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{"cveTags": [], "descriptions": [{"lang": "en", "value": "CPython 3.9 and earlier doesn't disallow configuring an empty list (\"[]\") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured)."}, {"lang": "es", "value": "CPython 3.9 y versiones anteriores no permiten la configuraci\u00f3n de una lista vac\u00eda (\"[]\") para SSLContext.set_npn_protocols(), que es un valor no v\u00e1lido para la API OpenSSL subyacente. Esto da como resultado una lectura excesiva del b\u00fafer cuando se utiliza NPN (consulte CVE-2024-5535 para OpenSSL). Esta vulnerabilidad es de baja gravedad debido a que NPN no se usa ampliamente y especificar una lista vac\u00eda probablemente sea poco com\u00fan en la pr\u00e1ctica (normalmente se configurar\u00eda un nombre de protocolo)."}], "id": "CVE-2024-5642", "lastModified": "2025-10-07T17:15:32.573", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-06-27T21:15:16.070", "references": [{"source": "cna@python.org", "url": "http://www.openwall.com/lists/oss-security/2024/06/28/4"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/commit/a2cdbb6e8188ba9ba8b356b28d91bff60e86fe31"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/issues/121227"}, {"source": "cna@python.org", "url": "https://github.com/python/cpython/pull/23014"}, {"source": "cna@python.org", "url": "https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html"}, {"source": "cna@python.org", "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/"}, {"source": "cna@python.org", "url": "https://security.netapp.com/advisory/ntap-20240726-0005/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2024/06/28/4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/python/cpython/issues/121227"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/python/cpython/pull/23014"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20240726-0005/"}], "sourceIdentifier": "cna@python.org", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "python: Invalid value for OpenSSL API may cause Buffer over-read when NPN is used", "id": "2294682", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2294682"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-20", "details": ["CPython 3.9 and earlier doesn't disallow configuring an empty list (\"[]\") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured).", "A vulnerability was found in Python/CPython that does not disallow configuring an empty list (\"[]\") for SSLContext.set_npn_protocols(), which is an invalid value for the underlying OpenSSL API. This issue results in a buffer over-read when NPN is used. See CVE -2024-5535 for OpenSSL for more information."], "name": "CVE-2024-5642", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "python3.12", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "python", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "python", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "python3", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "gimp:flatpak/python2", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "inkscape:flatpak/python2", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "python27:2.7/python2", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python3", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python3.11", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python3.12", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python36:3.6/python36", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python39:3.9/python39", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "python39-devel:3.9/python39", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "python3.11", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "python3.12", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "python3.9", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-06-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-5642\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-5642\nhttps://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/"], "statement": "This vulnerability is rated with a Low severity due to NPN not being widely used and specifying an empty list is likely uncommon in practice. Typically, a protocol name would be configured.", "threat_severity": "Low"}