Wi-Fi WPA2 standard subject to KRACKS - key reinstallation attacks

Wi-Fi WPA2 standard subject to KRACKS - key reinstallation attacks

Researchers have discovered a glaring vulnerability in WiFi Protected Access 2 (WPA2) - a core encryption protocol used by WiFi users to keep their web activity private. A criminal using KRACK could theoretically sit in a parking lot outside a retailer and hop on a Wi-Fi network to download a stream of credit card numbers.

Protected networks are those that require a password to join. Those tools may emerge sooner rather than later, so if you're super concerned about this attack and updates are not yet available for your devices, perhaps the best approach in the short run is to connect any devices on your network to the router via an ethernet cable (assuming your device still has an ethernet port). A massive security disclosure details vulnerabilities in WPA2 that could let an attacker intercept all your precious data, and virtually every device with Wi-Fi is affected. This is important because the attack is apparently "exceptionally devastating against Linux and Android 6.0 or higher". Attackers can take advantage of this behavior to replay, decrypt, or forge packets. "VPN is created to protect users in totally insecure networks, so using a VPN will protect from this completely", said Niemelä. However, Vanhoef found that routers are harder to attack than phones and other devices. That includes Wi-Fi enabled devices such as Apple computers, iOS devices, Windows computers, and more. This vulnerability is stated as a serious vulnerability, allowing attackers to monitor traffic between computer and wireless network points.

This means that just changing your WiFi password is no defense against a KRACK attack.

Naturally, this ability extends to TCP SYN packets, making it possible for attackers to hijack TCP connections, in functionally the same way attackers inject data on unprotected Wi-Fi networks.

MR Vanhoef says he first alerted vendors to the flaw in July and August 2017.

The flaw is so widespread that confirmation from US Homeland Security's Cyber Emergency Unit US-CERT already began warning businesses that the bug existed two months ago was revealed by ZDNet.

As this vulnerability does not rely on a specific vendor implementation, practically any device with a specification-compliant implementation of WPA2 is affected.

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A Google spokesperson said to Forbes: "We're aware of the issue, and we will be patching any affected devices in the coming weeks".

"Instead, you should make sure all your devices are updated, and you should also update the firmware of your router".

Meanwhile, Microsoft said customers who have the latest Windows Update, launched last week, and applied the security updates, are automatically protected.

MikroTik said not all of the discovered vulnerabilities impact RouterOS, but added that it followed all recommendations and improved the key exchange process according to the guidelines it received from the security researcher. Unlike in past when older WiFi security protocols have been compromised, there is nothing to replace WPA2.

"In particular, accessing secure websites is still fine", he wrote.

Sounds great, but in practice a great many products on the CERT list are now designated "unknown" as to whether they are vulnerable to this flaw.

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