Received
CVE has been recently published to the CVE List and has been received by the NVD.

Products

CPython

3.9 and earlier

Source

cna@python.org

CVE-2024-5642 details

Published : June 27, 2024, 9:15 p.m.
Last Modified : June 27, 2024, 10:15 p.m.

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).

CVSS Score

1	2	3	4	5	6	7	8	9	10

Weakness

Weakness	Name	Description

References

URL	Source
https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e	cna@python.org
https://github.com/python/cpython/pull/23014	cna@python.org
https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html	cna@python.org
https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/	cna@python.org

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CVE-2024-5642