CVE-2025-62504: fallo de gravedad media en envoyproxy envoy
Envoy Lua filter use-after-free when oversized rewritten response body causes crash
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
13Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 6.5epss 0.4%
Envoy is an open source edge and service proxy. Envoy versions earlier than 1.36.2, 1.35.6, 1.34.10, and 1.33.12 contain a use-after-free vulnerability in the Lua filter. When a Lua script executing in the response phase rewrites a response body so that its size exceeds the configured per_connection_buffer_limit_bytes (default 1MB), Envoy generates a local reply whose headers override the original response headers, leaving dangling references and causing a crash. This results in denial of service. Updating to versions 1.36.2, 1.35.6, 1.34.10, or 1.33.12 fixes the issue. Increasing per_connection_buffer_limit_bytes (and for HTTP/2 the initial_stream_window_size) or increasing per_request_buffer_limit_bytes / request_body_buffer_limit can reduce the likelihood of triggering the condition but does not correct the underlying memory safety flaw.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Productos afectados
envoyproxy · envoyCVEs relacionadas — envoyproxy envoy
En el mismo producto, de las más peligrosas a las menos.
CVE-2024-30255MEDIUMHTTP/2: CPU exhaustion due to CONTINUATION frame floodEPSS 85.0%CVE-2024-27919HIGHHTTP/2: memory exhaustion due to CONTINUATION frame floodEPSS 83.9%CVE-2021-29492HIGHBypass of path matching rules using escaped slash charactersEPSS 63.1%CVE-2021-32777HIGHIncorrect concatenation of multiple value request headers in ext-authz extensionEPSS 3.3%CVE-2021-21378HIGHJWT authentication bypass with unknown issuer tokenEPSS 1.7%CVE-2023-35945HIGHEnvoy vulnerable to HTTP/2 memory leak in nghttp2 codecEPSS 1.7%