CVE-2023-35945

Date: July 13, 2023

Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy’s HTTP/2 codec may leak a header map and bookkeeping structures upon receiving "RST_STREAM" immediately followed by the "GOAWAY" frames from an upstream server. In nghttp2, cleanup of pending requests due to receipt of the "GOAWAY" frame skips de-allocation of the bookkeeping structure and pending compressed header. The error return [code path] is taken if connection is already marked for not sending more requests due to "GOAWAY" frame. The clean-up code is right after the return statement, causing memory leak. Denial of service through memory exhaustion. This vulnerability was patched in versions(s) 1.26.3, 1.25.8, 1.24.9, 1.23.11.

Language: C