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CVE-2024-32974

Description

Envoy is a cloud-native, open source edge and service proxy. A crash was observed in `EnvoyQuicServerStream::OnInitialHeadersComplete()` with following call stack. It is a use-after-free caused by QUICHE continuing push request headers after `StopReading()` being called on the stream. As after `StopReading()`, the HCM's `ActiveStream` might have already be destroyed and any up calls from QUICHE could potentially cause use after free.

POC

Reference

- https://github.com/envoyproxy/envoy/security/advisories/GHSA-mgxp-7hhp-8299

Github

No PoCs found on GitHub currently.