ghsa-hrvr-7x5w-xpmq
Vulnerability from github
Published
2024-06-27 21:32
Modified
2025-10-07 18:31
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
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).

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{
  "affected": [],
  "aliases": [
    "CVE-2024-5642"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-06-27T21:15:16Z",
    "severity": "MODERATE"
  },
  "details": "CPython 3.9 and earlier doesn\u0027t 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).",
  "id": "GHSA-hrvr-7x5w-xpmq",
  "modified": "2025-10-07T18:31:01Z",
  "published": "2024-06-27T21:32:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-5642"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/issues/121227"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/pull/23014"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/a2cdbb6e8188ba9ba8b356b28d91bff60e86fe31"
    },
    {
      "type": "WEB",
      "url": "https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html"
    },
    {
      "type": "WEB",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20240726-0005"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2024/06/28/4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}


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