{
  "cveId": "CVE-2019-9518",
  "url": "https://patchblox.com/security/cve/CVE-2019-9518",
  "summary": "CVE-2019-9518 is fixed in 31 products on 2 platforms, first by libnetty-java 1:4.1.7-4ubuntu0.1\u002Besm1, released August 12, 2019. It is not reported as exploited. Patch Radar priority: High.",
  "title": "HTTP/2 Server Denial of Service Vulnerability",
  "description": "\u003Cp\u003EA denial of service vulnerability exists in the HTTP/2 protocol stack (HTTP.sys) when HTTP.sys improperly parses specially crafted HTTP/2 requests. An attacker who successfully exploited the vulnerability could create a denial of service condition, causing the target system to become unresponsive.\u003C/p\u003E\n\u003Cp\u003ETo exploit this vulnerability, an unauthenticated attacker could send a specially crafted HTTP packet to a target system, causing the affected system to become nonresponsive.\u003C/p\u003E\n\u003Cp\u003EThe update addresses the vulnerability by modifying how the Windows HTTP protocol stack handles HTTP/2 requests. Note that the denial of service vulnerability would not allow an attacker to execute code or to elevate user rights.\u003C/p\u003E",
  "published": "2019-08-12T17:00:00Z",
  "severity": "Important",
  "cvss": 7.5,
  "epss": 0.25448,
  "epssPercentile": 0.97961,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-9518",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for 32-bit Systems",
      "fixedVersion": "14393.3144",
      "fix": "KB4512517",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512517",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "fixedVersion": "14393.3144",
      "fix": "KB4512517",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512517",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1703 for 32-bit Systems",
      "fixedVersion": "15063.1988",
      "fix": "KB4512507",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512507",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1703 for x64-based Systems",
      "fixedVersion": "15063.1988",
      "fix": "KB4512507",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512507",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for 32-bit Systems",
      "fixedVersion": "16299.1331",
      "fix": "KB4512516",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512516",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for ARM64-based Systems",
      "fixedVersion": "16299.1331",
      "fix": "KB4512516",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512516",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1709 for x64-based Systems",
      "fixedVersion": "16299.1331",
      "fix": "KB4512516",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512516",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for 32-bit Systems",
      "fixedVersion": "17134.950",
      "fix": "KB4512501",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512501",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for ARM64-based Systems",
      "fixedVersion": "17134.950",
      "fix": "KB4512501",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512501",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1803 for x64-based Systems",
      "fixedVersion": "17134.950",
      "fix": "KB4512501",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512501",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for 32-bit Systems",
      "fixedVersion": "17763.678",
      "fix": "KB4511553",
      "url": "https://patchblox.com/security/fix/microsoft/kb4511553",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for ARM64-based Systems",
      "fixedVersion": "17763.678",
      "fix": "KB4511553",
      "url": "https://patchblox.com/security/fix/microsoft/kb4511553",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.678",
      "fix": "KB4511553",
      "url": "https://patchblox.com/security/fix/microsoft/kb4511553",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for 32-bit Systems",
      "fixedVersion": "18362.295",
      "fix": "KB4512508",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512508",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for ARM64-based Systems",
      "fixedVersion": "18362.295",
      "fix": "KB4512508",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512508",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1903 for x64-based Systems",
      "fixedVersion": "18362.295",
      "fix": "KB4512508",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512508",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for 32-bit Systems",
      "fixedVersion": "10240.18305",
      "fix": "KB4512497",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512497",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 for x64-based Systems",
      "fixedVersion": "10240.18305",
      "fix": "KB4512497",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512497",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.3144",
      "fix": "KB4512517",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512517",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.3144",
      "fix": "KB4512517",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512517",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.678",
      "fix": "KB4511553",
      "url": "https://patchblox.com/security/fix/microsoft/kb4511553",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.678",
      "fix": "KB4511553",
      "url": "https://patchblox.com/security/fix/microsoft/kb4511553",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1803  (Server Core Installation)",
      "fixedVersion": "17134.950",
      "fix": "KB4512501",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512501",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1903 (Server Core installation)",
      "fixedVersion": "18362.295",
      "fix": "KB4512508",
      "url": "https://patchblox.com/security/fix/microsoft/kb4512508",
      "released": "2019-08-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libnetty-java",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:4.1.7-4ubuntu0.1\u002Besm1",
      "fix": "libnetty-java 1:4.1.7-4ubuntu0.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libnetty-java-1-4.1.7-4ubuntu0.1-esm1",
      "released": "2019-08-12T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nodejs",
      "release": "RHEL 8",
      "fixedVersion": "1:10.16.3-2.module\u002Bel8.0.0\u002B4214\u002B49953fda",
      "fix": "RHSA-2019:2925",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nodejs",
      "release": "ol 8",
      "fixedVersion": "1:10.14.1-1.module\u002Bel8.0.0\u002B5349\u002B4d6b561f",
      "fix": "ELSA-2019-2925",
      "url": "https://patchblox.com/security/fix/linux/elsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nodejs-devel",
      "release": "RHEL 8",
      "fixedVersion": "1:10.16.3-2.module\u002Bel8.0.0\u002B4214\u002B49953fda",
      "fix": "RHSA-2019:2925",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nodejs-devel",
      "release": "ol 8",
      "fixedVersion": "1:10.14.1-1.module\u002Bel8.0.0\u002B5349\u002B4d6b561f",
      "fix": "ELSA-2019-2925",
      "url": "https://patchblox.com/security/fix/linux/elsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nodejs-docs",
      "release": "RHEL 8",
      "fixedVersion": "1:10.16.3-2.module\u002Bel8.0.0\u002B4214\u002B49953fda",
      "fix": "RHSA-2019:2925",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nodejs-docs",
      "release": "ol 8",
      "fixedVersion": "1:10.14.1-1.module\u002Bel8.0.0\u002B5349\u002B4d6b561f",
      "fix": "ELSA-2019-2925",
      "url": "https://patchblox.com/security/fix/linux/elsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nodejs-nodemon",
      "release": "RHEL 8",
      "fixedVersion": "0:1.18.3-1.module\u002Bel8\u002B2632\u002B6c5111ed",
      "fix": "RHSA-2019:2925",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nodejs-nodemon",
      "release": "ol 8",
      "fixedVersion": "0:1.18.3-1.module\u002Bel8.0.0\u002B5349\u002B4d6b561f",
      "fix": "ELSA-2019-2925",
      "url": "https://patchblox.com/security/fix/linux/elsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nodejs-packaging",
      "release": "RHEL 8",
      "fixedVersion": "0:17-3.module\u002Bel8\u002B2873\u002Baa7dfd9a",
      "fix": "RHSA-2019:2925",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nodejs-packaging",
      "release": "ol 8",
      "fixedVersion": "0:17-3.module\u002Bel8.0.0\u002B5349\u002B4d6b561f",
      "fix": "ELSA-2019-2925",
      "url": "https://patchblox.com/security/fix/linux/elsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "npm",
      "release": "RHEL 8",
      "fixedVersion": "1:6.9.0-1.10.16.3.2.module\u002Bel8.0.0\u002B4214\u002B49953fda",
      "fix": "RHSA-2019:2925",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "npm",
      "release": "ol 8",
      "fixedVersion": "1:6.4.1-1.10.14.1.1.module\u002Bel8.0.0\u002B5349\u002B4d6b561f",
      "fix": "ELSA-2019-2925",
      "url": "https://patchblox.com/security/fix/linux/elsa-2019-2925",
      "released": "2019-09-30T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}