CVE-2018-6923

Estado: ModificadaAlta (7.5)—
In FreeBSD before 11.1-STABLE, 11.2-RELEASE-p2, 11.1-RELEASE-p13, ip fragment reassembly code is vulnerable to a denial of service due to excessive system resource consumption. This issue can allow a remote attacker who is able to send an arbitrary ip fragments to cause the machine to consume excessive resources.
CVSS

Versión: 3.0
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 7.5
Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 4.01%
Percentil entre todas las CVEs puntuadas: 90
Fecha de la puntuación: 7/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)

Freebsd — Freebsd
CWE

CWE-400
Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2018-6923",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "secteam@freebsd.org",
      "affectedData": [
        {
          "vendor": "FreeBSD",
          "product": "FreeBSD",
          "versions": [
            {
              "status": "affected",
              "version": "All supported versions of FreeBSD."
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-09-04T18:29:00.610",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/105336",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secteam@freebsd.org"
    },
    {
      "url": "http://www.securitytracker.com/id/1041505",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secteam@freebsd.org"
    },
    {
      "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.asc",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "secteam@freebsd.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/105336",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1041505",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.asc",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In FreeBSD before 11.1-STABLE, 11.2-RELEASE-p2, 11.1-RELEASE-p13, ip fragment reassembly code is vulnerable to a denial of service due to excessive system resource consumption. This issue can allow a remote attacker who is able to send an arbitrary ip fragments to cause the machine to consume excessive resources."
    },
    {
      "lang": "es",
      "value": "En FreeBSD en versiones anteriores a la 11.1-STABLE, 11.2-RELEASE-p2 y 11.1-RELEASE-p13, el código de reensamblado de fragmentos de ip es vulnerable a una denegación de servicio (DoS) debido al consumo excesivo de recursos del sistema. Este problema puede permitir que un atacante remoto que pueda enviar fragmentos de ip arbitrarios haga que la máquina consuma demasiados recursos."
    }
  ],
  "lastModified": "2026-06-17T02:02:28.187",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:2.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "183667CA-6DF1-4BFB-AE32-9ABF55B7283A"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:3.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EE38C50A-81FE-412E-9717-3672FAE6A6F4"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:4.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D2019E0E-426B-43AF-8904-1B811AE171E8"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:4.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "55C5FC1A-1253-4390-A4FC-573BB14EA937"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:4.5:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "44308D13-D935-4FF8-AB52-F0E115ED1AD2"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:4.6:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9C001822-FDF8-497C-AC2C-B59A00E9ACD2"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:4.7:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B86C77AB-B8FF-4376-9B4E-C88417396F3D"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:4.8:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "441BE3A0-20F4-4972-B279-19B3DB5FA14D"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:4.9:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "00EAEA17-033A-4A50-8E39-D61154876D2F"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:4.10:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9FFD9D1C-A459-47AD-BC62-15631417A32F"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:4.11:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "582B9BF3-5BF1-44A3-A580-62F2D44FDD34"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:5.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "61EBA52A-2D8B-4FB5-866E-AE67CE1842E7"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:5.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4EE93350-92E6-4F5C-A14C-9993CFFDBCD4"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:5.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DD7C441E-444B-4DF5-8491-86805C70FB99"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:5.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D8A80E6A-6502-4A33-83BA-7DCC606D79AA"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:5.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AD85B1ED-1473-4C22-9E1E-53F07CF517E9"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:5.5:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7752D43D-64AF-474F-BFBB-2625A29C1B88"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:6.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1D2C79D5-D27F-4B08-A8DF-3E3AAF4E16A5"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:6.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F4416CBA-76B9-4051-B015-F1BE89517309"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:6.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9118B602-3FB6-4701-AC09-763DD48334BA"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:6.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F702C46F-CA02-4FA2-B7D6-C61C2C095679"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:6.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A4F7F02A-C845-40BF-8490-510A070000F3"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:7.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "47E0A416-733A-4616-AE08-150D67FCEA70"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:7.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "803EFA9F-B7CB-4511-B1C1-381170CA9A23"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:7.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F948527C-A01E-4315-80B6-47FACE18A34F"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:7.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1F25FB59-1E4F-4420-8482-8007FF5E2411"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:7.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0C94B745-BD27-423D-BBB6-A821CD9BC1C4"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:8.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3CF1F9EF-01AF-4708-AE02-765360AF3D66"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:8.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9899C87E-2C09-46AE-BC24-1ACF012784CA"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:8.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DD5ECA1A-D9B4-4ED7-95EC-684E7AA2B765"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:8.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "30C501A1-FE2D-41E7-A5DB-C61D8701B9B4"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:8.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5DB4C0E8-8E50-44B1-BE0C-4C261D9E9730"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:9.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E6BD5BFF-260A-4A9E-B0AA-C8B8386B154E"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:9.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D78E559A-430D-4D50-8A83-58A37D393471"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:9.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2C560926-7789-4052-819D-C36C43C9C61E"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:9.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "57052F01-8695-4C63-A947-7671375B9312"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:10.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CA79CE41-D873-4A4A-A20C-83EB8772E5FA"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:11.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "53E56F4F-B418-44DD-9C97-7276A4C58F3E"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:11.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C5753931-556B-4EEC-B510-751BA3613CE6"
            },
            {
              "criteria": "cpe:2.3:o:freebsd:freebsd:11.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F5288B41-ED07-487E-BECD-59978D0F0686"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secteam@freebsd.org"
}