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CVE-2025-14523

Estado: AplazadaAlta (8.2)—

A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the backend interprets it as destined for another host. This discrepancy enables request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker supplies duplicate Host headers.

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 de confusión de anfitrión en libsoup expuesta por red (AV:N, PR:N, UI:N) que permite ataques de smuggling y cache poisoning explotando la discrepancia entre proxy y backend en interpretación de cabeceras Host duplicadas.

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

Network SegmentationLimit Access to Resource Over NetworkFilter Network TrafficVulnerability ScanningUser TrainingUser Account Management

Tecnologías afectadas (1)

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

Libsoup — LibsoupAI

CWE

Referencias

JSON original (NVD)

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  "published": "2025-12-11T13:15:58.983",
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    {
      "url": "https://access.redhat.com/errata/RHSA-2026:1569",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:1570",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:1571",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:1572",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/security/cve/CVE-2025-14523",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2421349",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/472",
      "source": "secalert@redhat.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the backend interprets it as destined for another host. This discrepancy enables request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker supplies duplicate Host headers."
    },
    {
      "lang": "es",
      "value": "Un fallo en el manejo de encabezados HTTP de libsoup permite múltiples encabezados Host: en una solicitud y devuelve la última ocurrencia para el procesamiento del lado del servidor. Los proxies frontales comunes a menudo respetan el primer encabezado Host:, por lo que esta discrepancia puede causar confusión de vhost donde un proxy enruta una solicitud a un backend, pero el backend la interpreta como destinada a otro host. Esta discrepancia permite ataques de contrabando de solicitudes, envenenamiento de caché o eludir los controles de acceso basados en host cuando un atacante suministra encabezados Host duplicados."
    }
  ],
  "lastModified": "2026-09-30T20:10:00.247",
  "sourceIdentifier": "secalert@redhat.com"
}