Vulnerability from bitnami_vulndb
Published
2024-07-03 07:17
Modified
2025-09-03 09:06
Summary
Envoy Proxy use after free when route hash policy is configured with cookie attributes
Details

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.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "envoy",
        "purl": "pkg:bitnami/envoy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.27.7"
            },
            {
              "introduced": "1.28.0"
            },
            {
              "fixed": "1.28.5"
            },
            {
              "introduced": "1.29.0"
            },
            {
              "fixed": "1.29.7"
            },
            {
              "introduced": "1.30.0"
            },
            {
              "fixed": "1.30.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-39305"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*"
    ],
    "severity": "Critical"
  },
  "details": "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\u0027s 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.",
  "id": "BIT-envoy-2024-39305",
  "modified": "2025-09-03T09:06:51.338Z",
  "published": "2024-07-03T07:17:43.459Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/envoy/commit/02a06681fbe0e039b1c7a9215257a7537eddb518"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/envoy/commit/50b384cb203a1f2894324cbae64b6d9bc44cce45"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/envoy/commit/99b6e525fb9f6f6f19a0425f779bc776f121c7e5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/envoy/commit/b7f509607ad860fd6a63cde4f7d6f0197f9f63bb"
    },
    {
      "type": "WEB",
      "url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-fp35-g349-h66f"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-39305"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Envoy Proxy use after free when route hash policy is configured with cookie attributes"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.