Security advisory

{
  "id": "43dca495c3e30d4c0b34265ae9f0c3072285545a913e7aa1803dbf326ca4bafa",
  "url": "https://osv.dev/vulnerability/CVE-2019-3807",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-3807",
    "summary": "An issue has been found in PowerDNS Recursor versions 4.1.x before 4.1.9 where records in the answer section of responses received from authoritative servers with the AA flag not set were not properly validated, allowing an attacker to bypass DNSSEC validation.",
    "evidence": "osv:CVE-2019-3807",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2019-3807",
      "aliases": [
        "CVE-2019-3807"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/powerdns/pdns",
              "type": "GIT",
              "events": [
                {
                  "introduced": "80da1b4773cbdad76755b01c70739059d6f607af"
                },
                {
                  "last_affected": "e412a949491886c13854587bbd06fa90ceb3a326"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.1.0"
                      },
                      {
                        "last_affected": "4.1.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "rec-4.1.8",
            "rec-4.1.7",
            "rec-4.1.6",
            "rec-4.1.5",
            "rec-4.1.4",
            "rec-4.1.3",
            "rec-4.1.2",
            "rec-4.1.1",
            "rec-4.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-3807.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:45.600856949Z",
      "provider": "osv",
      "references": [
        "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2019-02.html",
        "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3807"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-3807",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 436147,
  "published_at": "2019-01-29T17:29:00.35+00:00"
}