Wireless Hacking Part -2

Wireless CTS/RTS Flooder

This module sends 802.11 CTS/RTS requests to a specific wireless peer, using the specified source address.

Module Options

ADDR_DST	TARGET MAC (e.g 00:DE:AD:BE:EF:00)
ADDR_SRC	Source MAC (not needed for CTS)
CHANNEL	The initial channel (default: 11)
DRIVER	The name of the wireless driver for lorcon (default: autodetect)
INTERFACE	The name of the wireless interface (default: wlan0)
NUM	Number of frames to send (default: 100)
TYPE	Type of Frame (RTS, CTS) (default: RTS)
VERBOSE	Enable detailed status messages
WORKSPACE	Specify the workspace for this module

Theory

RTS/CTS (Request to Send / Clear to Send) is the optional mechanism used by the 802.11 wireless networking protocol to reduce frame collisions introduced by the hidden node problem. Originally the protocol fixed the exposed node problem as well, but modern RTS/CTS includes ACKs and does not solve the exposed node problem.

A node wishing to send data initiates the process by sending a Request to Send frame (RTS). The destination node replies with a Clear To Send frame (CTS). Any other node receiving the RTS or CTS frame should refrain from sending data for a given time (solving the hidden node problem). The amount of time the node should wait before trying to get access to the medium is included in both the RTS and the CTS frame. This protocol was designed under the assumption that all nodes have the same transmission ranges.

RTS/CTS is an additional method to implement virtual carrier sensing in Carrier sense multiple access with collision avoidance (CSMA/CA). By default, 802.11 relies on physical carrier sensing only which is known to suffer from the hidden node problem.

Source Code Demystified:

In this auxiliary module a very large number of RTS and CTS packets are created and send to the wireless network in order to do denial of service attack.This will create the collision in the network and finally result in a denial of service.

As you can see below in the source code also two different packet rts and cts are create using the function create_rts and create_cts.

Demonstration

Attacker-1

Attacker-2

Attacker-3

Now lets look at victim machine:

Victim

Comments

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