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Windows 10 zero-day exploit can crash your system

Posted on Saturday, February 04 2017 @ 11:31:48 CET by

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There is a zero-day exploit for Windows 8.1 and Windows 10 that can be used to crash a fully patched system. This attack exploits a vulnerability in Windows's SMB network file sharing protocol, which is used to share files and printers over a network and to handle authentication to those shared resources.

ComputerWorld provides some details about how the attack works but it looks like it's a fairly tame security risk. At the moment, there appears to be no evidence that it can be used for anything else than serving you a Blue Screen of Death (BSOD).
An attacker can exploit the vulnerability by tricking a Windows system to connect to a malicious SMB server which would then send specially crafted responses. There are a number of techniques to force such SMB connections and some require little or no user interaction, CERT/CC warned.

The good news is that there are no confirmed reports of successful arbitrary code execution through this vulnerability yet. However, if this is a memory corruption issue as described by CERT/CC, code execution might be a possibility.
It's unknown when Microsoft will patch this flaw.



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