{
  "cveId": "CVE-2020-19861",
  "url": "https://patchblox.com/security/cve/CVE-2020-19861",
  "summary": "CVE-2020-19861 is fixed in 6 products on 1 platform, first by ldnsutils 1.7.0-3ubuntu4.1, released January 21, 2022. It is not reported as exploited. Patch Radar priority: High.",
  "title": "ldns: When a zone file in ldns 1.7.1 is parsed, the function ldns_nsec3_salt_data is too trusted for the length value obtai...",
  "description": "When a zone file in ldns 1.7.1 is parsed, the function ldns_nsec3_salt_data is too trusted for the length value obtained from the zone file. When the memcpy is copied, the 0xfe - ldns_rdf_size(salt_rdf) byte data can be copied, causing heap overflow information leakage.",
  "published": "2022-01-21T07:15:00Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "epss": 0.01493,
  "epssPercentile": 0.74297,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "ldns",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.8.1-1",
      "fix": "DEBIAN-CVE-2020-19861",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2020-19861",
      "released": "2022-01-21T15:15:07Z"
    },
    {
      "platform": "linux",
      "product": "ldns",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.8.1-1",
      "fix": "DEBIAN-CVE-2020-19861",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2020-19861",
      "released": "2022-01-21T15:15:07Z"
    },
    {
      "platform": "linux",
      "product": "ldns",
      "release": "Debian 14",
      "fixedVersion": "1.8.1-1",
      "fix": "DEBIAN-CVE-2020-19861",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2020-19861",
      "released": "2022-01-21T15:15:07Z"
    },
    {
      "platform": "linux",
      "product": "ldnsutils",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.7.0-3ubuntu4.1",
      "fix": "ldnsutils 1.7.0-3ubuntu4.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-ldnsutils-1.7.0-3ubuntu4.1",
      "released": "2022-01-21T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "ldnsutils",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.7.0-4.1ubuntu1\u002Besm1",
      "fix": "ldnsutils 1.7.0-4.1ubuntu1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-ldnsutils-1.7.0-4.1ubuntu1-esm1",
      "released": "2022-01-21T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "ldnsutils",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.7.1-2ubuntu4\u002Besm1",
      "fix": "ldnsutils 1.7.1-2ubuntu4\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-ldnsutils-1.7.1-2ubuntu4-esm1",
      "released": "2022-01-21T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libldns2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.7.0-3ubuntu4.1",
      "fix": "libldns2 1.7.0-3ubuntu4.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libldns2-1.7.0-3ubuntu4.1",
      "released": "2022-01-21T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libldns2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.7.0-4.1ubuntu1\u002Besm1",
      "fix": "libldns2 1.7.0-4.1ubuntu1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libldns2-1.7.0-4.1ubuntu1-esm1",
      "released": "2022-01-21T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libldns3",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.7.1-2ubuntu4\u002Besm1",
      "fix": "libldns3 1.7.1-2ubuntu4\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libldns3-1.7.1-2ubuntu4-esm1",
      "released": "2022-01-21T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-ldns",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.7.0-3ubuntu4.1",
      "fix": "python-ldns 1.7.0-3ubuntu4.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-ldns-1.7.0-3ubuntu4.1",
      "released": "2022-01-21T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python-ldns",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.7.0-4.1ubuntu1\u002Besm1",
      "fix": "python-ldns 1.7.0-4.1ubuntu1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python-ldns-1.7.0-4.1ubuntu1-esm1",
      "released": "2022-01-21T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-ldns",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.7.0-3ubuntu4.1",
      "fix": "python3-ldns 1.7.0-3ubuntu4.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python3-ldns-1.7.0-3ubuntu4.1",
      "released": "2022-01-21T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-ldns",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.7.0-4.1ubuntu1\u002Besm1",
      "fix": "python3-ldns 1.7.0-4.1ubuntu1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python3-ldns-1.7.0-4.1ubuntu1-esm1",
      "released": "2022-01-21T07:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-ldns",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.7.1-2ubuntu4\u002Besm1",
      "fix": "python3-ldns 1.7.1-2ubuntu4\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3-ldns-1.7.1-2ubuntu4-esm1",
      "released": "2022-01-21T07:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}