CVE-2023-35945
Description
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.
How to fix
- envoyproxy envoy1.23.11, 1.24.9, 1.25.8, 1.26.3 or later
- nghttp2 nghttp21.55.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| envoyproxy envoy | v < 1.23.11, 1.24.0 ≤ v < 1.24.9, 1.25.0 ≤ v < 1.25.8, 1.26.0 ≤ v < 1.26.3 | 1.23.11, 1.24.9, 1.25.8, 1.26.3 |
| nghttp2 nghttp2 | v < 1.55.1 | 1.55.1 |
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