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CVE-2025-4947

Estado: AnalizadaMedia (6.5)—

libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle attacks.

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 (1)

Haxx — Curl

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-4947",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-4947",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-05-28T13:57:59.462879Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "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": "2499f714-1537-4658-8207-48ae4bb9eae9",
      "affectedData": [
        {
          "vendor": "curl",
          "product": "curl",
          "versions": [
            {
              "status": "affected",
              "version": "8.13.0",
              "versionType": "semver",
              "lessThanOrEqual": "8.13.0"
            },
            {
              "status": "affected",
              "version": "8.12.1",
              "versionType": "semver",
              "lessThanOrEqual": "8.12.1"
            },
            {
              "status": "affected",
              "version": "8.12.0",
              "versionType": "semver",
              "lessThanOrEqual": "8.12.0"
            },
            {
              "status": "affected",
              "version": "8.11.1",
              "versionType": "semver",
              "lessThanOrEqual": "8.11.1"
            },
            {
              "status": "affected",
              "version": "8.11.0",
              "versionType": "semver",
              "lessThanOrEqual": "8.11.0"
            },
            {
              "status": "affected",
              "version": "8.10.1",
              "versionType": "semver",
              "lessThanOrEqual": "8.10.1"
            },
            {
              "status": "affected",
              "version": "8.10.0",
              "versionType": "semver",
              "lessThanOrEqual": "8.10.0"
            },
            {
              "status": "affected",
              "version": "8.9.1",
              "versionType": "semver",
              "lessThanOrEqual": "8.9.1"
            },
            {
              "status": "affected",
              "version": "8.9.0",
              "versionType": "semver",
              "lessThanOrEqual": "8.9.0"
            },
            {
              "status": "affected",
              "version": "8.8.0",
              "versionType": "semver",
              "lessThanOrEqual": "8.8.0"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2025-05-28T07:15:24.780",
  "references": [
    {
      "url": "https://curl.se/docs/CVE-2025-4947.html",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9"
    },
    {
      "url": "https://curl.se/docs/CVE-2025-4947.json",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9"
    },
    {
      "url": "https://hackerone.com/reports/3150884",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Patch"
      ],
      "source": "2499f714-1537-4658-8207-48ae4bb9eae9"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2025/05/28/4",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle attacks."
    },
    {
      "lang": "es",
      "value": "libcurl omite accidentalmente la verificación del certificado para conexiones QUIC al conectarse a un host especificado como dirección IP en la URL. Por lo tanto, no detecta impostores ni ataques de intermediario."
    }
  ],
  "lastModified": "2026-06-17T09:34:22.287",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0BFF5268-7985-46A1-A71F-9E1586E9E22E",
              "versionEndExcluding": "8.14.0",
              "versionStartIncluding": "8.8.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9"
}