{"id":"CVE-2020-16894","state":"PUBLISHED","title":"Windows NAT 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>\n<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>\n<p>The update addresses the vulnerability by modifying how Windows NAT accesses the host.</p>","publishedAt":"2020-10-16T22:17:38.000Z","updatedAt":"2024-10-01T15:56:51.725Z","severity":{"score":7.7,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C","source":"microsoft"},"assigner":"microsoft","products":["Microsoft Windows 10 Version 1607","Microsoft Windows Server 2016","Microsoft Windows Server 2016 (Server Core installation)"],"affected":[{"vendor":"Microsoft","product":"Windows 10 Version 1607","versions":[{"version":"10.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*"],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Windows Server 2016","versions":[{"version":"10.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*"],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Windows Server 2016 (Server Core installation)","versions":[{"version":"10.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*"],"platforms":["x64-based Systems"]}],"references":["https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16894"],"weaknesses":[],"ingestedAt":"2026-10-29T19:46:39.756Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/16xxx/CVE-2020-16894.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2020-16894","state":"PUBLISHED","datePublished":"2020-10-16T22:17:38.000Z","dateUpdated":"2024-10-01T15:56:51.725Z","assignerShortName":"microsoft","assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateReserved":"2020-08-04T00:00:00.000Z"},"containers":{"cna":{"title":"Windows NAT Denial of Service Vulnerability","descriptions":[{"lang":"en-US","value":"<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>\n<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>\n<p>The update addresses the vulnerability by modifying how Windows NAT accesses the host.</p>"}],"affected":[{"vendor":"Microsoft","product":"Windows 10 Version 1607","versions":[{"version":"10.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*"],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Windows Server 2016","versions":[{"version":"10.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*"],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Windows Server 2016 (Server Core installation)","versions":[{"version":"10.0.0","status":"affected","lessThan":"publication","versionType":"custom"}],"cpes":["cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*"],"platforms":["x64-based Systems"]}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16894","tags":["x_refsource_MISC"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"HIGH","baseScore":7.7,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C"}}],"problemTypes":[{"descriptions":[{"description":"Remote Code Execution","lang":"en-US","type":"Impact"}]}],"providerMetadata":{"shortName":"microsoft","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateUpdated":"2023-12-31T19:19:45.889Z"},"datePublic":"2020-10-13T07:00:00.000Z"},"adp":[{"title":"CVE Program Container","references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16894","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T13:45:34.397Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-02-27T17:10:36.835173Z","id":"CVE-2020-16894","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-10-01T15:56:51.725Z"}}]}}}