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CVE-2025-22871

Estado: AplazadaCrítica (9.1)—

The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext.

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.

Vulnerabilidad remota de red sin autenticación (AV:N, PR:N, UI:N) en parsing HTTP que permite request smuggling hacia servidores backend, desviando o manipulando solicitudes.

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 ScanningSSL/TLS InspectionPrivileged Account ManagementNetwork SegmentationNetwork Intrusion Prevention

Tecnologías afectadas (1)

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

Golang — Net/httpAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-22871",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-22871",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-04-18T14:57:03.151639Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.1,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@golang.org",
      "affectedData": [
        {
          "vendor": "Go standard library",
          "product": "net/http/internal",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "1.23.8",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "1.24.0-0",
              "lessThan": "1.24.2",
              "versionType": "semver"
            }
          ],
          "packageName": "net/http/internal",
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "readChunkLine"
            },
            {
              "name": "chunkedReader.Read"
            }
          ]
        }
      ]
    },
    {
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
      "affectedData": [
        {
          "vendor": "Siemens",
          "product": "SENTRON 7KT PAC1261 Data Manager",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "V2.1.0",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2025-04-08T20:15:20.183",
  "references": [
    {
      "url": "https://go.dev/cl/652998",
      "source": "security@golang.org"
    },
    {
      "url": "https://go.dev/issue/71988",
      "source": "security@golang.org"
    },
    {
      "url": "https://groups.google.com/g/golang-announce/c/Y2uBTVKjBQk",
      "source": "security@golang.org"
    },
    {
      "url": "https://pkg.go.dev/vuln/GO-2025-3563",
      "source": "security@golang.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2025/04/04/4",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-783943.html",
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext."
    },
    {
      "lang": "es",
      "value": "El paquete net/http acepta incorrectamente un LF simple como terminador de línea en líneas de datos fragmentados. Esto puede permitir el contrabando de solicitudes si se utiliza un servidor net/http junto con un servidor que acepta incorrectamente un LF simple como parte de una extensión fragmentada."
    }
  ],
  "lastModified": "2026-06-17T08:50:41.163",
  "sourceIdentifier": "security@golang.org"
}