This project contains scripts to tests if clients or access points (APs) are affected by the KRACK attack against WPA2. For details behind this attack see our website and the research paper.

Remember that our scripts are not attack scripts! You require network credentials in order to test if an access point or client is affected by the attack.

Prerequisites

Our scripts were tested on Kali Linux. To install the required dependencies on Kali, execute:

apt-get update
apt-get install libnl-3-dev libnl-genl-3-dev pkg-config libssl-dev net-tools git sysfsutils python-scapy python-pycryptodome

Then disable hardware encryption using the script ./disable-hwcrypto.sh. We tested our scripts on a Kali Linux distribution using a TP-Link WN722N v1.

Remember to disable Wi-Fi in your network manager before using our scripts. After disabling Wi-Fi, execute sudo rfkill unblock wifi so our scripts can still use Wi-Fi.

Testing Clients: detecting a vulnerable 4-way and group key handshake

To simulate an attack against a client follow the detailed instructions in krackattack/krack-test-client.py:

cd krackattack/
./krack-test-client.py --help

Now follow the detail instructions that the script outputs. The script assumes the client will use DHCP to get an IP. Remember to also perform extra tests using the --tptk and --tptk-rand parameters.

Testing Access Points: Detecting a vulnerable FT Handshake (802.11r)

The attached Linux script krack-ft-test.py can be used to determine if an AP is vulnerable to our attack. The script contains detailed documentation on how to use it:

cd krackattack/
./krack-ft-test.py --help

Now follow the detail instructions that the script outputs. Essentially, it wraps a normal wpa_supplicant client, and will keep replaying the FT Reassociation Request (making the AP reinstall the PTK).

Extra: Ubuntu 16.04

Our scripts are officially only supported on Kali Linux. Nevertheless, some users have been able to get it running on Ubuntu 16.04. These users remarked that the python-pycryptodome package is not present on Ubuntu, but can be installed as follows:

1. Install python-pip package
2. Execute pip install pycryptodomex

They further recommended to install this python module under a virtual python environment using virtualenv.