{"id":"UBUNTU-CVE-2020-8559","details":"The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6 are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to escalate privileges from a node compromise to a full cluster compromise.","modified":"2025-07-14T07:00:33.223208Z","published":"2020-07-22T14:15:00Z","withdrawn":"2025-08-28T16:59:42Z","upstream":["CVE-2020-8559"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-8559"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2020/07/15/6"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-8559"}],"affected":[{"package":{"name":"kubernetes","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/kubernetes@1.0?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0"],"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-8559.json"}},{"package":{"name":"kubernetes","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/kubernetes@1.0?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0"],"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-8559.json"}},{"package":{"name":"kubernetes","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/kubernetes@1.0?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0"],"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-8559.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}