CVE-2021-32780

{"id": "CVE-2021-32780", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 3.9}]}, "published": "2021-08-24T21:15:09.947", "references": [{"url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-754"}]}, {"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-754"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Envoy es un proxy L7 de c\u00f3digo abierto y un bus de comunicaci\u00f3n dise\u00f1ado para grandes arquitecturas modernas orientadas a servicios. En las versiones afectadas, Envoy lleva a cabo una transici\u00f3n de una conexi\u00f3n H/2 al estado CLOSED cuando recibe una trama GOAWAY sin ning\u00fan flujo pendiente. El estado de la conexi\u00f3n pasa a DRAINING cuando recibe una trama SETTING con el par\u00e1metro SETTINGS_MAX_CONCURRENT_STREAMS ajustado a 0. Recibiendo estas dos tramas en el mismo evento de E/S resulta en una terminaci\u00f3n anormal del proceso Envoy debido a una transici\u00f3n de estado no v\u00e1lida de CLOSED a DRAINING. Una secuencia de tramas H/2 entregada por un servidor upstream no confiable resultar\u00e1 en una Denegaci\u00f3n de Servicio en presencia de servidores **upstream** no confiables. Envoy versiones 1.19.1 y 1.18.4, contienen correcciones para detener el procesamiento de las tramas H/2 pendientes despu\u00e9s de la transici\u00f3n de la conexi\u00f3n al estado CLOSED."}], "lastModified": "2022-06-15T15:48:22.890", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D7376E28-9915-4CA1-A5DB-40874D10E781", "versionEndExcluding": "1.18.4", "versionStartIncluding": "1.18.0"}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:1.19.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1968AA35-60E2-4A00-84A0-617738B55D33"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}