What is BlueSmacking?

BlueSmacking is a type of Denial of Service (DoS) attack that targets Bluetooth-enabled devices. It exploits vulnerabilities in the Bluetooth protocol to overwhelm the target device with a flood of connection requests, ultimately causing it to become unresponsive or crash.

Bluesmacking is a technique to DoS a Bluetooth device, it is possible by flooding the device with big L2CAP payloads.


Whether you’re a cybersecurity professional, a network administrator, or simply a curious enthusiast, understanding BlueSmack is crucial for safeguarding Bluetooth-enabled devices and maintaining network integrity.

L2CAP Protocol

BlueSmacking targets the Logical Link Control and Adaptation Protocol (L2CAP), which is responsible for managing communication between Bluetooth devices.

L2CAP allows higher-level protocols, such as RFCOMM (Serial Port Emulation) and SDP (Service Discovery Protocol), to transmit data over Bluetooth connections.

Connection Flood

In a BlueSmacking attack, the attacker sends a large number of connection requests to the target device’s L2CAP layer. These connection requests are typically crafted to exploit vulnerabilities or limitations in the Bluetooth stack of the target device.

Resource Exhaustion

The target device receives and processes each connection request, consuming valuable system resources in the process. As the volume of connection requests increases, the target device’s resources become overwhelmed, leading to degraded performance or a complete system crash.

How to BlueSmacking?

hciconfig -a
hciconfig hci0 up
hcitool scan
hcitool inq
sdptool browse <MAC>
l2ping <MAC>

How to prevent BlueSmacking?

Detecting BlueSmacking attacks can be challenging, as they often appear as legitimate Bluetooth connection attempts. However, network monitoring tools and intrusion detection systems may be able to detect unusual patterns of Bluetooth traffic indicative of an ongoing attack.

Mitigating attacks typically involves implementing robust security measures, such as filtering incoming Bluetooth connections, limiting the number of concurrent connections, and regularly patching known vulnerabilities in Bluetooth software and firmware.

CAPEC-666: BlueSmacking

Bluetooth Penetration Testing Fundamentals


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Bluetooth Hacking,

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