CVE catalog

CVE-2006-4251

pdns-recursor affected and fixed versions

[CVE catalog]

Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute arbitrary code via a malformed TCP DNS query that prevents Recursor from properly calculating the TCP DNS query length.

Severity
Medium
Published
Source
[NVD] · [CVE record]
EPSS
8.79% · 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-securitypdns4.9.18-0+deb13u1Fixed[CVE-2006-4251]
Debiantrixie-securitypdns-recursor5.2.13-0+deb13u1Fixed[CVE-2006-4251]
Debiantrixiepdns2.9.20-4FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debiantrixiepdns4.9.17-0+deb13u1Fixed[CVE-2006-4251]
Debiantrixiepdns-recursor3.1.4-1FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debiantrixiepdns-recursor5.2.13-0+deb13u1Fixed[CVE-2006-4251]
Debiansidpdns2.9.20-4FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debiansidpdns5.1.5-1Fixed[CVE-2006-4251]
Debiansidpdns-recursor3.1.4-1FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debiansidpdns-recursor5.4.9-1Fixed[CVE-2006-4251]
Debianforkypdns2.9.20-4FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debianforkypdns5.1.5-1Fixed[CVE-2006-4251]

Showing 12 fix observations. All 19 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence
Distribution / releasePackageVersionStatusSource
Debianbookwormpdns2.9.20-4FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debianbookwormpdns4.7.3-2Fixed[CVE-2006-4251]
Debianbookwormpdns-recursor3.1.4-1FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debianbookwormpdns-recursor4.8.8-1+deb12u1Fixed[CVE-2006-4251]
Debianbookworm-securitypdns-recursor4.8.8-1+deb12u1Fixed[CVE-2006-4251]
Debianforkypdns2.9.20-4FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debianforkypdns5.1.5-1Fixed[CVE-2006-4251]
Debianforkypdns-recursor3.1.4-1FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debianforkypdns-recursor5.4.8-1Fixed[CVE-2006-4251]
Debiansidpdns2.9.20-4FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debiansidpdns5.1.5-1Fixed[CVE-2006-4251]
Debiansidpdns-recursor3.1.4-1FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debiansidpdns-recursor5.4.9-1Fixed[CVE-2006-4251]
Debiantrixiepdns2.9.20-4FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debiantrixiepdns4.9.17-0+deb13u1Fixed[CVE-2006-4251]
Debiantrixiepdns-recursor3.1.4-1FixedDistribution-reported fixed boundary[CVE-2006-4251]
Debiantrixiepdns-recursor5.2.13-0+deb13u1Fixed[CVE-2006-4251]
Debiantrixie-securitypdns4.9.18-0+deb13u1Fixed[CVE-2006-4251]
Debiantrixie-securitypdns-recursor5.2.13-0+deb13u1Fixed[CVE-2006-4251]
Original provider fields
{
  "package_releases": [
    {
      "name": "pdns",
      "status": "fixed",
      "release": "sid",
      "version": "5.1.5-1"
    },
    {
      "name": "pdns",
      "status": "fixed",
      "release": "forky",
      "version": "5.1.5-1"
    },
    {
      "name": "pdns",
      "status": "fixed",
      "release": "trixie",
      "version": "4.9.17-0+deb13u1"
    },
    {
      "name": "pdns",
      "status": "fixed",
      "release": "trixie-security",
      "version": "4.9.18-0+deb13u1"
    },
    {
      "name": "pdns",
      "status": "fixed",
      "release": "bookworm",
      "version": "4.7.3-2"
    },
    {
      "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",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "2.9.20-4"
    },
    {
      "bug": null,
      "name": "pdns",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "2.9.20-4"
    },
    {
      "bug": null,
      "name": "pdns",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "2.9.20-4"
    },
    {
      "bug": null,
      "name": "pdns",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "2.9.20-4"
    },
    {
      "bug": 398557,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "high",
      "fixed_version": "3.1.4-1"
    },
    {
      "bug": 398557,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "high",
      "fixed_version": "3.1.4-1"
    },
    {
      "bug": 398557,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "high",
      "fixed_version": "3.1.4-1"
    },
    {
      "bug": 398557,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "high",
      "fixed_version": "3.1.4-1"
    }
  ],
  "distribution_packages": []
}

[Debian bug #398557]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [pdns-backend-bind]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-backend-geoip]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-backend-ldap]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-backend-lmdb]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-backend-lua2]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-backend-mysql]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-backend-odbc]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-backend-pgsql]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-backend-pipe]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-backend-remote]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-backend-sqlite3]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-backend-tinydns]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-ixfrdist]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-recursor]Unknown
    Details (4)

    • 4.8.8-1+deb12u1 · amd64 · bookworm

      Fixed · Fixed: 3.1.4-1

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

    • 4.8.8-1+deb12u1 · arm64 · bookworm

      Fixed · Fixed: 3.1.4-1

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

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

      Fixed · Fixed: 3.1.4-1

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

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

      Fixed · Fixed: 3.1.4-1

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

  • [pdns-server]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

  • [pdns-tools]Unknown

    Source package: [pdns]

    Details (2)

    • 4.7.3-2 · amd64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

    • 4.7.3-2 · arm64 · bookworm

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · bookworm; dsa · pdns · debian · 12

[Debian 13 (Trixie)]

  • [pdns-backend-bind]Unknown

    Source package: [pdns]

    Details (4)

    • 4.9.16-0+deb13u1 · amd64 · trixie

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.16-0+deb13u1 · arm64 · trixie

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.17-0+deb13u1 · amd64 · trixie-security · Historical version

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.17-0+deb13u1 · arm64 · trixie-security

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

  • [pdns-backend-geoip]Unknown

    Source package: [pdns]

    Details (4)

    • 4.9.16-0+deb13u1 · amd64 · trixie

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.16-0+deb13u1 · arm64 · trixie

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.17-0+deb13u1 · amd64 · trixie-security · Historical version

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.17-0+deb13u1 · arm64 · trixie-security

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

  • [pdns-backend-ldap]Unknown

    Source package: [pdns]

    Details (4)

    • 4.9.16-0+deb13u1 · amd64 · trixie

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.16-0+deb13u1 · arm64 · trixie

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.17-0+deb13u1 · amd64 · trixie-security · Historical version

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.17-0+deb13u1 · arm64 · trixie-security

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

  • [pdns-backend-lmdb]Unknown

    Source package: [pdns]

    Details (4)

    • 4.9.16-0+deb13u1 · amd64 · trixie

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.16-0+deb13u1 · arm64 · trixie

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.17-0+deb13u1 · amd64 · trixie-security · Historical version

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

    • 4.9.17-0+deb13u1 · arm64 · trixie-security

      Fixed · Fixed: 2.9.20-4

      dsa · pdns · debian · 13

Next results

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]