{"containers":{"cna":{"affected":[{"product":"envoy","vendor":"envoyproxy","versions":[{"status":"affected","version":">= 1.19.0, < 1.19.1"},{"status":"affected","version":">= 1.18.0, < 1.18.4"}]}],"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."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-754","description":"CWE-754: Improper Check for Unusual or Exceptional Conditions","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2021-08-24T20:55:10.000Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"tags":["x_refsource_MISC"],"url":"https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history"},{"tags":["x_refsource_CONFIRM"],"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8"}],"source":{"advisory":"GHSA-j374-mjrw-vvp8","discovery":"UNKNOWN"},"title":"Incorrect handling of H/2 GOAWAY followed by SETTINGS frames","x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2021-32780","STATE":"PUBLIC","TITLE":"Incorrect handling of H/2 GOAWAY followed by SETTINGS frames"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"envoy","version":{"version_data":[{"version_value":">= 1.19.0, < 1.19.1"},{"version_value":">= 1.18.0, < 1.18.4"}]}}]},"vendor_name":"envoyproxy"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","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."}]},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-754: Improper Check for Unusual or Exceptional Conditions"}]}]},"references":{"reference_data":[{"name":"https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history","refsource":"MISC","url":"https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history"},{"name":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8","refsource":"CONFIRM","url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8"}]},"source":{"advisory":"GHSA-j374-mjrw-vvp8","discovery":"UNKNOWN"}}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T23:33:56.068Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://www.envoyproxy.io/docs/envoy/v1.19.0/version_history/version_history"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j374-mjrw-vvp8"}]}]},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2021-32780","datePublished":"2021-08-24T20:55:10.000Z","dateReserved":"2021-05-12T00:00:00.000Z","dateUpdated":"2024-08-03T23:33:56.068Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}