CVE-2016-6580

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:python:python_priority_library:1.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "1AD8F1D6-AFC5-4BAF-9E2E-58286ED8FA02", "vulnerable": true}, {"criteria": "cpe:2.3:a:python:python_priority_library:1.1.0:*:*:*:*:*:*:*", "matchCriteriaId": "C116405C-CC49-4664-AAD7-15E3549FA8BE", "vulnerable": true}, {"criteria": "cpe:2.3:a:python:python_priority_library:1.1.1:*:*:*:*:*:*:*", "matchCriteriaId": "6FB0D31F-B71D-4AD9-8D7B-1533018BF2B3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A HTTP/2 implementation built using any version of the Python priority library prior to version 1.2.0 could be targeted by a malicious peer by having that peer assign priority information for every possible HTTP/2 stream ID. The priority tree would happily continue to store the priority information for each stream, and would therefore allocate unbounded amounts of memory. Attempting to actually use a tree like this would also cause extremely high CPU usage to maintain the tree."}, {"lang": "es", "value": "Una implementaci\u00f3n HTTP/2 construida usando cualquier versi\u00f3n de la librer\u00eda de prioridad de Python anterior a la versi\u00f3n 1.2.0 podr\u00eda ser atacado por un par malicioso teniendo ese par informaci\u00f3n de prioridad de asignaci\u00f3n para cada posible ID de secuencia HTTP/2. El \u00e1rbol de prioridad continuar\u00eda felizmente almacenando la informaci\u00f3n de prioridad para cada secuencia, y por tanto asignar\u00eda cantidades ilimitadas de memoria. Tratar de utilizar realmente un \u00e1rbol como este provocar\u00eda tambi\u00e9n un uso extremadamente alto de la CPU para mantener el \u00e1rbol."}], "id": "CVE-2016-6580", "lastModified": "2026-06-17T00:51:24.140", "metrics": {"cvssMetricV2": [{"acInsufInfo": true, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-01-10T15:59:00.377", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/92311"}, {"source": "cve@mitre.org", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/92311"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-399"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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