Bluetooth Low Energy (BLE) is widely used in smartwatches, fitness trackers, smart locks, and other IoT devices. BLE protocol security vulnerabilities are among the most easily exploitable attack surfaces in IoT security.

Major BLE Attacks

Bleeding Bit: Broadcom chip RCE vulnerability. BlueBorne: Airborne injection without pairing required for infiltration. KNOB attack: Forcing pairings to use 1-byte entropy. BLE MITM: Relay attacks intercepting and tampering with BLE communication.

Protection Strategies

Use BLE 4.2+ LE Secure Connections. For device pairing, use OOB (Out-of-Band) authentication. For critical applications, use additional application-layer encryption. Regularly check device firmware updates.

Conclusion

The key to BLE security is incorporating security into considerations during the design phase, using BLE 5.0+ advanced security features rather than patching afterward.