CVE-2017-0021 — CRITICAL (9.0)

Vulnerability 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.

CVSS Score

9.0

CRITICAL

CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Microsoft	Windows 10	1607
Microsoft	Windows Server 2016	All versions

References

http://www.securityfocus.com/bid/96020Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037999
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0021MitigationPatchVendor Advisory
http://www.securityfocus.com/bid/96020Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037999
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0021MitigationPatchVendor Advisory

FAQ

What is CVE-2017-0021?

CVE-2017-0021 is a vulnerability with a CVSS score of 9.0 (CRITICAL). 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 Stru...

How severe is CVE-2017-0021?

CVE-2017-0021 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2017-0021?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 10, Microsoft Windows Server 2016.