Hacking: A Comprehensive, Step-By-Step Guide to Techniques and Strategies to Learn Ethical Hacking With Practical Examples to Computer Hacking, Wireless Network, Cybersecurity and Penetration Test by Peter Bradley

Author:Peter Bradley [Bradley, Peter]
Language: eng
Format: epub, pdf
Published: 2019-04-15T22:00:00+00:00

Denial of Service

Another kind of attack that WLANs are vulnerable to is the Denial of Service or DoS attacks. There are several ways that these attacks can be done, including disassociation attacks deauthentication attacks and CTS-RTS attacks, along with spectrum jamming or signal interference.

We’ll be looking at the deauthentication attack.

First, configure your Wireless Lab network so it has no encryption and uses Open Authentication. That way, we can use Wireshark to easily see the packets.

Next, we connect a Windows client and you should see that connection on the airodump-ng screen.

On the attack machine, we’ll run a directed deauthentication attack, using this command – airplay-ng -0 5 -a E8:94:F6:62:1E:8E -c AC:5F:3E:B3:3A:B0 –ignore-negative-one wlan0mon. You should be able to see that the client is immediately disconnected.

Looking at the traffic in Wireshark, we can see that many deauthentication packets were sent OTA.

Now we can replicate that attack. We’ll send a Broadcast deauthentication packet to the whole of the wireless network on behalf of our access point, which will disconnect every client that is connected. We use this command – aireplay-ng -0 5 -a E8:94:F6:62:1E:8E –ignore-negative-one wlan0mon

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