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CVE-2016-2123

Estado: ModificadaAlta (8.8)—

A flaw was found in samba versions 4.0.0 to 4.5.2. The Samba routine ndr_pull_dnsp_name contains an integer wrap problem, leading to an attacker-controlled memory overwrite. ndr_pull_dnsp_name parses data from the Samba Active Directory ldb database. Any user who can write to the dnsRecord attribute over LDAP can trigger this memory corruption. By default, all authenticated LDAP users can write to the dnsRecord attribute on new DNS objects. This makes the defect a remote privilege escalation.

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 (1)

Samba — Samba

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2016-2123",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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          "confidentialityImpact": "HIGH"
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    "cvssMetricV31": [
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        "type": "Primary",
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          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "[UNKNOWN]",
          "product": "samba",
          "versions": [
            {
              "status": "affected",
              "version": "versions 4.0.0 to 4.5.2"
            }
          ]
        }
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  ],
  "published": "2018-11-01T13:29:00.363",
  "references": [
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      "url": "http://www.securityfocus.com/bid/94970",
      "tags": [
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      "tags": [
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      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2123",
      "tags": [
        "Issue Tracking"
      ],
      "source": "secalert@redhat.com"
    },
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      "url": "https://www.samba.org/samba/security/CVE-2016-2123.html",
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        "Patch",
        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
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      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in samba versions 4.0.0 to 4.5.2. The Samba routine ndr_pull_dnsp_name contains an integer wrap problem, leading to an attacker-controlled memory overwrite. ndr_pull_dnsp_name parses data from the Samba Active Directory ldb database. Any user who can write to the dnsRecord attribute over LDAP can trigger this memory corruption. By default, all authenticated LDAP users can write to the dnsRecord attribute on new DNS objects. This makes the defect a remote privilege escalation."
    },
    {
      "lang": "es",
      "value": "Se ha encontrado un error en Samba, de la versión 4.0.0 a la 4.5.2. La rutina de Samba ndr_pull_dnsp_name contiene un problema de envoltorio de enteros que conduce a una sobrescritura de memoria controlada por el atacante. ndr_pull_dnsp_name analiza datos de la base de datos ldb Samba Active Directory. Cualquier usuario que pueda escribir en el atributo dnsRecord mediante LDAP puede desencadenar esta corrupción de memoria. Por defecto, todos los usuarios LDAP autenticados pueden escribir en el atributo dnsRecord en nuevos objetos DNS. Esto provoca un escalado de privilegios remotos."
    }
  ],
  "lastModified": "2026-06-17T00:43:30.210",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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}