fkie_cve-2025-48945
Vulnerability from fkie_nvd
Published
2025-06-20 20:15
Modified
2025-06-23 20:16
Severity ?
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
Impacted products
| Vendor | Product | Version |
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{
"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"
},
{
"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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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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