{"id":"CVE-2021-39204","details":"Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, incorrectly handles resetting of HTTP/2 streams with excessive complexity. This can lead to high CPU utilization when a large number of streams are reset. This can result in a DoS condition. Pomerium versions 0.14.8 and 0.15.1 contain an upgraded envoy binary with this vulnerability patched.","aliases":["BIT-envoy-2021-39204","GHSA-5wjf-62hw-q78r"],"modified":"2026-08-07T19:47:05.708630Z","published":"2021-09-09T22:15:09.773Z","related":["GHSA-3xh3-33v5-chcc","GHSA-5wjf-62hw-q78r"],"references":[{"type":"WEB","url":"https://groups.google.com/g/envoy-announce/c/5xBpsEZZDfE/m/wD05NZBbAgAJ"},{"type":"ADVISORY","url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xh3-33v5-chcc"},{"type":"ADVISORY","url":"https://github.com/pomerium/pomerium/security/advisories/GHSA-5wjf-62hw-q78r"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/envoyproxy/envoy","events":[{"introduced":"0"},{"last_affected":"bf5d0eb44b781ac26ff1513700bcb114b7cf4300"},{"introduced":"5c801b25cae04f06bf48248c90e87d623d7a6283"},{"fixed":"0de60452be1fa329c16076916b6bfe1f672aeed4"},{"introduced":"345ffe37148b7a35b6e8e04db0300463689e3ff1"},{"fixed":"bef18019d8fc33a4ed6aca3679aff2100241ac5e"},{"introduced":"68fe53a889416fd8570506232052b06f5a531541"},{"last_affected":"68fe53a889416fd8570506232052b06f5a531541"}],"database_specific":{"cpe":["cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","cpe:2.3:a:envoyproxy:envoy:1.19.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"0"},{"last_affected":"1.16.4"},{"introduced":"1.17.0"},{"fixed":"1.17.4"},{"introduced":"1.18.0"},{"fixed":"1.18.4"},{"introduced":"1.19.0"},{"last_affected":"1.19.0"}],"source":["CPE_RANGE","CPE_STRING"]}}],"versions":["1.19.0","v1.19.0","v1.16.4","v1.17.3","v1.18.3","v1.17.2","v1.18.2","v1.16.3","v1.18.1","v1.18.0","v1.17.1","v1.17.0","v1.16.2","v1.16.1","v1.16.0","v1.15.0","v1.14.0","v1.13.0","v1.12.0","v1.11.0","v1.10.0","v1.9.0","v1.8.0","v1.7.0","v1.6.0","v1.5.0","v1.4.0","v1.3.0","v1.2.0","v1.1.0","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-39204.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/pomerium/pomerium","events":[{"introduced":"0"},{"fixed":"d3a90a03b6b3bc0f5e821d7b544464cb28320d2f"},{"introduced":"7692b2ac4966f2606e1cea376dd33a14c984d9c9"},{"last_affected":"7692b2ac4966f2606e1cea376dd33a14c984d9c9"}],"database_specific":{"cpe":["cpe:2.3:a:pomerium:pomerium:*:*:*:*:*:*:*:*","cpe:2.3:a:pomerium:pomerium:0.15.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"0"},{"fixed":"0.14.8"},{"introduced":"0.15.0"},{"last_affected":"0.15.0"}],"source":["CPE_RANGE","CPE_STRING"]}}],"versions":["0.15.0","v0.15.0","v0.14.7","v0.14.6","v0.14.5","v0.14.4","v0.14.3","v0.14.2","v0.14.1","v0.14.0","v0.14.0-rc2","v0.12.0","v0.11.0","v0.11.0-rc2","v0.11.0-rc1","v0.10.0","v0.10.0-rc3","v0.10.0-rc2","v0.10.0-rc1","v0.9.0","v0.8.0","v0.7.2","v0.7.1","v0.7.0","v0.6.0","v0.5.0","v0.4.0","v0.3.0","v0.2.0","v0.1.0","v0.0.5","v0.0.4","v0.0.3","v0.0.2","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-39204.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}