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{"cveTags": [], "descriptions": [{"lang": "en", "value": "Bitcoin Core before 24.0.1 allows remote attackers to cause a denial of service (daemon crash) via a flood of low-difficulty header chains (aka a \"Chain Width Expansion\" attack) because a node does not first verify that a presented chain has enough work before committing to store it."}, {"lang": "es", "value": "Bitcoin Core anterior a 24.0.1 permite a atacantes remotos provocar una denegaci\u00f3n de servicio (falla del demonio) a trav\u00e9s de una inundaci\u00f3n de cadenas de encabezado de baja dificultad (tambi\u00e9n conocido como un ataque de \"expansi\u00f3n del ancho de la cadena\") porque un nodo no verifica primero que una cadena presentada tenga suficiente trabajo antes de comprometerse a almacenarla."}], "id": "CVE-2019-25220", "lastModified": "2024-11-18T17:35:01.780", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-11-18T04:15:04.107", "references": [{"source": "cve@mitre.org", "url": "https://bitcoincore.org/en/2024/09/18/disclose-headers-oom"}, {"source": "cve@mitre.org", "url": "https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures"}, {"source": "cve@mitre.org", "url": "https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-October/017354.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

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