CVE-2008-1637

Estado: ModificadaMedia (6.8)—

PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2) UDP source port numbers, which makes it easier for remote attackers to poison a DNS cache, related to (a) algorithmic deficiencies in rand and random functions in external libraries, (b) use of a 32-bit seed value, and (c) choice of the time of day as the sole seeding information.

CVSS

Versión: 2.0
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Puntuación base: 6.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 3.96%
Percentil entre todas las CVEs puntuadas: 90
Fecha de la puntuación: 6/10/2026

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)

Powerdns — Recursor

CWE

CWE-189

Referencias

JSON original (NVD)

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{
  "id": "CVE-2008-1637",
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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  },
  "affected": [
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      "affectedData": [
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          "versions": [
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              "version": "n/a"
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  "published": "2008-04-02T17:44:00.000",
  "references": [
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      "description": [
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          "lang": "en",
          "value": "CWE-189"
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  "descriptions": [
    {
      "lang": "en",
      "value": "PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2) UDP source port numbers, which makes it easier for remote attackers to poison a DNS cache, related to (a) algorithmic deficiencies in rand and random functions in external libraries, (b) use of a 32-bit seed value, and (c) choice of the time of day as the sole seeding information."
    },
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      "lang": "es",
      "value": "PowerDNS Recursor anterior a 3.1.5 no emplea la suficiente aleatoriedad para calcular (1) los valores TRXID y (2) números de las fuentes de los puertos UDP; esto hace que sea más fácil a los atacantes remotos envenenar una caché de DNS relacionada con (a) deficiencias algorítmicas en las funciones rand y random de librerias externas, (b) uso de una semilla de 32-bit, y (3) elección del momento del día como la única semilla de información."
    }
  ],
  "lastModified": "2026-06-16T22:52:08.737",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BFBA9267-A53C-4D1E-95BE-B69BA5C03DF3",
              "versionEndIncluding": "3.1.4"
            }
          ],
          "operator": "OR"
        }
      ]
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}