Vulnerability-Lookup

CVE-2024-5642 (GCVE-0-2024-5642)

Vulnerability from cvelistv5 – Published: 2024-06-27 21:05 – Updated: 2026-07-31 14:06

Title

Buffer overread when using an empty list with SSLContext.set_npn_protocols()

Summary

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).

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-06-28 13:47 UTC

CWE

CWE-noinfo Not enough information

Assigner

PSF CNA under the mitre root

CNA scorecard B 80/100 over 26 records in the last 180 days details

References

8 references

URL	Tags
https://jbp.io/2024/06/27/cve-2024-5535-openssl-m…	third-party-advisory
https://github.com/python/cpython/pull/23014	mitigation
https://mail.python.org/archives/list/security-an…	vendor-advisory
https://github.com/python/cpython/commit/39258d35…	patch
http://www.openwall.com/lists/oss-security/2024/06/28/4
https://github.com/python/cpython/issues/121227	issue-tracking
https://security.netapp.com/advisory/ntap-2024072…
https://github.com/python/cpython/commit/a2cdbb6e…	patch

Impacted products

1 product

Vendor	Product	Version	CPE status
Python Software Foundation	CPython	Affected: 0 , < 3.9.24 (python) Affected: 3.10.0a1 , < 3.10.0b1 (python)	guessed

Show details on NVD website

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              "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e"
            },
            {
              "url": "http://www.openwall.com/lists/oss-security/2024/06/28/4"
            },
            {
              "tags": [
                "issue-tracking"
              ],
              "url": "https://github.com/python/cpython/issues/121227"
            },
            {
              "url": "https://security.netapp.com/advisory/ntap-20240726-0005/"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/python/cpython/commit/a2cdbb6e8188ba9ba8b356b28d91bff60e86fe31"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Buffer overread when using an empty list with SSLContext.set_npn_protocols()",
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "assignerShortName": "PSF",
        "cveId": "CVE-2024-5642",
        "datePublished": "2024-06-27T21:05:31.281Z",
        "dateReserved": "2024-06-04T18:40:21.539Z",
        "dateUpdated": "2026-07-31T14:06:47.138Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

OESA-2025-2638 (CVE-2024-5642)

Vulnerability from osv_openeuler – Published: 2025-11-07 11:09 – Updated: 2026-08-06 11:09 – Source website

Summary

python3 security update

Details

Security Fix(es):

Severity

6.5 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2024-5642	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "python3-3.9.9-48.oe2203sp4.aarch64.rpm",
          "python3-debug-3.9.9-48.oe2203sp4.aarch64.rpm",
          "python3-debuginfo-3.9.9-48.oe2203sp4.aarch64.rpm",
          "python3-debugsource-3.9.9-48.oe2203sp4.aarch64.rpm",
          "python3-devel-3.9.9-48.oe2203sp4.aarch64.rpm",
          "python3-unversioned-command-3.9.9-48.oe2203sp4.aarch64.rpm"
        ],
        "noarch": [
          "python3-help-3.9.9-48.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "python3-3.9.9-48.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "python3-3.9.9-48.oe2203sp4.x86_64.rpm",
          "python3-debug-3.9.9-48.oe2203sp4.x86_64.rpm",
          "python3-debuginfo-3.9.9-48.oe2203sp4.x86_64.rpm",
          "python3-debugsource-3.9.9-48.oe2203sp4.x86_64.rpm",
          "python3-devel-3.9.9-48.oe2203sp4.x86_64.rpm",
          "python3-unversioned-command-3.9.9-48.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "python3",
        "purl": "pkg:rpm/openEuler/python3\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.9.9-48.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Security Fix(es):\n\nCPython 3.9 and earlier doesn\u0026apos;t disallow configuring an empty list (\u0026quot;[]\u0026quot;) 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).(CVE-2024-5642)",
  "id": "OESA-2025-2638",
  "modified": "2026-08-06T11:09:45Z",
  "published": "2025-11-07T11:09:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2638"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-5642"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python3 security update",
  "upstream": [
    "CVE-2024-5642"
  ]
}

OPENSUSE-SU-2024:14253-1

Vulnerability from csaf_opensuse - Published: 2024-08-09 00:00 - Updated: 2026-09-20 21:16

Summary

python39-3.9.19-6.1 on GA media

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2024-5642.

CVE-2024-5642

4.8 (Medium)


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

Recommended: 20 products

Open the full advisory

OPENSUSE-SU-2024:14256-1

Vulnerability from csaf_opensuse - Published: 2024-08-10 00:00 - Updated: 2026-09-20 21:16

Summary

python38-3.8.19-7.1 on GA media

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2024-5642.

CVE-2024-5642

4.8 (Medium)


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

Recommended: 20 products

Open the full advisory

RHSA-2025:23342

Vulnerability from csaf_opensuse - Published: 2025-12-18 13:21 - Updated: 2026-10-06 23:01

Summary

Red Hat Security Advisory: python3.9 security update

Severity

Moderate

Scope

4 vulnerabilities in this advisory, including CVE-2024-5642.

CVE-2024-5642

A vulnerability was found in Python/CPython that does not disallow configuring an empty list ("[]") for SSLContext.set_npn_protocols(), which is an invalid value for the underlying OpenSSL API. This issue results in a buffer over-read when NPN is used. See CVE -2024-5535 for OpenSSL for more information.

2.7 (Low)


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

Fixed: 67 products

https://access.redhat.com/errata/RHSA-2025:23342

Open the full advisory

RHSA-2025:23530

Vulnerability from csaf_opensuse - Published: 2025-12-18 01:35 - Updated: 2026-10-22 20:23

Summary

Red Hat Security Advisory: python39:3.9 security update

Severity

Important

Scope

12 vulnerabilities in this advisory, including CVE-2024-5642.

CVE-2024-5642

2.7 (Low)


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

Fixed: 229 products

https://access.redhat.com/errata/RHSA-2025:23530

Open the full advisory

RHSA-2026:0414

Vulnerability from csaf_redhat - Published: 2026-01-08 22:34 - Updated: 2026-10-21 08:59

Summary

Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage

Severity

Important

Scope

20 vulnerabilities in this advisory, including CVE-2024-5642.

CVE-2024-5642

2.7 (Low)


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

Fixed: 4 products

https://access.redhat.com/errata/RHSA-2026:0414

Open the full advisory

RHSA-2026:0685

Vulnerability from csaf_redhat - Published: 2026-01-15 10:02 - Updated: 2026-10-15 02:30

Summary

Red Hat Security Advisory: Red Hat Update Infrastructure 5 security update

Severity

Moderate

Scope

8 vulnerabilities in this advisory, including CVE-2024-5642.

CVE-2024-5642

2.7 (Low)


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

Fixed: 4 products

https://access.redhat.com/errata/RHSA-2026:0685

Open the full advisory

RHSA-2026:1652

Vulnerability from csaf_redhat - Published: 2026-02-02 02:51 - Updated: 2026-10-27 04:24

Summary

Red Hat Security Advisory: Red Hat Ceph Storage

Severity

Important

Scope

17 vulnerabilities in this advisory, including CVE-2024-5642.

CVE-2024-5642

2.7 (Low)


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

Fixed: 4 products Known not affected: 20 products

https://access.redhat.com/errata/RHSA-2026:1652

Open the full advisory

SSA-202008

Vulnerability from csaf_siemens - Published: 2025-12-09 00:00 - Updated: 2025-12-09 00:00

Summary

SSA-202008: Multiple Vulnerabilities in Ruggedcom Rox Before V2.17.0

Scope

83 vulnerabilities in this advisory, including CVE-2024-5642.

CVE-2024-5642

6.5 (Medium)


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

Known affected: 11 products

https://support.industry.siemens.com/cs/ww/en/view/109997648/

Open the full advisory

SUSE-SU-2024:3076-1

Vulnerability from csaf_suse - Published: 2024-09-02 14:41 - Updated: 2026-09-20 16:05

Summary

Security update for python39

Severity

Important

Scope

2 vulnerabilities in this advisory, including CVE-2024-5642.

CVE-2024-5642

4.8 (Medium)


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

Recommended: 344 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CVE-2024-5642 (GCVE-0-2024-5642)

OESA-2025-2638 (CVE-2024-5642)

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