CVE-2021-3737

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"confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2022-03-04T19:15:08.730", "references": [{"url": "https://bugs.python.org/issue44022", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1995162", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "source": "secalert@redhat.com"}, {"url": "https://github.com/python/cpython/pull/25916", "tags": ["Patch", "Third 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"af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://python-security.readthedocs.io/vuln/urllib-100-continue-loop.html", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://security.netapp.com/advisory/ntap-20220407-0009/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://ubuntu.com/security/CVE-2021-3737", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.oracle.com/security-alerts/cpujul2022.html", "tags": ["Patch", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-835"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-835"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability."}, {"lang": "es", "value": "Se ha encontrado un fallo en python. Una respuesta HTTP manejada inapropiadamente en el c\u00f3digo del cliente HTTP de python puede permitir a un atacante remoto, que controle el servidor HTTP, hacer que el script del cliente entre en un bucle infinito, consumiendo tiempo de CPU. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema"}], "lastModified": "2025-12-17T22:15:56.970", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "98AE93B0-882A-42C5-B3A4-8B4D810AB111", "versionEndExcluding": "3.6.14", "versionStartIncluding": "3.6.0"}, {"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "63D83236-D590-43D4-82C0-B0C656E02A29", "versionEndExcluding": "3.7.11", "versionStartIncluding": "3.7.0"}, {"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AEAFF8F2-FA7C-4FFA-B592-E37EF28D6B59", "versionEndExcluding": "3.8.11", "versionStartIncluding": "3.8.0"}, {"criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AB31E875-FA80-4218-A3F8-AAE776154BCE", "versionEndExcluding": "3.9.6", "versionStartIncluding": "3.9.0"}], 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