CVE catalog

CVE-2020-12244

pdns-recursor affected and fixed versions

[CVE catalog]

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
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
Source
[NVD] · [CVE record]
EPSS
2.43% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / releasePackageVersionStatusSource
Debiantrixie-securitypdns-recursor5.2.13-0+deb13u1Fixed[CVE-2020-12244]
Debiantrixiepdns-recursor4.3.1-1FixedDistribution-reported fixed boundary[CVE-2020-12244]
Debiantrixiepdns-recursor5.2.13-0+deb13u1Fixed[CVE-2020-12244]
Debiansidpdns-recursor4.3.1-1FixedDistribution-reported fixed boundary[CVE-2020-12244]
Debiansidpdns-recursor5.4.9-1Fixed[CVE-2020-12244]
Debianforkypdns-recursor4.3.1-1FixedDistribution-reported fixed boundary[CVE-2020-12244]
Debianforkypdns-recursor5.4.8-1Fixed[CVE-2020-12244]
Debianbookworm-securitypdns-recursor4.8.8-1+deb12u1Fixed[CVE-2020-12244]
Debianbookwormpdns-recursor4.3.1-1FixedDistribution-reported fixed boundary[CVE-2020-12244]
Debianbookwormpdns-recursor4.8.8-1+deb12u1Fixed[CVE-2020-12244]

Showing 10 fix observations. All 15 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence
Distribution / releasePackageVersionStatusSource
Debianbookwormpdns-recursor4.3.1-1FixedDistribution-reported fixed boundary[CVE-2020-12244]
Debianbookwormpdns-recursor4.8.8-1+deb12u1Fixed[CVE-2020-12244]
Debianbookworm-securitypdns-recursor4.8.8-1+deb12u1Fixed[CVE-2020-12244]
Debianforkypdns-recursor4.3.1-1FixedDistribution-reported fixed boundary[CVE-2020-12244]
Debianforkypdns-recursor5.4.8-1Fixed[CVE-2020-12244]
Debiansidpdns-recursor4.3.1-1FixedDistribution-reported fixed boundary[CVE-2020-12244]
Debiansidpdns-recursor5.4.9-1Fixed[CVE-2020-12244]
Debiantrixiepdns-recursor4.3.1-1FixedDistribution-reported fixed boundary[CVE-2020-12244]
Debiantrixiepdns-recursor5.2.13-0+deb13u1Fixed[CVE-2020-12244]
Debiantrixie-securitypdns-recursor5.2.13-0+deb13u1Fixed[CVE-2020-12244]
Ubuntupropdns-recursor4.2.0-6UnknownSource applicability is not established[UBUNTU-CVE-2020-12244]
Ubuntupropdns-recursor4.2.1-1UnknownSource applicability is not established[UBUNTU-CVE-2020-12244]
Ubuntupropdns-recursor4.2.1-1build1UnknownSource applicability is not established[UBUNTU-CVE-2020-12244]
Ubuntupropdns-recursor4.2.1-1build2UnknownSource applicability is not established[UBUNTU-CVE-2020-12244]
Ubuntupropdns-recursor4.2.1-1ubuntu0.1~esm1UnknownSource applicability is not established[UBUNTU-CVE-2020-12244]
Original provider fields
{
  "package_releases": [
    {
      "name": "pdns-recursor",
      "status": "fixed",
      "release": "sid",
      "version": "5.4.9-1"
    },
    {
      "name": "pdns-recursor",
      "status": "fixed",
      "release": "forky",
      "version": "5.4.8-1"
    },
    {
      "name": "pdns-recursor",
      "status": "fixed",
      "release": "trixie",
      "version": "5.2.13-0+deb13u1"
    },
    {
      "name": "pdns-recursor",
      "status": "fixed",
      "release": "trixie-security",
      "version": "5.2.13-0+deb13u1"
    },
    {
      "name": "pdns-recursor",
      "status": "fixed",
      "release": "bookworm",
      "version": "4.8.8-1+deb12u1"
    },
    {
      "name": "pdns-recursor",
      "status": "fixed",
      "release": "bookworm-security",
      "version": "4.8.8-1+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "4.3.1-1"
    },
    {
      "bug": null,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "4.3.1-1"
    },
    {
      "bug": null,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "4.3.1-1"
    },
    {
      "bug": null,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "4.3.1-1"
    }
  ],
  "distribution_packages": [
    {
      "name": "pdns-recursor",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "4.2.0-6",
        "4.2.1-1",
        "4.2.1-1build1",
        "4.2.1-1build2",
        "4.2.1-1ubuntu0.1~esm1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-12244",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2020-12244",
      "provider_updated_at": "2025-09-08T16:46:05Z",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [pdns-recursor]Unknown
    Details (4)

    • 4.8.8-1+deb12u1 · amd64 · bookworm

      Fixed · Fixed: 4.3.1-1

      dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12

    • 4.8.8-1+deb12u1 · arm64 · bookworm

      Fixed · Fixed: 4.3.1-1

      dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12

    • 4.8.8-1+deb12u1 · amd64 · bookworm-security

      Fixed · Fixed: 4.3.1-1

      dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12

    • 4.8.8-1+deb12u1 · arm64 · bookworm-security

      Fixed · Fixed: 4.3.1-1

      dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12

[Debian 13 (Trixie)]

  • [pdns-recursor]Unknown
    Details (4)

    • 5.2.11-0+deb13u1 · amd64 · trixie

      Fixed · Fixed: 4.3.1-1

      dsa · pdns-recursor · debian · 13

    • 5.2.11-0+deb13u1 · arm64 · trixie

      Fixed · Fixed: 4.3.1-1

      dsa · pdns-recursor · debian · 13

    • 5.2.13-0+deb13u1 · amd64 · trixie-security

      Fixed · Fixed: 4.3.1-1

      dsa · pdns-recursor · debian · 13

    • 5.2.13-0+deb13u1 · arm64 · trixie-security

      Fixed · Fixed: 4.3.1-1

      dsa · pdns-recursor · debian · 13

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]