FKIE_CVE-2025-48945

Vulnerability from fkie_nvd - Published: 2025-06-20 20:15 - Updated: 2025-06-23 20:16
Severity ?
8.2 (High) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
pycares is a Python module which provides an interface to c-ares. c-ares is a C library that performs DNS requests and name resolutions asynchronously. Prior to version 4.9.0, pycares is vulnerable to a use-after-free condition that occurs when a Channel object is garbage collected while DNS queries are still pending. This results in a fatal Python error and interpreter crash. The vulnerability has been fixed in pycares 4.9.0 by implementing a safe channel destruction mechanism.
References
security-advisories@github.comhttps://github.com/aio-libs/aiodns/commit/f259a6e3650555157af53ac2b39f2ff545321d55
security-advisories@github.comhttps://github.com/aio-libs/aiodns/releases/tag/v3.5.0
security-advisories@github.comhttps://github.com/saghul/pycares/commit/ebfd7d71eb8e74bc1057a361ea79a5906db510d4
security-advisories@github.comhttps://github.com/saghul/pycares/releases/tag/v4.9.0
security-advisories@github.comhttps://github.com/saghul/pycares/security/advisories/GHSA-5qpg-rh4j-qp35
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "pycares is a Python module which provides an interface to c-ares. c-ares is a C library that performs DNS requests and name resolutions asynchronously. Prior to version 4.9.0, pycares is vulnerable to a use-after-free condition that occurs when a Channel object is garbage collected while DNS queries are still pending. This results in a fatal Python error and interpreter crash. The vulnerability has been fixed in pycares 4.9.0 by implementing a safe channel destruction mechanism."
    },
    {
      "lang": "es",
      "value": "Pycares es un m\u00f3dulo de Python que proporciona una interfaz para c-ares. C-ares es una librer\u00eda de C que realiza solicitudes DNS y resoluciones de nombres de forma as\u00edncrona. En versiones anteriores a la 4.9.0, Pycares era vulnerable a una condici\u00f3n de use-after-free que se produce cuando un objeto de canal se recolecta como basura mientras las consultas DNS a\u00fan est\u00e1n pendientes. Esto provoca un error fatal de Python y un fallo del int\u00e9rprete. Esta vulnerabilidad se ha corregido en Pycares 4.9.0 mediante la implementaci\u00f3n de un mecanismo seguro de destrucci\u00f3n de canales."
    }
  ],
  "id": "CVE-2025-48945",
  "lastModified": "2025-06-23T20:16:21.633",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-06-20T20:15:33.570",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/aio-libs/aiodns/commit/f259a6e3650555157af53ac2b39f2ff545321d55"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/aio-libs/aiodns/releases/tag/v3.5.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/saghul/pycares/commit/ebfd7d71eb8e74bc1057a361ea79a5906db510d4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/saghul/pycares/releases/tag/v4.9.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/saghul/pycares/security/advisories/GHSA-5qpg-rh4j-qp35"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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