T05 · Unauthorized Access and Privilege Escalation
Error
- Location
- scripts/web_server.py:22
- Finding
- Unauthenticated Network Exposure of Calendar Data and Event Creation API<![CDATA[ ## Vulnerability Details **File Location**: `scripts/web_server.py:22-48` **Vulnerability Type**: Missing authentication and unrestricted network binding **Risk Level**: High ### Vulnerable Code ```python @app.route('/api/events') def get_events(): """获取日程列表""" date = request.args.get('date') events = scheduler.list_events(date) return jsonify(events) @app.route('/api/events', methods=['POST']) def create_event(): """创建日程""" data = request.json event_id = scheduler.add_event( title=data.get('title'), start_time=data.get('start_time'), end_time=data.get('end_time'), location=data.get('location'), description=data.get('description') ) return jsonify({'success': True, 'id': event_id}) if __name__ == '__main__': print("="*50) print("日程管理 Web 服务") print("="*50) print("访问地址: http://localhost:8080") print("="*50) app.run(host='0.0.0.0', port=8080, debug=True) ``` ### Technical Analysis The calendar API does not enforce authentication or authorization. The `GET /api/events` endpoint returns stored calendar information, including titles, start and end times, locations, descriptions, and reminder settings. The `POST /api/events` endpoint permits callers to create new events and associated reminder-job records. Although the application prints a localhost URL, it binds to `0.0.0.0`, exposing the service on every available network interface. Any client that can reach TCP port 8080 can therefore invoke these endpoints without presenting credentials. The application also performs no server-side ownership or access-control checks. Consequently, network reachability is treated as sufficient permission to access private calendar information and modify application state. ### Attack Path 1. An attacker identifies a host running the Skill with TCP port 8080 reachable from the local network, container network, or externally exposed interface. 2. The attacker sends ` ...[truncated 1100 chars]
- Remediation
- <![CDATA[ ## Remediation Suggestions 1. Bind the development server to the loopback interface by default: ```python app.run(host="127.0.0.1", port=8080, debug=False) ``` 2. Add authentication to every calendar endpoint. Use securely generated session identifiers or a suitable established authentication framework. 3. Enforce authorization for every read and mutation operation rather than relying only on authentication. 4. Add CSRF protection to all state-changing browser endpoints. 5. Require an explicit configuration option before permitting LAN or public-interface exposure. 6. Place any intentionally network-accessible deployment behind a reverse proxy that provides TLS, authentication, request limits, and access logging. 7. Validate all JSON fields, including required values, types, maximum lengths, and valid date ranges. 8. Apply rate limits and request-size limits to event-creation endpoints. ]]>