This past week there has been a lot of talk about a vulnerability in most implementations of WPA2 which could make it possible for attackers to break the encryption on wireless network traffic. The vulnerability was wide spread and affects most major desktop and mobile operating systems. The FreeBSD team has a good summary of the issue: "A vulnerability was found in how a number of implementations can be triggered to reconfigure WPA/WPA2/RSN keys (TK, GTK, or IGTK) by replaying a specific frame that is used to manage the keys. Such reinstallation of the encryption key can result in two different types of vulnerabilities: disabling replay protection and significantly reducing the security of encryption to the point of allowing frames to be decrypted or some parts of the keys to be determined by an attacker depending on which cipher is used. We are actively working on a patch for the base system to address these issues. Current users who use Wi-Fi with WPA2 should use a wired connection as a workaround, and we strongly recommend using end-to-end encryption methods like HTTPS or SSH to better protect against this type of attack."
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