{"id":"UBUNTU-CVE-2021-28235","details":"Authentication vulnerability found in Etcd-io v.3.4.10 allows remote attackers to escalate privileges via the debug function.","modified":"2026-07-02T18:00:41.046748928Z","published":"2023-04-04T15:15:00Z","related":["USN-6189-1"],"upstream":["CVE-2021-28235"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-28235"},{"type":"REPORT","url":"https://github.com/etcd-io/etcd/pull/15648"},{"type":"REPORT","url":"https://github.com/etcd-io/etcd/pull/15655"},{"type":"REPORT","url":"https://github.com/etcd-io/etcd/commit/1f746597ea6ce9f0a4554108bc853f256e150b0b"},{"type":"REPORT","url":"https://github.com/etcd-io/etcd/commit/3618ab4b07cc9c0883b6a642da198877e25d612b"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6189-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-28235"}],"affected":[{"package":{"name":"etcd","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.0+dfsg-2","2.2.1+dfsg-1","2.2.2+dfsg-1","2.2.2+dfsg-2","2.2.3+dfsg-1","2.2.5+dfsg-1","2.2.5+dfsg-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.5+dfsg-1ubuntu1","binary_name":"etcd"},{"binary_name":"golang-etcd-server-dev","binary_version":"2.2.5+dfsg-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28235.json"}},{"package":{"name":"etcd","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.17+dfsg-1ubuntu0.1+esm2"}]}],"versions":["3.1.0-1","3.2.9+dfsg-2","3.2.9+dfsg-3","3.2.17+dfsg-1","3.2.17+dfsg-1ubuntu0.1~esm1","3.2.17+dfsg-1ubuntu0.1","3.2.17+dfsg-1ubuntu0.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"etcd","binary_version":"3.2.17+dfsg-1ubuntu0.1+esm2"},{"binary_name":"etcd-client","binary_version":"3.2.17+dfsg-1ubuntu0.1+esm2"},{"binary_name":"etcd-server","binary_version":"3.2.17+dfsg-1ubuntu0.1+esm2"},{"binary_version":"3.2.17+dfsg-1ubuntu0.1+esm2","binary_name":"golang-etcd-server-dev"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28235.json"}},{"package":{"name":"etcd","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.26+dfsg-6ubuntu0.2+esm1"}]}],"versions":["3.2.26+dfsg-3","3.2.26+dfsg-4","3.2.26+dfsg-6","3.2.26+dfsg-6ubuntu0.1","3.2.26+dfsg-6ubuntu0.2"],"ecosystem_specific":{"binaries":[{"binary_name":"etcd","binary_version":"3.2.26+dfsg-6ubuntu0.2+esm1"},{"binary_name":"etcd-client","binary_version":"3.2.26+dfsg-6ubuntu0.2+esm1"},{"binary_name":"etcd-server","binary_version":"3.2.26+dfsg-6ubuntu0.2+esm1"},{"binary_version":"3.2.26+dfsg-6ubuntu0.2+esm1","binary_name":"golang-etcd-server-dev"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28235.json"}},{"package":{"name":"etcd","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.25+dfsg-7ubuntu0.22.04.1+esm1"}]}],"versions":["3.3.25+dfsg-6","3.3.25+dfsg-7","3.3.25+dfsg-7ubuntu0.22.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"etcd","binary_version":"3.3.25+dfsg-7ubuntu0.22.04.1+esm1"},{"binary_version":"3.3.25+dfsg-7ubuntu0.22.04.1+esm1","binary_name":"etcd-client"},{"binary_name":"etcd-server","binary_version":"3.3.25+dfsg-7ubuntu0.22.04.1+esm1"},{"binary_version":"3.3.25+dfsg-7ubuntu0.22.04.1+esm1","binary_name":"golang-etcd-server-dev"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28235.json"}},{"package":{"name":"etcd","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.23-4ubuntu2","3.4.30-1","3.4.30-1build1","3.4.30-1ubuntu0.24.04.1","3.4.30-1ubuntu0.24.04.2","3.4.30-1ubuntu0.24.04.2+esm1","3.4.30-1ubuntu0.24.04.3","3.4.30-1ubuntu0.24.04.3+esm1","3.4.30-1ubuntu0.24.04.3+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"etcd-client","binary_version":"3.4.30-1ubuntu0.24.04.3+esm2"},{"binary_version":"3.4.30-1ubuntu0.24.04.3+esm2","binary_name":"etcd-server"},{"binary_name":"golang-etcd-server-dev","binary_version":"3.4.30-1ubuntu0.24.04.3+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28235.json"}},{"package":{"name":"etcd","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.16-4"],"ecosystem_specific":{"binaries":[{"binary_name":"etcd-client","binary_version":"3.5.16-4"},{"binary_version":"3.5.16-4","binary_name":"etcd-server"},{"binary_version":"3.5.16-4","binary_name":"golang-etcd-server-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28235.json"}},{"package":{"name":"etcd","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.16-4","3.5.16-10","3.5.16-10ubuntu0.26.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"etcd-client","binary_version":"3.5.16-10ubuntu0.26.04.1~esm1"},{"binary_name":"etcd-server","binary_version":"3.5.16-10ubuntu0.26.04.1~esm1"},{"binary_version":"3.5.16-10ubuntu0.26.04.1~esm1","binary_name":"golang-etcd-server-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28235.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}