Description (CNA)
Envoy is an open source L7 proxy and communication bus designed for large modern service oriented architectures. In affected versions Envoy transitions a H/2 connection to the CLOSED state when it receives a GOAWAY frame without any streams outstanding. The connection state is transitioned to DRAINING when it receives a SETTING frame with the SETTINGS_MAX_CONCURRENT_STREAMS parameter set to 0. Receiving these two frames in the same I/O event results in abnormal termination of the Envoy process due to invalid state transition from CLOSED to DRAINING. A sequence of H/2 frames delivered by an untrusted upstream server will result in Denial of Service in the presence of untrusted **upstream** servers. Envoy versions 1.19.1, 1.18.4 contain fixes to stop processing of pending H/2 frames after connection transition to the CLOSED state.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| envoyproxy / envoy | affected >= 1.19.0, < 1.19.1; affected >= 1.18.0, < 1.18.4 |
CWE
CWE-754
References
- https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8
ADP enrichment
No English description supplied.