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MicrosoftCVE-2020-16894

HistoryOct 16, 2020 - 11:15 p.m.

CVE-2020-16894

2020-10-1623:15:13

microsoft

web.nvd.nist.gov

cve-2020-16894

remote code execution

windows

nat

udp traffic

vulnerability

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:S/C:N/I:N/A:C

CVSS3

7.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

AI Score

7.7

Confidence

High

EPSS

0.001

Percentile

51.0%

JSON

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.
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.
The update addresses the vulnerability by modifying how Windows NAT accesses the host.

Affected configurations

Nvd

Vulners

Node

microsoftwindows_10Match1607x64

microsoftwindows_server_2016Match-

VendorProductVersionCPE
microsoftwindows_101607cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:x64:*
microsoftwindows_server_2016-cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
microsoft	windows_10	1607	cpe:2.3:o:microsoft:windows_10:1607::::::x64:
microsoft	windows_server_2016	-	cpe:2.3:o:microsoft:windows_server_2016:-:::::::*

CNA Affected

[
  {
    "vendor": "Microsoft",
    "product": "Windows 10 Version 1607",
    "cpes": [
      "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*"
    ],
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.0",
        "lessThan": "publication",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2016",
    "cpes": [
      "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*"
    ],
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.0",
        "lessThan": "publication",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2016 (Server Core installation)",
    "cpes": [
      "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*"
    ],
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.0",
        "lessThan": "publication",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  }
]

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16894

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:S/C:N/I:N/A:C

CVSS3

7.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

AI Score

7.7

Confidence

High

EPSS

0.001

Percentile

51.0%

JSON

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