CVE Published: 27/06/2024 |
CVE Updated: 06/11/2024 |
CVE Year: 2024 Source: PSF |
Vendor: Python Software Foundation |
Product: CPython Status : PUBLISHED
CVE-2024-5642 Description
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).