In computer security, a vulnerability is a weakness which allows an attacker to reduce a system’s information assurance.It’s clear that 2017 has been a year of high profile and wide reaching security vulnerabilities, with victims ranging from governments to Fortune 500 companies. While these vulnerabilities first became publicly known in 2017, they are likely to remain problems well into 2018, if not beyond. However, Protecting Your Business from Physical and Cyber Threats should always be a priority.
When joining a network, the WPA2 four-way handshake allows for the possibility of a dropped packet before the handshake is completed. The third step of the four-way handshake—in which the encryption key is negotiated—may be rebroadcast to the client if the access point has not received an acknowledgement. As such, the client may receive the encryption key multiple times, and is expected to reinstall that key, resetting the incremental packet transit number (“nonce”) and receive reply counter.
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EternalBlue and DoublePulsar
These include EternalBlue, a vulnerability in Microsoft’s implementation of the SMB1 protocol, allowing hackers to send maliciously coded packets which improperly grant them the ability to execute arbitrary code on a vulnerable computer. Relatively, DoublePulsar is a tool that allows attackers kernel-level access to Windows, and is used to load other malware.