KRACK attack

Recently, Mathy Vanhoef of imec-DistriNet, KU Leuven, discovered a serious weakness in WPA2 known as the Key Reinstallation AttaCK (or KRACK) attack. Their overview, Key Reinstallation Attacks: Breaking WPA2 by forcing nonce reuse, and research paper (Key Reinstallation Attacks: Forcing Nonce Reuse in WPA2, co-authored by Frank Piessens) have created quite a stir in our industry because the press touts that it “breaks Wi-Fi”.

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There have been numerous articles written about this vulnerability, and we won’t rehash them here. However, we want to take a moment to talk about how this relates to Kali Linux, from a defensive, testing, and detection standpoint.

Is Kali Linux Vulnerable?

From a defensive standpoint, if you’re keeping up with your Kali Linux rolling updates (via a simple “apt update && apt upgrade), you’re already patched against this vulnerability thanks to patches in wpasupplicant and hostapd (both at 2.4-1.1). To be entirely clear: an updated version of Kali Linux is not vulnerable to this attack. You are keeping your Kali Linux system up-to-date, aren’t you?

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How do I test for the Vulnerability?

Find out by clicking here.

KRACK attack

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