{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2020-8621",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2020-8621",
    "idYear": 2020,
    "status": "PUBLISHED",
    "publishedAt": "2020-08-21T20:50:18.959Z",
    "updatedAt": "2024-09-16T16:18:00.777Z",
    "importedAt": "2026-10-24T01:56:21.187Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Attempting QNAME minimization after forwarding can lead to an assertion failure in resolver.c",
      "summary": "In BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is configured with both QNAME minimization and 'forward first' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that 'forward only' are not affected.",
      "affected": [
        {
          "vendor": "ISC",
          "product": "BIND9",
          "versions": [
            {
              "version": "9.14.0",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "*",
              "changes": [
                {
                  "at": "9.16.6",
                  "status": "unaffected"
                },
                {
                  "at": "9.17.0",
                  "status": "affected"
                },
                {
                  "at": "9.17.4",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}