Security Advisory

CVE-2024-5642

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2024-06-27 21:05:31

Last updated 2026-04-21 20:12:42

Assigner PSF

State PUBLISHED

Description

CPython 3.9 and earlier doesnt 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).

← Browse all CVEs View on cve.org ↗