https://vulnerability.circl.lu/sightings/feed 2026-05-04T14:57:58.670959+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent sightings. https://vulnerability.circl.lu/sighting/176046d2-5d76-4a39-874c-c5b88d8041a9/export 2026-05-04T14:57:59.030291+00:00 Automation user http://vulnerability.circl.lu/user/automation {"uuid": "176046d2-5d76-4a39-874c-c5b88d8041a9", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-32780", "type": "seen", "source": "https://t.me/cibsecurity/27849", "content": "\u203c CVE-2021-32780 \u203c\n\nEnvoy 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.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-08-25T00:23:31.000000Z"} 2021-08-25T00:23:31+00:00