CVE-2020-1118 (GCVE-0-2020-1118)
Vulnerability from cvelistv5
Published
2020-05-21 22:53
Modified
2026-08-19 16:33
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- Denial of Service
Summary
A denial of service vulnerability exists in the Windows implementation of Transport Layer Security (TLS) when it improperly handles certain key exchanges. An attacker who successfully exploited the vulnerability could cause a target system to stop responding.
To exploit this vulnerability, a remote unauthenticated attacker could send a specially crafted request to a target system utilizing TLS 1.2 or lower, triggering the system to automatically reboot.
The update addresses the vulnerability by changing the way TLS key exchange messages are validated.
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T06:25:01.156Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1118"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"platforms": [
"ARM64-based Systems",
"x64-based Systems"
],
"product": "Windows 10 Version 1709",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"32-bit Systems"
],
"product": "Windows 10 Version 1709 for 32-bit Systems",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"32-bit Systems",
"ARM64-based Systems",
"x64-based Systems"
],
"product": "Windows 10 Version 1803",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"32-bit Systems",
"x64-based Systems"
],
"product": "Windows 10 Version 1809",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.17763.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"ARM64-based Systems"
],
"product": "Windows 10 Version 1809",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
},
{
"product": "Windows 10 Version 1903 for 32-bit Systems",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
},
{
"product": "Windows 10 Version 1903 for ARM64-based Systems",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
},
{
"product": "Windows 10 Version 1903 for x64-based Systems",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"32-bit Systems",
"ARM64-based Systems",
"x64-based Systems"
],
"product": "Windows 10 Version 1909",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server 2019",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.17763.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server 2019 (Server Core installation)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.17763.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server, version 1803 (Server Core Installation)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server, version 1903 (Server Core installation)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
},
{
"platforms": [
"x64-based Systems"
],
"product": "Windows Server, version 1909 (Server Core installation)",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "publication",
"status": "affected",
"version": "10.0.0",
"versionType": "custom"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_server_1803:*:*:*:*:*:*:*:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.17763.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:arm64:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.17763.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.17763.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:x86:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_server_1909:*:*:*:*:*:*:*:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_10:*:*:*:*:*:*:*:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:microsoft:windows_server_1903:*:*:*:*:*:*:*:*",
"versionEndExcluding": "publication",
"versionStartIncluding": "10.0.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"datePublic": "2020-05-12T14:00:00.000Z",
"descriptions": [
{
"lang": "en-US",
"value": "A denial of service vulnerability exists in the Windows implementation of Transport Layer Security (TLS) when it improperly handles certain key exchanges. An attacker who successfully exploited the vulnerability could cause a target system to stop responding.\nTo exploit this vulnerability, a remote unauthenticated attacker could send a specially crafted request to a target system utilizing TLS 1.2 or lower, triggering the system to automatically reboot.\nThe update addresses the vulnerability by changing the way TLS key exchange messages are validated."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.6,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en-US",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Denial of Service",
"lang": "en-US",
"type": "Impact"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:33:39.283Z",
"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"shortName": "microsoft"
},
"references": [
{
"name": "Microsoft Windows Transport Layer Security Denial of Service Vulnerability",
"tags": [
"vendor-advisory",
"patch"
],
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1118"
}
],
"title": "Microsoft Windows Transport Layer Security Denial of Service Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
"assignerShortName": "microsoft",
"cveId": "CVE-2020-1118",
"datePublished": "2020-05-21T22:53:14.000Z",
"dateReserved": "2019-11-04T00:00:00.000Z",
"dateUpdated": "2026-08-19T16:33:39.283Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…