CVEvulnerability
CVE-2024-5642
6.5 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2024-06-27
- Last modified
- 2026-07-31
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
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).
References
- http://www.openwall.com/lists/oss-security/2024/06/28/4 www.openwall.com
- https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e github.com
- https://github.com/python/cpython/commit/a2cdbb6e8188ba9ba8b356b28d91bff60e86fe31 github.com
- https://github.com/python/cpython/issues/121227 github.com
- https://github.com/python/cpython/pull/23014 github.com
- https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html jbp.io
- https://mail.python.org/archives/list/[email protected]/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/ mail.python.org
- https://security.netapp.com/advisory/ntap-20240726-0005/ security.netapp.com
- http://www.openwall.com/lists/oss-security/2024/06/28/4 www.openwall.com
- https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e github.com
- https://github.com/python/cpython/issues/121227 github.com
- https://github.com/python/cpython/pull/23014 github.com
- https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html jbp.io
- https://mail.python.org/archives/list/[email protected]/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/ mail.python.org
- https://security.netapp.com/advisory/ntap-20240726-0005/ security.netapp.com