{"id":"CVE-2023-27496","summary":"Envoy may crash when a redirect url without a state param is received in the oauth filter","details":"Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the OAuth filter assumes that a `state` query param is present on any response that looks like an OAuth redirect response. Sending it a request with the URI path equivalent to the redirect path, without the `state` parameter, will lead to abnormal termination of Envoy process. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 contain a patch. The issue can also be mitigated by locking down OAuth traffic, disabling the filter, or by filtering traffic before it reaches the OAuth filter (e.g. via a lua script). \n","aliases":["BIT-envoy-2023-27496","GHSA-j79q-2g66-2xv5"],"modified":"2026-08-12T03:51:27.166528653Z","published":"2023-04-04T19:48:56.678Z","database_specific":{"cwe_ids":["CWE-20"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27496.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27496.json"},{"type":"ADVISORY","url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j79q-2g66-2xv5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27496"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/envoyproxy/envoy","events":[{"introduced":"0"},{"fixed":"6392d12242234948b15a0fecee629f9cf8b76cee"},{"introduced":"ce49c7f65668a22b80d1e83c35d170741bb8d46a"},{"fixed":"b2064ed660934383cece8c8d60393d5b0720ae4d"},{"introduced":"15baf56003f33a07e0ab44f82f75a660040db438"},{"fixed":"d3d04156c3b05f8b4532d44e602fdd1b430c64bb"},{"introduced":"9184b84cd0dcb3a6c57eb44b177d91c70e1a0901"},{"fixed":"e99d61c4596573fbea8b8a9def8b160e138a4018"}],"database_specific":{"cpe":"cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.22.9"},{"introduced":"1.23.0"},{"fixed":"1.23.6"},{"introduced":"1.24.0"},{"fixed":"1.24.4"},{"introduced":"1.25.0"},{"fixed":"1.25.3"}],"source":"CPE_RANGE"}}],"versions":["v1.25.2","v1.23.5","v1.24.3","v1.22.8","v1.24.2","v1.23.4","v1.25.1","v1.22.7","v1.25.0","v1.24.1","v1.22.6","v1.23.3","v1.23.2","v1.24.0","v1.23.1","v1.22.5","v1.22.4","v1.22.3","v1.23.0","v1.22.2","v1.22.0","v1.21.0","v1.20.0","v1.19.0","v1.18.2","v1.18.1","v1.18.0","v1.17.0","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-2023-27496.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}