{
  "cveId": "CVE-2021-3672",
  "url": "https://patchblox.com/security/cve/CVE-2021-3672",
  "summary": "CVE-2021-3672 is fixed in 13 products on 2 platforms, first by libc-ares2 1.14.0-1ubuntu0.1, released August 9, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Node.js 14 and 2 others: A flaw was found in c-ares library, where a missing input validation check of host names returned by\u2026",
  "description": "A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.",
  "published": "2021-08-09T23:00:00Z",
  "severity": "Important",
  "cvss": 5.6,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
  "cwe": "CWE-79",
  "epss": 0.02814,
  "epssPercentile": 0.86619,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2021-3672",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Node.js 12",
      "fixedVersion": "12.22.5",
      "fix": "Node.js 12 12.22.5",
      "url": "https://patchblox.com/security/fix/windows-app/openjs.nodejs.12-12.22.5",
      "released": "2021-08-11T00:00:00Z"
    },
    {
      "platform": "windows-app",
      "product": "Node.js 14",
      "fixedVersion": "14.17.5",
      "fix": "Node.js 14 14.17.5",
      "url": "https://patchblox.com/security/fix/windows-app/openjs.nodejs.14-14.17.5",
      "released": "2021-08-11T00:00:00Z"
    },
    {
      "platform": "windows-app",
      "product": "Node.js 16",
      "fixedVersion": "16.6.2",
      "fix": "Node.js 16 16.6.2",
      "url": "https://patchblox.com/security/fix/windows-app/openjs.nodejs.16-16.6.2",
      "released": "2021-08-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.17.1-1.1",
      "fix": "DEBIAN-CVE-2021-3672",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-3672",
      "released": "2021-11-23T19:15:07Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.17.1-1.1",
      "fix": "DEBIAN-CVE-2021-3672",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-3672",
      "released": "2021-11-23T19:15:07Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "Debian 14",
      "fixedVersion": "1.17.1-1.1",
      "fix": "DEBIAN-CVE-2021-3672",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-3672",
      "released": "2021-11-23T19:15:07Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "RHEL 8",
      "fixedVersion": "0:1.13.0-6.el8",
      "fix": "RHSA-2022:2043",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-2043",
      "released": "2022-05-10T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "almalinux 8",
      "fixedVersion": "1.13.0-6.el8",
      "fix": "ALSA-2022:2043",
      "url": "https://patchblox.com/security/fix/linux/alsa-2022-2043",
      "released": "2022-05-10T08:14:29Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "ol 8",
      "fixedVersion": "0:1.13.0-6.el8",
      "fix": "ELSA-2022-2043",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-2043",
      "released": "2022-05-17T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "rocky 8",
      "fixedVersion": "0:1.13.0-6.el8",
      "fix": "RLSA-2022:2043",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2022-2043",
      "released": "2022-05-10T08:14:29Z"
    },
    {
      "platform": "linux",
      "product": "c-ares-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:1.13.0-6.el8",
      "fix": "RHSA-2022:2043",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-2043",
      "released": "2022-05-10T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "c-ares-devel",
      "release": "almalinux 8",
      "fixedVersion": "1.13.0-6.el8",
      "fix": "ALSA-2022:2043",
      "url": "https://patchblox.com/security/fix/linux/alsa-2022-2043",
      "released": "2022-05-10T08:14:29Z"
    },
    {
      "platform": "linux",
      "product": "c-ares-devel",
      "release": "ol 8",
      "fixedVersion": "0:1.13.0-6.el8",
      "fix": "ELSA-2022-2043",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-2043",
      "released": "2022-05-17T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libc-ares2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.14.0-1ubuntu0.1",
      "fix": "libc-ares2 1.14.0-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libc-ares2-1.14.0-1ubuntu0.1",
      "released": "2021-08-09T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libc-ares2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.15.0-1ubuntu0.1",
      "fix": "libc-ares2 1.15.0-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libc-ares2-1.15.0-1ubuntu0.1",
      "released": "2021-08-09T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libc-ares2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.17.1-1ubuntu1",
      "fix": "libc-ares2 1.17.1-1ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libc-ares2-1.17.1-1ubuntu1",
      "released": "2021-08-09T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "nodejs",
      "release": "RHEL 8",
      "fixedVersion": "1:14.17.5-1.module\u002Bel8.4.0\u002B12247\u002Be2879e58",
      "fix": "RHSA-2021:3666",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-3666",
      "released": "2021-09-27T00:00:00Z"
    },
    {
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      "product": "nodejs",
      "release": "ol 8",
      "fixedVersion": "1:14.17.5-1.module\u002Bel8.4.0\u002B20313\u002Bf90c2973",
      "fix": "ELSA-2021-3666",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-3666",
      "released": "2021-09-27T00:00:00Z"
    },
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      "release": "RHEL 8",
      "fixedVersion": "1:14.17.5-1.module\u002Bel8.4.0\u002B12247\u002Be2879e58",
      "fix": "RHSA-2021:3666",
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      "released": "2021-09-27T00:00:00Z"
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      "fixedVersion": "1:14.17.5-1.module\u002Bel8.4.0\u002B20313\u002Bf90c2973",
      "fix": "ELSA-2021-3666",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-3666",
      "released": "2021-09-27T00:00:00Z"
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      "fixedVersion": "1:14.17.5-1.module\u002Bel8.4.0\u002B12247\u002Be2879e58",
      "fix": "RHSA-2021:3666",
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      "released": "2021-09-27T00:00:00Z"
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      "released": "2021-09-27T00:00:00Z"
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      "fix": "RHSA-2021:3666",
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      "fix": "ELSA-2021-3666",
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      "released": "2021-09-27T00:00:00Z"
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      "fix": "RHSA-2021:3666",
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    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}