CVE-2021-32780

描述

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.

受影響套件(1)

• Bitnami/envoy>= 1.18.0, < 1.18.4, >= 1.19.0, < 1.19.1

CVSS 分數

參考連結(3)

• WEBhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8
• WEBhttps://nvd.nist.gov/vuln/detail/CVE-2021-32780
• WEBhttps://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history