CVE-2017-0021

Description

Hyper-V in Microsoft Windows 10 1607 and Windows Server 2016 does not properly validate vSMB packet data, which allows attackers to execute arbitrary code on a target OS, aka "Hyper-V System Data Structure Vulnerability." This vulnerability is different from that described in CVE-2017-0095.

9.0

CVSS

Severity: Critical

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.63%

Vendor Advisory microsoft.com

Affected: Microsoft Corporation Hyper-V vSMB

References

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0021	patch vendor advisory mitigation
http://www.securitytracker.com/id/1037999	vdb entry
http://www.securityfocus.com/bid/96020	vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-0021?: CVE-2017-0021 has been scored as a critical severity vulnerability.
How to fix CVE-2017-0021?: To fix CVE-2017-0021, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-0021 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2017-0021 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-0021?: CVE-2017-0021 affects Microsoft Corporation Hyper-V vSMB.

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