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CVE-2025-24294

Estado: AplazadaAlta (7.5)—

The attack vector is a potential Denial of Service (DoS). The vulnerability is caused by an insufficient check on the length of a decompressed domain name within a DNS packet.

An attacker can craft a malicious DNS packet containing a highly compressed domain name. When the resolv library parses such a packet, the name decompression process consumes a large amount of CPU resources, as the library does not limit the resulting length of the name.

This resource consumption can cause the application thread to become unresponsive, resulting in a Denial of Service condition.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

DNS parsing vulnerability (AV:N, PR:N, UI:N) permite envío remoto de paquetes maliciosos sin autenticación. El consumo de CPU por descompresión ineficiente de nombres causa DoS de aplicación.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

CWE

Referencias

JSON original (NVD)

Mostrar
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-24294",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2025-07-15T13:48:11.171487Z"
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      {
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        "cvssData": {
          "scope": "UNCHANGED",
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/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"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "support@hackerone.com",
      "affectedData": [
        {
          "vendor": "Ruby",
          "product": "resolv",
          "versions": [
            {
              "status": "affected",
              "version": "0.2",
              "versionType": "custom",
              "lessThanOrEqual": "0.2.2"
            },
            {
              "status": "affected",
              "version": "0.3.0",
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  "published": "2025-07-12T04:15:46.683",
  "references": [
    {
      "url": "https://www.ruby-lang.org/en/news/2025/07/08/dos-resolv-cve-2025-24294/",
      "source": "support@hackerone.com"
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    {
      "url": "https://www.ruby-lang.org/en/news/2025/07/08/dos-resolv-cve-2025-24294/",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
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  "vulnStatus": "Deferred",
  "weaknesses": [
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      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
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  "descriptions": [
    {
      "lang": "en",
      "value": "The attack vector is a potential Denial of Service (DoS). The vulnerability is caused by an insufficient check on the length of a decompressed domain name within a DNS packet.\r\n\r\nAn attacker can craft a malicious DNS packet containing a highly compressed domain name. When the resolv library parses such a packet, the name decompression process consumes a large amount of CPU resources, as the library does not limit the resulting length of the name.\r\n\r\nThis resource consumption can cause the application thread to become unresponsive, resulting in a Denial of Service condition."
    },
    {
      "lang": "es",
      "value": "El vector de ataque es una posible denegación de servicio (DoS). La vulnerabilidad se debe a una verificación insuficiente de la longitud de un nombre de dominio descomprimido dentro de un paquete DNS. Un atacante puede manipular un paquete DNS malicioso que contenga un nombre de dominio muy comprimido. Cuando la librería resolv analiza dicho paquete, el proceso de descompresión del nombre consume una gran cantidad de recursos de CPU, ya que la librería no limita la longitud resultante del nombre. Este consumo de recursos puede provocar que el hilo de la aplicación deje de responder, lo que resulta en una condición de denegación de servicio."
    }
  ],
  "lastModified": "2026-06-17T08:58:30.603",
  "sourceIdentifier": "support@hackerone.com"
}