{"dataType":"CVE_RECORD","cveMetadata":{"cveId":"CVE-2024-5642","assignerOrgId":"28c92f92-d60d-412d-b760-e73465c3df22","state":"PUBLISHED","assignerShortName":"PSF","dateReserved":"2024-06-04T18:40:21.539Z","datePublished":"2024-06-27T21:05:31.281Z","dateUpdated":"2026-04-21T20:12:42.468Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"CPython","repo":"https://github.com/python/cpython","vendor":"Python Software Foundation","versions":[{"version":"0","lessThan":"3.10.0b1","status":"affected","versionType":"python"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","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 <span style=\"background-color: oklab(0.0852327 0.00000386313 0.00000170618 / 0.06);\">CVE</span><span style=\"background-color: oklab(0.0852327 0.00000386313 0.00000170618 / 0.06);\">-2024</span><span style=\"background-color: oklab(0.0852327 0.00000386313 0.00000170618 / 0.06);\">-5535</span> 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).<br>"}],"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)."}],"providerMetadata":{"orgId":"28c92f92-d60d-412d-b760-e73465c3df22","shortName":"PSF","dateUpdated":"2026-04-21T20:12:42.468Z"},"references":[{"tags":["third-party-advisory"],"url":"https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html"},{"tags":["mitigation"],"url":"https://github.com/python/cpython/pull/23014"},{"tags":["vendor-advisory"],"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/"},{"tags":["patch"],"url":"https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e"},{"url":"http://www.openwall.com/lists/oss-security/2024/06/28/4"},{"tags":["issue-tracking"],"url":"https://github.com/python/cpython/issues/121227"},{"url":"https://security.netapp.com/advisory/ntap-20240726-0005/"},{"tags":["patch"],"url":"https://github.com/python/cpython/commit/a2cdbb6e8188ba9ba8b356b28d91bff60e86fe31"}],"source":{"discovery":"UNKNOWN"},"title":"Buffer overread when using an empty list with SSLContext.set_npn_protocols()","x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-noinfo Not enough information"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.5,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"LOW","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2024-06-28T13:47:34.169947Z","id":"CVE-2024-5642","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-11-06T20:14:30.590Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-01T21:18:06.642Z"},"title":"CVE Program Container","references":[{"tags":["third-party-advisory","x_transferred"],"url":"https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html"},{"tags":["mitigation","x_transferred"],"url":"https://github.com/python/cpython/pull/23014"},{"tags":["vendor-advisory","x_transferred"],"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/"},{"tags":["patch","x_transferred"],"url":"https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e"},{"url":"http://www.openwall.com/lists/oss-security/2024/06/28/4","tags":["x_transferred"]},{"tags":["issue-tracking","x_transferred"],"url":"https://github.com/python/cpython/issues/121227"},{"url":"https://security.netapp.com/advisory/ntap-20240726-0005/","tags":["x_transferred"]}]}]},"dataVersion":"5.2"}