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CVE-2024-25629

Estado: AnalizadaMedia (5.5)—

c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist.

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)

C-ares — C-aresFedoraproject — Fedora

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2024-25629",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-25629",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-02-23T19:18:11.897134Z"
        }
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    "cvssMetricV31": [
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          "version": "3.1",
          "baseScore": 4.4,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
        "exploitabilityScore": 0.8
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          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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          "product": "c-ares",
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  "published": "2024-02-23T15:15:09.237",
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      "tags": [
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    {
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      "tags": [
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      "tags": [
        "Mailing List"
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  "weaknesses": [
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      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
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          "value": "CWE-127"
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    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
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    {
      "lang": "en",
      "value": "c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist."
    },
    {
      "lang": "es",
      "value": "c-ares es una librería C para solicitudes DNS asincrónicas. `ares__read_line()` se usa para analizar archivos de configuración locales como `/etc/resolv.conf`, `/etc/nsswitch.conf`, el archivo `HOSTALIASES` y si se usa una versión de c-ares anterior a 1.27. 0, el archivo `/etc/hosts`. Si alguno de estos archivos de configuración tiene un carácter \"NULL\" incrustado como primer carácter en una nueva línea, puede provocar que se intente leer la memoria antes del inicio del búfer dado, lo que puede provocar un bloqueo. Este problema se solucionó en c-ares 1.27.0. No existen workarounds."
    }
  ],
  "lastModified": "2026-06-17T07:16:19.490",
  "configurations": [
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