FKIE_CVE-2024-21647

Vulnerability from fkie_nvd - Published: 2024-01-08 14:15 - Updated: 2025-11-03 22:16
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Puma is a web server for Ruby/Rack applications built for parallelism. Prior to version 6.4.2, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies in a way that allowed HTTP request smuggling. Fixed versions limits the size of chunk extensions. Without this limit, an attacker could cause unbounded resource (CPU, network bandwidth) consumption. This vulnerability has been fixed in versions 6.4.2 and 5.6.8.
References
security-advisories@github.comhttps://github.com/puma/puma/commit/5fc43d73b6ff193325e657a24ed76dec79133e93Patch
security-advisories@github.comhttps://github.com/puma/puma/security/advisories/GHSA-c2f4-cvqm-65w2Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/puma/puma/commit/5fc43d73b6ff193325e657a24ed76dec79133e93Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/puma/puma/security/advisories/GHSA-c2f4-cvqm-65w2Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/11/msg00004.html
Impacted products
Vendor Product Version
puma puma *
puma puma *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:puma:puma:*:*:*:*:*:ruby:*:*",
              "matchCriteriaId": "A4C4E799-9F02-4DF4-A3C3-8A7DA1B86BFE",
              "versionEndExcluding": "5.6.8",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:puma:puma:*:*:*:*:*:ruby:*:*",
              "matchCriteriaId": "9729F4C2-7642-400E-B88A-154E29A8CA2C",
              "versionEndExcluding": "6.4.2",
              "versionStartIncluding": "6.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Puma is a web server for Ruby/Rack applications built for parallelism. Prior to version 6.4.2, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies in a way that allowed HTTP request smuggling. Fixed versions limits the size of chunk extensions. Without this limit, an attacker could cause unbounded resource (CPU, network bandwidth) consumption. This vulnerability has been fixed in versions 6.4.2 and 5.6.8.\n\n"
    },
    {
      "lang": "es",
      "value": "Puma es un servidor web para aplicaciones Ruby/Rack creado para el paralelismo. Antes de la versi\u00f3n 6.4.2, Puma exhib\u00eda un comportamiento incorrecto al analizar cuerpos de codificaci\u00f3n de transferencia fragmentados de una manera que permit\u00eda el contrabando de solicitudes HTTP. Las versiones fijas limitan el tama\u00f1o de las extensiones de fragmentos. Sin este l\u00edmite, un atacante podr\u00eda provocar un consumo ilimitado de recursos (CPU, ancho de banda de red). Esta vulnerabilidad se ha solucionado en las versiones 6.4.2 y 5.6.8."
    }
  ],
  "id": "CVE-2024-21647",
  "lastModified": "2025-11-03T22:16:44.987",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-01-08T14:15:47.640",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/puma/puma/commit/5fc43d73b6ff193325e657a24ed76dec79133e93"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/puma/puma/security/advisories/GHSA-c2f4-cvqm-65w2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://github.com/puma/puma/commit/5fc43d73b6ff193325e657a24ed76dec79133e93"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://github.com/puma/puma/security/advisories/GHSA-c2f4-cvqm-65w2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2024/11/msg00004.html"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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