PT-2017-1643 · Microsoft · Windows Server 2016+3

Jordan Rabet + 1 · Published 2017-03-14 · Updated 2019-10-03 · CVE-2017-0021

Positive Technologies (AI Summary)

CVSS v3.1

9.0

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Microsoft Windows 10 1607 Windows Server 2016

Description The issue is related to improper validation of vSMB packet data in Hyper-V, allowing attackers to execute arbitrary code on a target OS. It is also described as a vulnerability related to insufficient access control in the Hyper-V application of the Windows operating system, which can be exploited by a specially crafted application. The vulnerability enables remote attackers to execute arbitrary code and affect the system.

Recommendations For Microsoft Windows 10 1607, update to a version that includes the fix for this issue. For Windows Server 2016, apply the necessary patch or update to resolve the vulnerability. As a temporary workaround, consider restricting access to Hyper-V to minimize the risk of exploitation.

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

BDU:2017-00796

CVE-2017-0021

Affected Products

Hyper-V

Windows 10

Windows

Windows Server 2016

References · 8

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0021 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0021 · Security Note
• https://bdu.fstec.ru/vul/2017-00796 · Security Note
• https://osv.dev/vulnerability/CVE-2017-0021 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2017-0021 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-0021 · Security Note
• http://securitytracker.com/id/1037999 · Note
• http://securityfocus.com/bid/96020 · Note