FKIE_CVE-2018-6923

Vulnerability from fkie_nvd - Published: 2018-09-04 18:29 - Updated: 2026-06-17 02:02
Severity
7.5 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
secteam@freebsd.orghttp://www.securityfocus.com/bid/105336Third Party Advisory, VDB Entry
secteam@freebsd.orghttp://www.securitytracker.com/id/1041505Third Party Advisory, VDB Entry
secteam@freebsd.orghttps://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.ascMitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/105336Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1041505Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.ascMitigation, Vendor Advisory
Impacted products
Vendor Product Version
freebsd freebsd 2.2
freebsd freebsd 3.0
freebsd freebsd 4.3
freebsd freebsd 4.4
freebsd freebsd 4.5
freebsd freebsd 4.6
freebsd freebsd 4.7
freebsd freebsd 4.8
freebsd freebsd 4.9
freebsd freebsd 4.10
freebsd freebsd 4.11
freebsd freebsd 5.0
freebsd freebsd 5.1
freebsd freebsd 5.2
freebsd freebsd 5.3
freebsd freebsd 5.4
freebsd freebsd 5.5
freebsd freebsd 6.0
freebsd freebsd 6.1
freebsd freebsd 6.2
freebsd freebsd 6.3
freebsd freebsd 6.4
freebsd freebsd 7.0
freebsd freebsd 7.1
freebsd freebsd 7.2
freebsd freebsd 7.3
freebsd freebsd 7.4
freebsd freebsd 8.0
freebsd freebsd 8.1
freebsd freebsd 8.2
freebsd freebsd 8.3
freebsd freebsd 8.4
freebsd freebsd 9.0
freebsd freebsd 9.1
freebsd freebsd 9.2
freebsd freebsd 9.3
freebsd freebsd 10.0
freebsd freebsd 11.0
freebsd freebsd 11.1
freebsd freebsd 11.2
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "status": "affected",
              "version": "All supported versions of FreeBSD."
            }
          ]
        }
      ],
      "source": "secteam@freebsd.org"
    }
  ],
  "configurations": [
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  ],
  "cveTags": [],
  "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 c\u00f3digo de reensamblado de fragmentos de ip es vulnerable a una denegaci\u00f3n 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 m\u00e1quina consuma demasiados recursos."
    }
  ],
  "id": "CVE-2018-6923",
  "lastModified": "2026-06-17T02:02:28.187",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.8,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2018-09-04T18:29:00.610",
  "references": [
    {
      "source": "secteam@freebsd.org",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/105336"
    },
    {
      "source": "secteam@freebsd.org",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securitytracker.com/id/1041505"
    },
    {
      "source": "secteam@freebsd.org",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.asc"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/105336"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securitytracker.com/id/1041505"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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        "Vendor Advisory"
      ],
      "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.asc"
    }
  ],
  "sourceIdentifier": "secteam@freebsd.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.