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CVE-2021-3671

Estado: ModificadaMedia (6.5)—

A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.

CVSS

Probabilidad de explotación (EPSS)

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 (5)

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-3671",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
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          "confidentialityImpact": "NONE"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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          "attackComplexity": "LOW",
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  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "Samba",
          "versions": [
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              "status": "affected",
              "version": "Fixed in samba 4.13.12, samba 4.14.8"
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  "published": "2021-10-12T18:15:08.357",
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C",
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      "source": "secalert@redhat.com",
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      "value": "A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server."
    },
    {
      "lang": "es",
      "value": "Se ha encontrado una desreferencia de puntero null en la forma en que el servidor kerberos de Samba manejaba el sname faltante en TGS-REQ (Ticket Granting Server - Request). Un usuario autenticado podría usar este fallo para bloquear el servidor samba"
    }
  ],
  "lastModified": "2026-06-17T04:05:32.430",
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