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CVE-2024-53981

Estado: AplazadaAlta (7.5)—

python-multipart is a streaming multipart parser for Python. When parsing form data, python-multipart skips line breaks (CR \r or LF \n) in front of the first boundary and any tailing bytes after the last boundary. This happens one byte at a time and emits a log event each time, which may cause excessive logging for certain inputs. An attacker could abuse this by sending a malicious request with lots of data before the first or after the last boundary, causing high CPU load and stalling the processing thread for a significant amount of time. In case of ASGI application, this could stall the event loop and prevent other requests from being processed, resulting in a denial of service (DoS). This vulnerability is fixed in 0.0.18.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vector CVSS AV:N/AC:L/PR:N/UI:N indica acceso remoto sin privilegios ni interacción (T1190). El ataque causa DoS por consumo de CPU en aplicaciones ASGI enviando datos malformados (T1499.004: application exhaustion).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Fastapiexpert — Python-multipartAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2024-53981",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-53981",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-12-02T19:57:03.991027Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "Kludex",
          "product": "python-multipart",
          "versions": [
            {
              "status": "affected",
              "version": "< 0.0.18"
            }
          ]
        }
      ]
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "affectedData": [
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          "vendor": "kludex",
          "product": "python-multipart",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "0.0.18",
              "versionType": "custom"
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          "defaultStatus": "unknown"
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  "published": "2024-12-02T16:15:14.457",
  "references": [
    {
      "url": "https://github.com/Kludex/python-multipart/commit/c4fe4d3cebc08c660e57dd709af1ffa7059b3177",
      "source": "security-advisories@github.com"
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    {
      "url": "https://github.com/Kludex/python-multipart/security/advisories/GHSA-59g5-xgcq-4qw3",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
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      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "python-multipart is a streaming multipart parser for Python. When parsing form data, python-multipart skips line breaks (CR \\r or LF \\n) in front of the first boundary and any tailing bytes after the last boundary. This happens one byte at a time and emits a log event each time, which may cause excessive logging for certain inputs. An attacker could abuse this by sending a malicious request with lots of data before the first or after the last boundary, causing high CPU load and stalling the processing thread for a significant amount of time. In case of ASGI application, this could stall the event loop and prevent other requests from being processed, resulting in a denial of service (DoS). This vulnerability is fixed in 0.0.18."
    },
    {
      "lang": "es",
      "value": "python-multipart es un analizador multiparte de transmisión para Python. Al analizar datos de formularios, python-multipart omite los saltos de línea (CR \\r o LF \\n) delante del primer límite y cualquier byte posterior después del último límite. Esto sucede un byte a la vez y emite un evento de registro cada vez, lo que puede causar un registro excesivo para ciertas entradas. Un atacante podría abusar de esto enviando una solicitud maliciosa con una gran cantidad de datos antes del primer o después del último límite, lo que causa una alta carga de CPU y detiene el hilo de procesamiento durante una cantidad significativa de tiempo. En el caso de la aplicación ASGI, esto podría detener el bucle de eventos y evitar que se procesen otras solicitudes, lo que resulta en una denegación de servicio (DoS). Esta vulnerabilidad se corrigió en 0.0.18."
    }
  ],
  "lastModified": "2026-06-17T08:09:36.640",
  "sourceIdentifier": "security-advisories@github.com"
}