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CVE-2020-6078

Estado: ModificadaAlta (7.5)—

An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages in mdns_recv, the return value of the mdns_read_header function is not checked, leading to an uninitialized variable usage that eventually results in a null pointer dereference, leading to service crash. An attacker can send a series of mDNS messages to trigger this vulnerability.

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 (2)

Debian — Debian LinuxVideolabs — Libmicrodns

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2020-6078",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "cvssData": {
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
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    "cvssMetricV31": [
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
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      "affectedData": [
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  "published": "2020-03-24T21:15:14.363",
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      "source": "talos-cna@cisco.com"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-252"
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      ]
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  "descriptions": [
    {
      "lang": "en",
      "value": "An exploitable denial-of-service vulnerability exists in the message-parsing functionality of Videolabs libmicrodns 0.1.0. When parsing mDNS messages in mdns_recv, the return value of the mdns_read_header function is not checked, leading to an uninitialized variable usage that eventually results in a null pointer dereference, leading to service crash. An attacker can send a series of mDNS messages to trigger this vulnerability."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de denegación de servicio explotable en la funcionalidad de análisis de mensajes de Videolabs libmicrodns versión 0.1.0. Cuando se analiza los mensajes mDNS en mdns_recv, el valor de retorno de la función mdns_read_header no es comprobado, conllevando a un uso de la variable no inicializada que finalmente resulta en una desreferencia del puntero null, conllevando a un bloqueo del servicio. Un atacante puede enviar una serie de mensajes mDNS para desencadenar esta vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T03:22:38.900",
  "configurations": [
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}