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This sharing was introduced without considerations for do this sharing across separate threads but there was no indication of this fact in the documentation. Due to missing mutexes or thread locks, two threads sharing the same HSTS data could end up doing a double-free or use-after-free."}, {"lang": "es", "value": "Una vulnerabilidad de doble liberaci\u00f3n existe en libcurl anterior a 8.0.0 al compartir datos HSTS entre 'handles' separados. Esta compartici\u00f3n fue introducida sin considerar realizarla entre hilos separados, pero no hab\u00eda ninguna indicaci\u00f3n de este hecho en la documentaci\u00f3n. Debido a la falta de mutexes o bloqueos de hilos, dos hilos que compart\u00edan los mismos datos HSTS podr\u00edan terminar realizando una doble liberaci\u00f3n o un uso despu\u00e9s de liberaci\u00f3n."}], "id": "CVE-2023-27537", "lastModified": "2026-11-02T23:17:15.623", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-27537", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-02T22:31:59.814053Z", "version": "2.0.3"}}]}, "published": "2023-03-30T20:15:07.617", "references": [{"source": "support@hackerone.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://hackerone.com/reports/1897203"}, {"source": "support@hackerone.com", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202310-12"}, {"source": "support@hackerone.com", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20230420-0010/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://hackerone.com/reports/1897203"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202310-12"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20230420-0010/"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-398330.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-943925.html"}], "sourceIdentifier": "support@hackerone.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-415"}], "source": "support@hackerone.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-415"}], "source": "nvd@nist.gov", "type": "Primary"}]}