통신부 주최

- Team: 경희대미남해커들 (KHU's hansome hackers)

🏆 2022 사이버공격방어대회

공공부문

- 국가정보원 주최

- Team: resilience

2nd, 국가보안연구소장상

🏆 2022 HACKTHEON SEJONG 전국대학생사이버보안경진대회

- 세종특별자치시 주최

- Team: 라임도둑

6st, 국가보안연구소장상

🏆 2021 사이버공격방어대회

공공부문

- 국가정보원 주최

- Team: resilience

2nd, 국가보안연구소장상

🏆 2019 사이버작전경연대회

학생부

- 국방부 주최

- Team: 윤석찬TV구독과좋아요알림설정까지

2nd, 사이버작전사령관상

🏆 2018 정보보안경진대회

개인예선

- 교육부 주최

1st, 서울여대 총장상

🏆 2018 정보보안경진대회

단체본선

- 교육부 주최

- Team: 문시우1인팀

1st, 교육부 장관상

🏆 2017 정보보안경진대회

단체본선

- 한국교육학술정보원 주최

- Team: 4-day exploit

1st, 한국교육학술정보원장상

Disclosed Vulnerabilities

Python Python

CVE-2024-7592

Denial of Service
Internals

A vulnerability in Python allows quadratic complexity parsing when handling cookies containing backslashes, potentially leading to performance degradation.

Django Django

CVE-2023-36053

Regular Expression Denial of Service
Internals

In Django 3.2 before 3.2.20, 4 before 4.1.10, and 4.2 before 4.2.3, `EmailValidator` and `URLValidator` are subject to a potential ReDoS (regular expression denial of service) attack via a very large number of domain name labels of emails and URLs.

Django Django

CVE-2024-24680

Denial of Service
Templates

A vulnerability in the Django `intcomma` template filter could lead to a potential denial of service if certain crafted inputs are processed.

Django Django

CVE-2024-27351

Regular Expression Denial of Service
Utilities

A vulnerability in Django's `Truncator.words()` function may allow a ReDoS attack under certain circumstances.

Django Django

CVE-2024-21520

Cross-Site Scripting
Rest Framework

The browserable API of the Django Rest Framework is vulnerable to cross-site scripting due to improper sanitization of user-supplied inputs.

Django Django

CVE-2024-41991

Denial of Service
Utilities

A vulnerability in Django's `urlize` function and `AdminURLFieldWidget` could allow for a denial of service under specific crafted input conditions.

Django Django

CVE-2024-53908

SQL Injection
Database

A vulnerability in the `HasKey` function in Django when using Oracle databases may allow a potential SQL injection.

Django Django

CVE-2025-48432

Log Injection
Internal Logging

Internal HTTP response logging used request.path directly, allowing control characters (e.g. newlines or ANSI escape sequences) to be written unescaped into logs.

Apache Apache Airflow

CVE-2024-39877

Code Execution
Scheduler

A vulnerability in Apache Airflow's scheduler allows DAG authors to execute arbitrary code, potentially compromising the scheduler node.

Apache Apache Airflow

CVE-2024-39863

Cross-Site Scripting
Web Interface

Improper sanitization in Apache Airflow's web interface could lead to a cross-site scripting vulnerability.

Apache Apache Airflow

CVE-2024-45034

Code Execution
Scheduler

Authenticated DAG authors in Apache Airflow can execute arbitrary code on scheduler nodes, leading to potential system compromise.

Ruby Ruby

CVE-2024-41123

Denial of Service
REXML

Vulnerabilities in Ruby's REXML library allow attackers to cause a denial of service by crafting malicious XML inputs.

Ruby Ruby on Rails

CVE-2024-47887

Regular Expression Denial of Service
Action Controller

Ruby on Rails' Action Controller is vulnerable to a potential regular expression denial of service when handling HTTP token authentication.

Ruby Ruby on Rails

CVE-2024-41128

Regular Expression Denial of Service
Action Dispatch

A vulnerability in Rails' Action Dispatch may allow a regular expression denial of service when filtering query parameters.

Java Java Spring

CVE-2024-38809

Denial of Service
Framework

Spring Framework is vulnerable to a potential denial of service caused by a crafted conditional HTTP request.

GitHub GitHub

HackerOne #2646500

Denial of Service
GitHub & GitHub Enterprise

GitHub is vulnerable to a potential denial of service caused by a malicously crafted HTTP request.

NAVER NAVER

NBB-1126

Stored XSS
NAVER service

NAVER is vulnerable to a stored-xss caused by a crafted payload.

NAVER NAVER

NBB-1143

SQL Injection
NAVER service

NAVER is vulnerable to a SQL injection caused by a crafted payload.

NAVER NAVER

NBB-1260

Stored XSS
NAVER service

NAVER is vulnerable to a stored XSS caused by a crafted payload.

Talks

2024

" 해커의 관점에서 바라본 Django Framework " (한국어)

PyCon KR 2024

2023

" Django Framework N-day 취약점 분석과 시큐어 코딩 가이드 " (한국어)

CODEGATE 2023

2023

" Django 프레임워크 1-day analysis " (한국어)

제 26회 해킹캠프

2022

" 모던 웹 서비스에서의 버그케이스와 시큐어코딩 " (한국어)

STEALIEN Security Semiar

Blogs