CVE-2017-0021

Hyper-V vSMB Remote Code Execution Vulnerability

CVE-2017-0021 is fixed in 4 products on 1 platform, first by KB4013429, released March 14, 2017. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent
CVSS
4.3
Critical
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0178
78th percentile

<p>A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate vSMB packet data. An attacker who successfully exploited these vulnerabilities could execute arbitrary code on a target operating system.</p> <p>To exploit these vulnerabilities, an attacker running inside a virtual machine could run a specially crafted application that could cause the Hyper-V host operating system to execute arbitrary code.</p> <p>The update addresses the vulnerabilities by correcting how Windows Hyper-V validates vSMB packet data.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Windows 10 Version 1607 for 32-bit Systems 14393.953 KB4013429 Mar 14, 2017
Windows 10 Version 1607 for x64-based Systems 14393.953 KB4013429 Mar 14, 2017
Windows Server 2016 14393.953 KB4013429 Mar 14, 2017
Windows Server 2016 (Server Core installation) 14393.953 KB4013429 Mar 14, 2017

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