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CVE-2021-22959

Estado: ModificadaMedia (6.5)—

The parser in accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS) in llhttp < v2.1.4 and < v6.0.6.

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).

Tecnologías afectadas (3)

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-22959",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "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:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.5,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "support@hackerone.com",
      "affectedData": [
        {
          "vendor": "NodeJS",
          "product": "Node",
          "versions": [
            {
              "status": "affected",
              "version": "4.0",
              "lessThan": "4.*",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.0",
              "lessThan": "5.*",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.0",
              "lessThan": "6.*",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "7.0",
              "lessThan": "7.*",
              "versionType": "semver"
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            {
              "status": "affected",
              "version": "8.0",
              "lessThan": "8.*",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "9.0",
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            },
            {
              "status": "affected",
              "version": "10.0",
              "lessThan": "10.*",
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            {
              "status": "affected",
              "version": "11.0",
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            {
              "status": "affected",
              "version": "12.0",
              "lessThan": "12.22.7",
              "versionType": "semver"
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            {
              "status": "affected",
              "version": "13.0",
              "lessThan": "13.*",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "14.0",
              "lessThan": "14.18.1",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "15.0",
              "lessThan": "15.*",
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            },
            {
              "status": "affected",
              "version": "16.0",
              "lessThan": "16.11.1",
              "versionType": "semver"
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          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2021-11-15T15:15:06.747",
  "references": [
    {
      "url": "https://hackerone.com/reports/1238709",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "source": "support@hackerone.com"
    },
    {
      "url": "https://www.debian.org/security/2022/dsa-5170",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "support@hackerone.com"
    },
    {
      "url": "https://www.oracle.com/security-alerts/cpujan2022.html",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "support@hackerone.com"
    },
    {
      "url": "https://hackerone.com/reports/1238709",
      "tags": [
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        "Issue Tracking",
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.debian.org/security/2022/dsa-5170",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "https://www.oracle.com/security-alerts/cpujan2022.html",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "support@hackerone.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ]
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    {
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-444"
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      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The parser in accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS) in llhttp < v2.1.4 and < v6.0.6."
    },
    {
      "lang": "es",
      "value": "El parser en acepta peticiones con un espacio (SP) justo después del nombre del encabezado antes de los dos puntos. Esto puede conllevar a un contrabando de peticiones HTTP (HRS) en llhttp versiones anteriores a v2.1.4 y versiones anteriores a v6.0.6"
    }
  ],
  "lastModified": "2026-06-17T03:38:06.607",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:llhttp:llhttp:*:*:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6B7CB576-CA48-462E-A360-6CE14FADCC6A",
              "versionEndExcluding": "2.1.4"
            },
            {
              "criteria": "cpe:2.3:a:llhttp:llhttp:*:*:*:*:*:node.js:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AF1511BB-A1F0-4AF9-80C3-5EB6317F8525",
              "versionEndExcluding": "6.0.6",
              "versionStartIncluding": "3.0.0"
            }
          ],
          "operator": "OR"
        }
      ]
    },
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              "matchCriteriaId": "9F300E13-1B40-4B35-ACA5-4D402CD41055"
            },
            {
              "criteria": "cpe:2.3:a:oracle:graalvm:21.3.0:*:*:*:enterprise:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B10E38A6-783C-45A2-98A1-12FA1EB3D3AA"
            }
          ],
          "operator": "OR"
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    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
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              "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED"
            }
          ],
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  ],
  "sourceIdentifier": "support@hackerone.com"
}