CVE-2018-16853

Estado: ModificadaMedia (5.9)—

Samba from version 4.7.0 has a vulnerability that allows a user in a Samba AD domain to crash the KDC when Samba is built in the non-default MIT Kerberos configuration. With this advisory the Samba Team clarify that the MIT Kerberos build of the Samba AD DC is considered experimental. Therefore the Samba Team will not issue security patches for this configuration. Additionally, Samba 4.7.12, 4.8.7 and 4.9.3 have been issued as security releases to prevent building of the AD DC with MIT Kerberos unless --with-experimental-mit-ad-dc is specified to the configure command.

CVSS

Versión: 3.0
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.9

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 3.08%
Percentil entre todas las CVEs puntuadas: 87
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)

Samba — Samba

CWE

CWE-400
CWE-400

Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-16853",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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    "cvssMetricV30": [
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        "type": "Secondary",
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        "cvssData": {
          "scope": "UNCHANGED",
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          "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"
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        "exploitabilityScore": 3.9
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          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.2
      }
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  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "[UNKNOWN]",
          "product": "samba",
          "versions": [
            {
              "status": "affected",
              "version": "4.7.12"
            },
            {
              "status": "affected",
              "version": "4.8.7"
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              "status": "affected",
              "version": "4.9.3"
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  "published": "2018-11-28T14:29:00.533",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/106026",
      "tags": [
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        "VDB Entry"
      ],
      "source": "secalert@redhat.com"
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16853",
      "tags": [
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        "Third Party Advisory"
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      "source": "secalert@redhat.com"
    },
    {
      "url": "https://security.gentoo.org/glsa/202003-52",
      "source": "secalert@redhat.com"
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    {
      "url": "https://security.netapp.com/advisory/ntap-20181127-0001/",
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      "source": "secalert@redhat.com"
    },
    {
      "url": "https://www.samba.org/samba/security/CVE-2018-16853.html",
      "tags": [
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      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/106026",
      "tags": [
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      "tags": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-400"
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    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-400"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Samba from version 4.7.0 has a vulnerability that allows a user in a Samba AD domain to crash the KDC when Samba is built in the non-default MIT Kerberos configuration. With this advisory the Samba Team clarify that the MIT Kerberos build of the Samba AD DC is considered experimental. Therefore the Samba Team will not issue security patches for this configuration. Additionally, Samba 4.7.12, 4.8.7 and 4.9.3 have been issued as security releases to prevent building of the AD DC with MIT Kerberos unless --with-experimental-mit-ad-dc is specified to the configure command."
    },
    {
      "lang": "es",
      "value": "Samba, desde la versión 4.7.0, tiene una vulnerabilidad que permite que un usuario en el dominio Samba AD provoque el cierre inesperado del KDC cuando Samba se incluye en la configuración de MIT Kerberos que no es la predeterminada. Con este advisory, el equipo de Samba aclara que la build MIT Kerberos de Samba AC DC se considera experimental. Por lo tanto, el equipo de Samba no publicará parches de seguridad para esta configuración. Además, Samba 4.7.12, 4.8.7 y 4.9.3 se han publicado como versiones de seguridad para evitar que se incluya AD DC con MIT Kerberos, a menos que --with-experimental-mit-ad-dc se especifique en el comando configure."
    }
  ],
  "lastModified": "2026-06-17T01:44:54.880",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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}