cvelistv5 - cve-2024-47874

cve-2024-47874

Vulnerability from cvelistv5

Published

2024-10-15 15:45

Modified

2024-11-21 16:53

Severity ?

8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Summary

Starlette Denial of service (DoS) via multipart/form-data

References

▼	URL	Tags
	security-advisories@github.com	https://github.com/encode/starlette/commit/fd038f3070c302bff17ef7d173dbb0b007617733
	security-advisories@github.com	https://github.com/encode/starlette/security/advisories/GHSA-f96h-pmfr-66vw

Impacted products

▼	Vendor	Product
	encode	starlette

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:encode:starlette:*:*:*:*:*:python:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "starlette",
            "vendor": "encode",
            "versions": [
              {
                "lessThan": "0.40.0",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-47874",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-10-15T16:23:43.595198Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-21T16:53:01.345Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "starlette",
          "vendor": "encode",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.40.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Starlette is an Asynchronous Server Gateway Interface (ASGI) framework/toolkit. Prior to version 0.40.0, Starlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette. This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests. Verison 0.40.0 fixes this issue."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-10-15T15:45:03.555Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/encode/starlette/security/advisories/GHSA-f96h-pmfr-66vw",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/encode/starlette/security/advisories/GHSA-f96h-pmfr-66vw"
        },
        {
          "name": "https://github.com/encode/starlette/commit/fd038f3070c302bff17ef7d173dbb0b007617733",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/encode/starlette/commit/fd038f3070c302bff17ef7d173dbb0b007617733"
        }
      ],
      "source": {
        "advisory": "GHSA-f96h-pmfr-66vw",
        "discovery": "UNKNOWN"
      },
      "title": "Starlette Denial of service (DoS) via multipart/form-data"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
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    "datePublished": "2024-10-15T15:45:03.555Z",
    "dateReserved": "2024-10-04T16:00:09.630Z",
    "dateUpdated": "2024-11-21T16:53:01.345Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-47874\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2024-10-15T16:15:05.260\",\"lastModified\":\"2024-10-16T16:38:43.170\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Starlette is an Asynchronous Server Gateway Interface (ASGI) framework/toolkit. Prior to version 0.40.0, Starlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette. This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests. Verison 0.40.0 fixes this issue.\"},{\"lang\":\"es\",\"value\":\"Starlette es un conjunto de herramientas/marco de interfaz de puerta de enlace de servidor asincr\u00f3nico (ASGI). Antes de la versi\u00f3n 0.40.0, Starlette trata las partes `multipart/form-data` sin un `filename` como campos de formulario de texto y las almacena en b\u00fafer en cadenas de bytes sin l\u00edmite de tama\u00f1o. Esto permite a un atacante cargar campos de formulario arbitrarios de gran tama\u00f1o y hacer que Starlette se ralentice significativamente debido a asignaciones de memoria excesivas y operaciones de copia, y tambi\u00e9n consuma cada vez m\u00e1s memoria hasta que el servidor comienza a intercambiar y se detiene, o el sistema operativo finaliza el proceso del servidor con un error OOM. Cargar m\u00faltiples solicitudes de este tipo en paralelo puede ser suficiente para dejar un servicio pr\u00e1cticamente inutilizable, incluso si se aplican l\u00edmites de tama\u00f1o de solicitud razonables mediante un proxy inverso frente a Starlette. Esta vulnerabilidad de denegaci\u00f3n de servicio (DoS) afecta a todas las aplicaciones creadas con Starlette (o FastAPI) que aceptan solicitudes de formulario. La versi\u00f3n 0.40.0 corrige este problema.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnerableSystemConfidentiality\":\"NONE\",\"vulnerableSystemIntegrity\":\"NONE\",\"vulnerableSystemAvailability\":\"HIGH\",\"subsequentSystemConfidentiality\":\"NONE\",\"subsequentSystemIntegrity\":\"NONE\",\"subsequentSystemAvailability\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirements\":\"NOT_DEFINED\",\"integrityRequirements\":\"NOT_DEFINED\",\"availabilityRequirements\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnerableSystemConfidentiality\":\"NOT_DEFINED\",\"modifiedVulnerableSystemIntegrity\":\"NOT_DEFINED\",\"modifiedVulnerableSystemAvailability\":\"NOT_DEFINED\",\"modifiedSubsequentSystemConfidentiality\":\"NOT_DEFINED\",\"modifiedSubsequentSystemIntegrity\":\"NOT_DEFINED\",\"modifiedSubsequentSystemAvailability\":\"NOT_DEFINED\",\"safety\":\"NOT_DEFINED\",\"automatable\":\"NOT_DEFINED\",\"recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\",\"baseScore\":8.7,\"baseSeverity\":\"HIGH\"}}],\"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:N/I:N/A:N\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\",\"baseScore\":0.0,\"baseSeverity\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":0.0}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-770\"}]}],\"references\":[{\"url\":\"https://github.com/encode/starlette/commit/fd038f3070c302bff17ef7d173dbb0b007617733\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/encode/starlette/security/advisories/GHSA-f96h-pmfr-66vw\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}

ghsa-f96h-pmfr-66vw

Vulnerability from github

Published

2024-10-15 18:12

Modified

2024-10-15 19:56

Severity ?

0.0 (None) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Summary

Starlette Denial of service (DoS) via multipart/form-data

Details

Summary

Starlette treats multipart/form-data parts without a filename as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette.

PoC

```python from starlette.applications import Starlette from starlette.routing import Route

async def poc(request): async with request.form(): pass

app = Starlette(routes=[ Route('/', poc, methods=["POST"]), ]) ```

sh curl http://localhost:8000 -F 'big=</dev/urandom'

Impact

This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests.

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "starlette"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.40.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-47874"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-10-15T18:12:57Z",
    "nvd_published_at": "2024-10-15T16:15:05Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nStarlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette.\n\n### PoC\n\n```python\nfrom starlette.applications import Starlette\nfrom starlette.routing import Route\n\nasync def poc(request):\n    async with request.form():\n        pass\n\napp = Starlette(routes=[\n    Route(\u0027/\u0027, poc, methods=[\"POST\"]),\n])\n```\n\n```sh\ncurl http://localhost:8000 -F \u0027big=\u003c/dev/urandom\u0027\n```\n\n### Impact\nThis Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests.\n",
  "id": "GHSA-f96h-pmfr-66vw",
  "modified": "2024-10-15T19:56:06Z",
  "published": "2024-10-15T18:12:57Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/encode/starlette/security/advisories/GHSA-f96h-pmfr-66vw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47874"
    },
    {
      "type": "WEB",
      "url": "https://github.com/encode/starlette/commit/fd038f3070c302bff17ef7d173dbb0b007617733"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/encode/starlette"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Starlette Denial of service (DoS) via multipart/form-data"
}

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.
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.

Action not permitted

cve-2024-47874

Vulnerability from cvelistv5

ghsa-f96h-pmfr-66vw

Vulnerability from github

Summary

PoC

Impact

Tags

Sightings

Nomenclature