CVE-2024-39305

Estado: AnalizadaCrítica (9.1)—

Envoy is a cloud-native, open source edge and service proxy. Prior to versions 1.30.4, 1.29.7, 1.28.5, and 1.27.7. Envoy references already freed memory when route hash policy is configured with cookie attributes. Note that this vulnerability has been fixed in the open as the effect would be immediately apparent if it was configured. Memory allocated for holding attribute values is freed after configuration was parsed. During request processing Envoy will attempt to copy content of de-allocated memory into request cookie header.

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This can lead to arbitrary content of Envoy's memory to be sent to the upstream service or abnormal process termination. This vulnerability is fixed in Envoy versions v1.30.4, v1.29.7, v1.28.5, and v1.27.7. As a workaround, do not use cookie attributes in route action hash policy.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Puntuación base: 9.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.65%
Percentil entre todas las CVEs puntuadas: 49
Fecha de la puntuación: 6/10/2026

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)

Envoyproxy — Envoy

CWE

CWE-416

Referencias

JSON original (NVD)

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  "weaknesses": [
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      "value": "Envoy is a cloud-native, open source edge and service proxy. Prior to versions 1.30.4, 1.29.7, 1.28.5, and 1.27.7. Envoy references already freed memory when route hash policy is configured with cookie attributes. Note that this vulnerability has been fixed in the open as the effect would be immediately apparent if it was configured. Memory allocated for holding attribute values is freed after configuration was parsed. During request processing Envoy will attempt to copy content of de-allocated memory into request cookie header. This can lead to arbitrary content of Envoy's memory to be sent to the upstream service or abnormal process termination. This vulnerability is fixed in Envoy versions v1.30.4, v1.29.7, v1.28.5, and v1.27.7. As a workaround, do not use cookie attributes in route action hash policy."
    },
    {
      "lang": "es",
      "value": "Envoy es un proxy de servicio y borde de código abierto, nativo de la nube. Antes de las versiones 1.30.4, 1.29.7, 1.28.5 y 1.27.7. Envoy hace referencia a la memoria ya liberada cuando la política de hash de ruta se configura con atributos de cookies. Tenga en cuenta que esta vulnerabilidad se ha solucionado abiertamente, ya que el efecto sería inmediatamente evidente si se configurara. La memoria asignada para contener valores de atributos se libera después de analizar la configuración. Durante el procesamiento de la solicitud, Envoy intentará copiar el contenido de la memoria desasignada en el encabezado de la cookie de solicitud. Esto puede provocar que el contenido arbitrario de la memoria de Envoy se envíe al servicio ascendente o que el proceso finalice anormalmente. Esta vulnerabilidad se solucionó en las versiones de Envoy v1.30.4, v1.29.7, v1.28.5 y v1.27.7. Como workaround, no utilice atributos de cookies en la política hash de acción de ruta."
    }
  ],
  "lastModified": "2026-06-17T07:41:40.880",
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            {
              "criteria": "cpe:2.3:a:envoyproxy:envoy:1.30.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3CFA0B22-A87A-4F8A-8630-3C2D77B797F8"
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