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BIT-envoy-2021-32781 — Continued processing of requests after locally generated response

Affected: Bitnami: envoy

Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions after Envoy sends a locally generated response it must stop further processing of request or response data. However when local response is generated due the internal buffer overflow while request or response is processed by the filter chain the operation may not be stopped completely and result in accessing a freed memory block. A specifically constructed request delivered by an untrusted downstream or upstream peer in the presence of extensions that modify and increase the size of request or response bodies resulting in a Denial of Service when using extensions that modify and increase the size of request or response bodies, such as decompressor filter. Envoy versions 1.19.1, 1.18.4, 1.17.4, 1.16.5 contain fixes to address incomplete termination of request processing after locally generated response. As a workaround disable Envoy's decompressor, json-transcoder or grpc-web extensions or proprietary extensions that modify and increase the size of request or response bodies, if feasible.

EUVD-2026-28124

fkie_cve-2021-32781

gsd-2021-32781

RHSA-2021:3272 — Red Hat Security Advisory: Red Hat OpenShift Service Mesh 2.0.7.1 security update

envoyproxy/envoy: HTTP request with multiple value headers can bypass authorization policies envoyproxy/envoy: HTTP request with a URL fragment in the URI can bypass authorization policies envoyproxy/envoy: denial of service when using extensions that modify request or response sizes istio/istio: HTTP request can bypass authorization mechanisms due to case insensitive host comparison istio/istio: HTTP request with fragment in URI can bypass authorization mechanisms