CVE-2021-44228 PoC — Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints

Title:Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints (CVE-2021-44228)
Description:Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.

CVE-2021-44228

이글루코퍼레이션 원치현 Log4shell 분석보고서

# Log4shell
CVE-2021-44228
Log4j 아파치 재단의 무료오픈소스 java기반의 모든 애플가능 다양한 자바 기반 서비스 로그 기록 JDNI데이터및 객체를 발견 참고하기위한 자바 LDAP1389 Lookup JNDI를 통해 찾은 자원을 사용하는 기능

취약서버 구동 도커이미지파일 다운로드
Asudo git clone 
sudo docker build . -t vulnerable-app
새로 생성할 이미지를 vulnerable-app으로 현재 디렉토리에 도커 이미지 build 생성

github.com/welk

미사용 취약한 서버 종료
docker ps -a 실행중인 도커이미지 전체 확인
docker container 아이디 확인

 [4.0K]  /data/pocs/15f70867abc10bdc9926b98f9c5cbe7ea858d5ef
└── [ 704]  README.md

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