NSA leaked document about the BADDECISION hacking tool raises the doubt about National Security Agency knew the Krack attack since 2010. The leaked document said the hacking tool works for WPA/WPA2, suggesting that BaddECISION could bypass the encryption. The NSA did not comment the claims, but rumors that it knew something about the vulnerability in the WPA2 protocol are circulating in the intelligence community. Former NSA staffers cited by ZDNet the NSA exploit is a sort of Ettercap tool that conducts man-in-the-middle attacks.”]
Source: http://securityaffairs.co/wordpress/64601/hacking/krack-attack-nsa.html