{"schema_version":"1.7.5","id":"CVE-2018-16886","published":"2019-01-14T19:29:00.243Z","modified":"2026-07-08T05:52:21.235972305Z","aliases":["GHSA-h6xx-pmxh-3wgp","GO-2021-0077"],"related":["CGA-7rj7-px9h-mv37","SUSE-SU-2024:3656-1","openSUSE-SU-2024:10741-1"],"details":"etcd versions 3.2.x before 3.2.26 and 3.3.x before 3.3.11 are vulnerable to an improper authentication issue when role-based access control (RBAC) is used and client-cert-auth is enabled. If an etcd client server TLS certificate contains a Common Name (CN) which matches a valid RBAC username, a remote attacker may authenticate as that user with any valid (trusted) client certificate in a REST API request to the gRPC-gateway.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/etcd-io/etcd","events":[{"introduced":"e475a4ea710491899fd4427552eda6ee45775320"},{"fixed":"06cec40911744c0aca5d1afd69b2631b0a4879ba"},{"introduced":"c23606781f63d09917a1e7abfcefeb337a9608ea"},{"fixed":"2cf9e51d2a78003b164c2998886158e60ded1cbb"}],"database_specific":{"cpe":"cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.2.0"},{"fixed":"3.2.26"},{"introduced":"3.3.0"},{"fixed":"3.3.11"}],"source":"CPE_RANGE"}}],"versions":["v3.3.10","v3.3.9","v3.3.8","v3.3.7","v3.3.6","v3.3.5","v3.3.4","v3.3.3","v3.3.2","v3.3.1","v3.3.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-16886.json"}}],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JX7QTIT465BQGRGNCE74RATRQLKT2QE4/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPGYHMSKDPW5GAMI7BEP3XQRVRLLBJKS/"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/106540"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0237"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:1352"},{"type":"ADVISORY","url":"https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.2.md#security-authentication"},{"type":"ADVISORY","url":"https://github.com/etcd-io/etcd/blob/1eee465a43720d713bb69f7b7f5e120135fdb1ac/CHANGELOG-3.3.md#security-authentication"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16886"}],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"30"},{"last_affected":"30"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora"},{"cpes":["cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"7.0"},{"last_affected":"7.0"}],"source":"CPE_STRING","vendor_product":"redhat:enterprise_linux_desktop"},{"cpes":["cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"7.0"},{"last_affected":"7.0"}],"source":"CPE_STRING","vendor_product":"redhat:enterprise_linux_server"},{"cpes":["cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"7.0"},{"last_affected":"7.0"}],"source":"CPE_STRING","vendor_product":"redhat:enterprise_linux_workstation"}]},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}