CVE-2025-0343

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Swift ASN1", "vendor": "Swift Project", "versions": [{"lessThan": "1.3.1", "status": "affected", "version": "1.0.0", "versionType": "semver"}]}], "source": "cve@forums.swift.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Swift ASN.1 can be caused to crash when parsing certain BER/DER constructions. This crash is caused by a confusion in the ASN.1 library itself which assumes that certain objects can only be provided in either constructed or primitive forms, and will trigger a preconditionFailure if that constraint isn't met.\n\nImportantly, these constraints are actually required to be true in DER, but that correctness wasn't enforced on the early node parser side so it was incorrect to rely on it later on in decoding, which is what the library did.\n\nThese crashes can be triggered when parsing any DER/BER format object. There is no memory-safety issue here: the crash is a graceful one from the Swift runtime. The impact of this is that it can be used as a denial-of-service vector when parsing BER/DER data from unknown sources, e.g. when parsing TLS certificates."}, {"lang": "es", "value": "Swift ASN.1 puede bloquearse al analizar ciertas construcciones BER/DER. Este bloqueo se debe a una confusi\u00f3n en la propia librer\u00eda ASN.1, que supone que ciertos objetos solo se pueden proporcionar en formas construidas o primitivas, y activar\u00e1 un error de condici\u00f3n previa si no se cumple esa restricci\u00f3n. Es importante destacar que, en realidad, se requiere que estas restricciones sean verdaderas en DER, pero esa correcci\u00f3n no se aplic\u00f3 en el lado del analizador del nodo inicial, por lo que fue incorrecto confiar en ella m\u00e1s adelante en la decodificaci\u00f3n, que es lo que hizo la librer\u00eda. Estos bloqueos se pueden activar al analizar cualquier objeto con formato DER/BER. No hay ning\u00fan problema de seguridad de la memoria aqu\u00ed: el bloqueo es elegante desde el entorno de ejecuci\u00f3n de Swift. El impacto de esto es que se puede usar como un vector de denegaci\u00f3n de servicio al analizar datos BER/DER de fuentes desconocidas, por ejemplo, al analizar certificados TLS."}], "id": "CVE-2025-0343", "lastModified": "2026-06-17T08:26:18.920", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-0343", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-01-15T14:55:10.749413Z", "version": "2.0.3"}}]}, "published": "2025-01-15T01:15:13.673", "references": [{"source": "cve@forums.swift.org", "url": "https://github.com/apple/swift-asn1/security/advisories/GHSA-w8xv-rwgf-4fwh"}], "sourceIdentifier": "cve@forums.swift.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-228"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

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