{"id":"BIT-python-2024-5642","summary":"Buffer overread when using an empty list with SSLContext.set_npn_protocols()","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).","aliases":["BIT-libpython-2024-5642","BIT-python-min-2024-5642","CVE-2024-5642","PSF-2024-6"],"modified":"2025-10-14T09:53:39.450Z","published":"2025-10-14T09:29:29.557Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"]},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/06/28/4"},{"type":"WEB","url":"https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e"},{"type":"WEB","url":"https://github.com/python/cpython/commit/a2cdbb6e8188ba9ba8b356b28d91bff60e86fe31"},{"type":"WEB","url":"https://github.com/python/cpython/issues/121227"},{"type":"WEB","url":"https://github.com/python/cpython/pull/23014"},{"type":"WEB","url":"https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html"},{"type":"WEB","url":"https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-5642"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20240726-0005/"}],"affected":[{"package":{"name":"python","ecosystem":"Bitnami","purl":"pkg:bitnami/python"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.9.24"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/python/BIT-python-2024-5642.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"}]}],"schema_version":"1.7.3"}