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CVE-2021-29479

Estado: ModificadaMedia (6.1)—

Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, a user supplied `X-Forwarded-Host` header can be used to perform cache poisoning of a cache fronting a Ratpack server if the cache key does not include the `X-Forwarded-Host` header as a cache key. Users are only vulnerable if they do not configure a custom `PublicAddress` instance. For versions prior to 1.9.0, by default, Ratpack utilizes an inferring version of `PublicAddress` which is vulnerable.

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This can be used to perform redirect cache poisoning where an attacker can force a cached redirect to redirect to their site instead of the intended redirect location. The vulnerability was patched in Ratpack 1.9.0. As a workaround, ensure that `ServerConfigBuilder::publicAddress` correctly configures the server in production.

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)

Ratpack Project — Ratpack

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-29479",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
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  "published": "2021-06-29T15:15:18.870",
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      "lang": "en",
      "value": "Ratpack is a toolkit for creating web applications. In versions prior to 1.9.0, a user supplied `X-Forwarded-Host` header can be used to perform cache poisoning of a cache fronting a Ratpack server if the cache key does not include the `X-Forwarded-Host` header as a cache key. Users are only vulnerable if they do not configure a custom `PublicAddress` instance. For versions prior to 1.9.0, by default, Ratpack utilizes an inferring version of `PublicAddress` which is vulnerable. This can be used to perform redirect cache poisoning where an attacker can force a cached redirect to redirect to their site instead of the intended redirect location. The vulnerability was patched in Ratpack 1.9.0. As a workaround, ensure that `ServerConfigBuilder::publicAddress` correctly configures the server in production."
    },
    {
      "lang": "es",
      "value": "Ratpack es un kit de herramientas para crear aplicaciones web. En versiones anteriores a 1.9.0, una cabecera \"X-Forwarded-Host\" suministrada por el usuario puede ser usada para llevar a cabo el envenenamiento de la caché de un servidor Ratpack si la clave de la caché no incluye la cabecera \"X-Forwarded-Host\" como clave de la caché. Unos usuarios sólo son vulnerables si no configuran una instancia personalizada de \"PublicAddress\". Para versiones anteriores a 1.9.0, por defecto, Ratpack usa una versión inferida de \"PublicAddress\" que es vulnerable. Esto puede ser usado para llevar a cabo el envenenamiento de la caché de redireccionamiento, donde un atacante puede forzar un redireccionamiento en caché para redirigir a su sitio en lugar de la ubicación de redireccionamiento prevista. La vulnerabilidad fue parcheada en Ratpack versión 1.9.0. Como solución, asegúrese de que \"ServerConfigBuilder::publicAddress\" configura correctamente el servidor en producción"
    }
  ],
  "lastModified": "2026-06-17T03:47:43.630",
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