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CVE-2024-5642

MEDIUM
Published 2024-06-27T21:05:31.281Z
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CVSS Score

V3.1
6.5
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.005
probability
of exploitation in the wild

There is a 0.5% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.643
Higher than 64.3% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
LOW
Integrity
NONE
Availability
LOW

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).

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Python Software Foundation

CPython

Affected Versions:

0

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-hrvr-7x5w-xpmq

Advisory Details

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 Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2024-5642
WEB https://github.com/python/cpython/issues/121227
WEB https://github.com/python/cpython/pull/23014
WEB https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e
WEB https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html
WEB https://mail.python.org/archives/list/[email protected]/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ
WEB https://security.netapp.com/advisory/ntap-20240726-0005
WEB http://www.openwall.com/lists/oss-security/2024/06/28/4

Advisory provided by GitHub Security Advisory Database. Published: June 27, 2024, Modified: November 7, 2024

References

https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html
https://github.com/python/cpython/pull/23014
https://mail.python.org/archives/list/[email protected]/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/
https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e
http://www.openwall.com/lists/oss-security/2024/06/28/4
https://github.com/python/cpython/issues/121227
https://security.netapp.com/advisory/ntap-20240726-0005/
Published: 2024-06-27T21:05:31.281Z
Last Modified: 2025-02-13T17:54:23.641Z
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