CVE-2024-5642 (GCVE-0-2024-5642)
Vulnerability from cvelistv5
Published
2024-06-27 21:05
Modified
2025-10-09 18:36
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
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).
References
Impacted products
Vendor Product Version
Python Software Foundation CPython Version: 0
Version: 3.10.0a1
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 6.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-5642",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-06-28T13:47:34.169947Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "description": "CWE-noinfo Not enough information",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-06T20:14:30.590Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-01T21:18:06.642Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "third-party-advisory",
              "x_transferred"
            ],
            "url": "https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html"
          },
          {
            "tags": [
              "mitigation",
              "x_transferred"
            ],
            "url": "https://github.com/python/cpython/pull/23014"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/"
          },
          {
            "tags": [
              "patch",
              "x_transferred"
            ],
            "url": "https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2024/06/28/4"
          },
          {
            "tags": [
              "issue-tracking",
              "x_transferred"
            ],
            "url": "https://github.com/python/cpython/issues/121227"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20240726-0005/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "CPython",
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "versions": [
            {
              "lessThan": "3.9.24",
              "status": "affected",
              "version": "0",
              "versionType": "python"
            },
            {
              "lessThan": "3.10.0b1",
              "status": "affected",
              "version": "3.10.0a1",
              "versionType": "python"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "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 \u003cspan style=\"background-color: oklab(0.0852327 0.00000386313 0.00000170618 / 0.06);\"\u003eCVE\u003c/span\u003e\u003cspan style=\"background-color: oklab(0.0852327 0.00000386313 0.00000170618 / 0.06);\"\u003e-2024\u003c/span\u003e\u003cspan style=\"background-color: oklab(0.0852327 0.00000386313 0.00000170618 / 0.06);\"\u003e-5535\u003c/span\u003e 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).\u003cbr\u003e"
            }
          ],
          "value": "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)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-09T18:36:41.965Z",
        "orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "shortName": "PSF"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html"
        },
        {
          "tags": [
            "mitigation"
          ],
          "url": "https://github.com/python/cpython/pull/23014"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "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": "2025-10-09T18:36:41.965Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-5642\",\"sourceIdentifier\":\"cna@python.org\",\"published\":\"2024-06-27T21:15:16.070\",\"lastModified\":\"2025-10-07T17:15:32.573\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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).\"},{\"lang\":\"es\",\"value\":\"CPython 3.9 y versiones anteriores no permiten la configuraci\u00f3n de una lista vac\u00eda (\\\"[]\\\") para SSLContext.set_npn_protocols(), que es un valor no v\u00e1lido para la API OpenSSL subyacente. Esto da como resultado una lectura excesiva del b\u00fafer cuando se utiliza NPN (consulte CVE-2024-5535 para OpenSSL). Esta vulnerabilidad es de baja gravedad debido a que NPN no se usa ampliamente y especificar una lista vac\u00eda probablemente sea poco com\u00fan en la pr\u00e1ctica (normalmente se configurar\u00eda un nombre de protocolo).\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":3.9,\"impactScore\":2.5}]},\"references\":[{\"url\":\"http://www.openwall.com/lists/oss-security/2024/06/28/4\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/commit/a2cdbb6e8188ba9ba8b356b28d91bff60e86fe31\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/issues/121227\",\"source\":\"cna@python.org\"},{\"url\":\"https://github.com/python/cpython/pull/23014\",\"source\":\"cna@python.org\"},{\"url\":\"https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html\",\"source\":\"cna@python.org\"},{\"url\":\"https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/\",\"source\":\"cna@python.org\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20240726-0005/\",\"source\":\"cna@python.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/06/28/4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://github.com/python/cpython/issues/121227\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://github.com/python/cpython/pull/23014\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20240726-0005/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html\", \"tags\": [\"third-party-advisory\", \"x_transferred\"]}, {\"url\": \"https://github.com/python/cpython/pull/23014\", \"tags\": [\"mitigation\", \"x_transferred\"]}, {\"url\": \"https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e\", \"tags\": [\"patch\", \"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/06/28/4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.com/python/cpython/issues/121227\", \"tags\": [\"issue-tracking\", \"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240726-0005/\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-01T21:18:06.642Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"LOW\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-5642\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-28T13:47:34.169947Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-28T13:47:40.782Z\"}}], \"cna\": {\"title\": \"Buffer overread when using an empty list with SSLContext.set_npn_protocols()\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"affected\": [{\"repo\": \"https://github.com/python/cpython\", \"vendor\": \"Python Software Foundation\", \"product\": \"CPython\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"3.9.24\", \"versionType\": \"python\"}, {\"status\": \"affected\", \"version\": \"3.10.0a1\", \"lessThan\": \"3.10.0b1\", \"versionType\": \"python\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://github.com/python/cpython/pull/23014\", \"tags\": [\"mitigation\"]}, {\"url\": \"https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e\", \"tags\": [\"patch\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/06/28/4\"}, {\"url\": \"https://github.com/python/cpython/issues/121227\", \"tags\": [\"issue-tracking\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240726-0005/\"}, {\"url\": \"https://github.com/python/cpython/commit/a2cdbb6e8188ba9ba8b356b28d91bff60e86fe31\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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).\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"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 \u003cspan style=\\\"background-color: oklab(0.0852327 0.00000386313 0.00000170618 / 0.06);\\\"\u003eCVE\u003c/span\u003e\u003cspan style=\\\"background-color: oklab(0.0852327 0.00000386313 0.00000170618 / 0.06);\\\"\u003e-2024\u003c/span\u003e\u003cspan style=\\\"background-color: oklab(0.0852327 0.00000386313 0.00000170618 / 0.06);\\\"\u003e-5535\u003c/span\u003e 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).\u003cbr\u003e\", \"base64\": false}]}], \"providerMetadata\": {\"orgId\": \"28c92f92-d60d-412d-b760-e73465c3df22\", \"shortName\": \"PSF\", \"dateUpdated\": \"2025-10-09T18:36:41.965Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-5642\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-09T18:36:41.965Z\", \"dateReserved\": \"2024-06-04T18:40:21.539Z\", \"assignerOrgId\": \"28c92f92-d60d-412d-b760-e73465c3df22\", \"datePublished\": \"2024-06-27T21:05:31.281Z\", \"assignerShortName\": \"PSF\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.