ubuntu-cve-2020-12244
Vulnerability from osv_ubuntu
Published
2020-05-19 12:00
Modified
2025-09-08 16:46
Summary
Details

An issue has been found in PowerDNS Recursor 4.1.0 through 4.3.0 where records in the answer section of a NXDOMAIN response lacking an SOA were not properly validated in SyncRes::processAnswer, allowing an attacker to bypass DNSSEC validation.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "pdns-recursor",
            "binary_version": "4.0.0~alpha2-2ubuntu0.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "pdns-recursor",
        "purl": "pkg:deb/ubuntu/pdns-recursor@4.0.0~alpha2-2ubuntu0.1+esm1?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.7.3-1",
        "4.0.0~alpha1-1",
        "4.0.0~alpha1-2",
        "4.0.0~alpha2-2",
        "4.0.0~alpha2-2ubuntu0.1",
        "4.0.0~alpha2-2ubuntu0.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "pdns-recursor",
            "binary_version": "4.1.1-2ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "pdns-recursor",
        "purl": "pkg:deb/ubuntu/pdns-recursor@4.1.1-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.0.6-1",
        "4.0.6-1build1",
        "4.0.7-1",
        "4.1.1-1",
        "4.1.1-1build1",
        "4.1.1-2",
        "4.1.1-2ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "pdns-recursor",
            "binary_version": "4.2.1-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "pdns-recursor",
        "purl": "pkg:deb/ubuntu/pdns-recursor@4.2.1-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.2.0-6",
        "4.2.1-1",
        "4.2.1-1build1",
        "4.2.1-1build2",
        "4.2.1-1ubuntu0.1~esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue has been found in PowerDNS Recursor 4.1.0 through 4.3.0 where records in the answer section of a NXDOMAIN response lacking an SOA were not properly validated in SyncRes::processAnswer, allowing an attacker to bypass DNSSEC validation.",
  "id": "UBUNTU-CVE-2020-12244",
  "modified": "2025-09-08T16:46:05Z",
  "published": "2020-05-19T12:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-12244"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2020/05/19/3"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-12244"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-12244"
  ]
}



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