7.7
HIGH
CVE-2020-16894
Microsoft Windows NAT Privileged Guest Denial of Service Vulnerability
Description

<p>A denial of service vulnerability exists when Windows Network Address Translation (NAT) on a host server fails to properly validate input from a privileged user on a guest operating system. An attacker who successfully exploited the vulnerability could cause the host server to crash.</p> <p>To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application that causes a host machine to crash.</p> <p>The update addresses the vulnerability by modifying how Windows NAT accesses the host.</p>

INFO

Published Date :

Oct. 16, 2020, 11:15 p.m.

Last Modified :

Dec. 31, 2023, 8:15 p.m.

Remotely Exploitable :

Yes !

Impact Score :

4.0

Exploitability Score :

3.1
Affected Products

The following products are affected by CVE-2020-16894 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Microsoft windows_10
2 Microsoft windows_server_2016
3 Microsoft windows_10_1607
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-16894.

URL Resource
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16894 Patch Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-16894 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-16894 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Dec. 31, 2023

    Action Type Old Value New Value
    Changed Description A remote code execution vulnerability exists when Windows Network Address Translation (NAT) fails to properly handle UDP traffic, aka 'Windows NAT Remote Code Execution Vulnerability'. <p>A denial of service vulnerability exists when Windows Network Address Translation (NAT) on a host server fails to properly validate input from a privileged user on a guest operating system. An attacker who successfully exploited the vulnerability could cause the host server to crash.</p> <p>To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application that causes a host machine to crash.</p> <p>The update addresses the vulnerability by modifying how Windows NAT accesses the host.</p>
    Added CVSS V3.1 Microsoft Corporation AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
  • CWE Remap by [email protected]

    Jul. 21, 2021

    Action Type Old Value New Value
    Changed CWE CWE-20 NVD-CWE-noinfo
  • Initial Analysis by [email protected]

    Oct. 20, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:N/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
    Changed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16894 No Types Assigned https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16894 Patch, Vendor Advisory
    Added CWE NIST CWE-20
    Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:x64:* *cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-16894 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-16894 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.15 }} -0.38%

score

0.50767

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability