| name | s800-vehicle-network-security-testing |
| description | Security testing framework for automotive vehicle networks including CAN, LIN, and FlexRay protocols |
| triggers | ["test vehicle network security","automotive CAN bus testing","vehicle ECU security assessment","scan car network vulnerabilities","inject CAN messages for testing","fuzzing automotive protocols","analyze vehicle network traffic","test ECU authentication"] |
S800 Vehicle Network Security Testing Framework
Skill by ara.so — Security Skills collection.
Overview
S800 is a comprehensive security testing framework designed for automotive vehicle networks. It supports testing and analysis of common automotive protocols including CAN (Controller Area Network), LIN (Local Interconnect Network), and FlexRay. The framework provides tools for network scanning, message injection, fuzzing, traffic analysis, and vulnerability assessment of vehicle Electronic Control Units (ECUs).
Key capabilities:
- CAN/LIN/FlexRay protocol support
- Network traffic capture and analysis
- Message injection and replay attacks
- Protocol fuzzing for vulnerability discovery
- ECU authentication testing
- Diagnostic protocol (UDS/OBD-II) security testing
Installation
Prerequisites
sudo apt-get update
sudo apt-get install -y can-utils python3-pip git
sudo modprobe can
sudo modprobe can_raw
sudo modprobe vcan
Framework Installation
git clone https://github.com/zhu-zhu666/S800-Vehicle-Network-Security-Testing-Framework.git
cd S800-Vehicle-Network-Security-Testing-Framework
pip3 install -r requirements.txt
sudo ip link add dev vcan0 type vcan
sudo ip link set up vcan0
Hardware Setup
For real vehicle testing, connect CAN hardware interface:
sudo ip link set can0 type can bitrate 500000
sudo ip link set up can0
Core Components
Network Scanner
Discover active ECUs and network topology:
from s800.scanner import NetworkScanner
from s800.core import CANInterface
interface = CANInterface('can0')
scanner = NetworkScanner(interface)
active_ecus = scanner.scan_network(timeout=10)
for ecu in active_ecus:
print(f"ECU ID: {ecu.id}, Address: {hex(ecu.address)}")
print(f"Services: {ecu.supported_services}")
Message Injection
Send crafted CAN messages for testing:
from s800.injection import MessageInjector
from s800.protocols import CANMessage
injector = MessageInjector('can0')
msg = CANMessage(
arbitration_id=0x123,
data=[0x02, 0x10, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00],
is_extended=False
)
injector.send(msg)
injector.send_burst(
arbitration_id=0x7DF,
data=[0x02, 0x3E, 0x00],
count=1000,
interval=0.001
)
Traffic Analysis
Capture and analyze network traffic:
from s800.analysis import TrafficAnalyzer
from s800.capture import PacketCapture
capture = PacketCapture('can0')
capture.start()
packets = capture.capture_duration(seconds=30)
analyzer = TrafficAnalyzer(packets)
periodic = analyzer.find_periodic_messages()
for msg_id, info in periodic.items():
print(f"ID: {hex(msg_id)}, Period: {info['period']}ms")
anomalies = analyzer.detect_anomalies()
for anomaly in anomalies:
print(f"Anomaly: {anomaly['type']} at {anomaly['timestamp']}")
Protocol Fuzzing
Automated fuzzing for vulnerability discovery:
from s800.fuzzing import ProtocolFuzzer
from s800.protocols import UDSProtocol
fuzzer = ProtocolFuzzer(
interface='can0',
protocol=UDSProtocol,
target_id=0x7E0
)
fuzzer.set_config({
'max_iterations': 10000,
'mutation_rate': 0.3,
'timeout': 1.0,
'crash_detection': True
})
results = fuzzer.fuzz_service(
service_id=0x27,
sub_function=0x01,
seed_data=[0x00, 0x00, 0x00, 0x00]
)
for finding in results.vulnerabilities:
print(f"Vulnerability: {finding['description']}")
print(f"Payload: {finding['payload'].hex()}")
print(f"Response: {finding['response'].hex()}")
UDS (Unified Diagnostic Services) Testing
Session Management
from s800.protocols.uds import UDSSession, SessionType
session = UDSSession(interface='can0', ecu_id=0x7E0)
session.start_session(SessionType.EXTENDED)
seed = session.request_seed(level=0x01)
print(f"Seed received: {seed.hex()}")
key = calculate_security_key(seed)
if session.send_key(level=0x01, key=key):
print("Security access granted")
data = session.read_data(identifier=0xF190)
print(f"VIN: {data.decode()}")
ECU Reprogramming Security
from s800.protocols.uds import Programmer
programmer = Programmer(interface='can0', ecu_id=0x7E0)
try:
programmer.request_download(
address=0x00100000,
size=0x10000,
format_identifier=0x00
)
print("WARNING: ECU accepts reprogramming without proper authentication!")
except Exception as e:
print(f"Programming blocked: {e}")
Configuration
Framework Configuration File
Create config.yaml:
s800:
interfaces:
primary: can0
backup: vcan0
network:
default_bitrate: 500000
extended_ids: false
fd_mode: false
scanner:
timeout: 10
retry_count: 3
ecu_range:
start: 0x700
end: 0x7FF
fuzzing:
max_iterations: 50000
crash_detection: true
mutation_strategies:
- bit_flip
- byte_flip
- arithmetic
- boundary
logging:
level: INFO
output: /var/log/s800/testing.log
capture_packets: true
Load configuration:
from s800.config import load_config
config = load_config('config.yaml')
interface = CANInterface(config['interfaces']['primary'])
Common Testing Patterns
Authentication Bypass Testing
from s800.tests import AuthenticationTest
auth_test = AuthenticationTest(interface='can0')
results = auth_test.test_seed_predictability(
ecu_id=0x7E0,
security_level=0x01,
samples=100
)
if results['predictable']:
print(f"WARNING: Seed generation is predictable!")
print(f"Entropy: {results['entropy']}")
results = auth_test.brute_force_key(
ecu_id=0x7E0,
security_level=0x01,
key_length=4,
max_attempts=10000
)
Replay Attack Testing
from s800.attacks import ReplayAttack
replay = ReplayAttack(interface='can0')
replay.start_capture()
replay.stop_capture()
success = replay.replay_sequence(delay=0.1)
if success:
print("WARNING: System vulnerable to replay attacks!")
CAN Bus Flooding
from s800.attacks import BusFlooding
flooder = BusFlooding(interface='can0')
flooder.flood_attack(
arbitration_id=0x000,
duration=10,
utilization=0.95
)
Traffic Capture and Logging
Persistent Capture
from s800.capture import ContinuousCapture
capture = ContinuousCapture(
interface='can0',
output_file='/tmp/can_capture.log',
max_size_mb=1000,
rotation=True
)
capture.start()
capture.stop()
statistics = capture.get_statistics()
print(f"Total messages: {statistics['total_messages']}")
print(f"Unique IDs: {statistics['unique_ids']}")
Environment Variables
The framework uses environment variables for sensitive configuration:
export S800_INTERFACE=can0
export S800_LOG_LEVEL=DEBUG
export S800_OUTPUT_DIR=/var/log/s800
export S800_ENABLE_HARDWARE_TESTS=false
Troubleshooting
CAN Interface Issues
from s800.diagnostics import InterfaceDiagnostics
diag = InterfaceDiagnostics()
status = diag.check_interface('can0')
if not status['operational']:
print(f"Interface error: {status['error']}")
if diag.repair_interface('can0'):
print("Interface repaired successfully")
Permission Errors
sudo usermod -a -G dialout $USER
sudo chmod 666 /dev/can*
sudo setcap cap_net_raw+ep $(which python3)
No ECU Response
from s800.diagnostics import BusMonitor
monitor = BusMonitor('can0')
activity = monitor.check_activity(duration=5)
if not activity['messages_detected']:
print("No bus activity detected")
print("Check: cable connections, bitrate, termination resistors")
else:
print(f"Bus active: {activity['message_rate']} msg/s")
Safety Warnings
IMPORTANT: This framework is for security research and authorized testing only.
- Always test on isolated networks or test benches
- Never test on active vehicles without authorization
- Be aware that improper testing can damage vehicle systems
- Follow responsible disclosure practices for discovered vulnerabilities