{"id":"UBUNTU-CVE-2021-20288","details":"An authentication flaw was found in ceph in versions before 14.2.20. When the monitor handles CEPHX_GET_AUTH_SESSION_KEY requests, it doesn't sanitize other_keys, allowing key reuse. An attacker who can request a global_id can exploit the ability of any user to request a global_id previously associated with another user, as ceph does not force the reuse of old keys to generate new ones. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.","modified":"2026-04-22T12:45:57.171112Z","published":"2021-04-15T15:15:00Z","related":["USN-4998-1","USN-5128-1"],"upstream":["CVE-2021-20288"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-20288"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2021/04/14/2"},{"type":"REPORT","url":"https://docs.ceph.com/en/latest/security/CVE-2021-20288/#cve-2021-20288"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4998-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5128-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-20288"}],"affected":[{"package":{"name":"ceph","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/ceph@0.80.11-0ubuntu1.14.04.4+esm4?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.67.4-0ubuntu2","0.67.4-0ubuntu3","0.72-0ubuntu1","0.72.1-0ubuntu1","0.72.1-2","0.72.1-3","0.72.2-1","0.72.2-2","0.78-0ubuntu1","0.79-0ubuntu1","0.80.1-0ubuntu1","0.80.1-0ubuntu1.1","0.80.5-0ubuntu0.14.04.1","0.80.7-0ubuntu0.14.04.1","0.80.9-0ubuntu0.14.04.1","0.80.9-0ubuntu0.14.04.2","0.80.10-0ubuntu0.14.04.1","0.80.10-0ubuntu1.14.04.2","0.80.10-0ubuntu1.14.04.3","0.80.11-0ubuntu1.14.04.1","0.80.11-0ubuntu1.14.04.2","0.80.11-0ubuntu1.14.04.3","0.80.11-0ubuntu1.14.04.4","0.80.11-0ubuntu1.14.04.4+esm2","0.80.11-0ubuntu1.14.04.4+esm3","0.80.11-0ubuntu1.14.04.4+esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"ceph","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"ceph-common","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"ceph-fs-common","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"ceph-fuse","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"ceph-mds","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"ceph-resource-agents","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"ceph-test","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"libcephfs-java","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"libcephfs-jni","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"libcephfs1","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"librados2","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"librbd1","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"python-ceph","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"radosgw","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"rbd-fuse","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"},{"binary_name":"rest-bench","binary_version":"0.80.11-0ubuntu1.14.04.4+esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20288.json"}},{"package":{"name":"ceph","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/ceph@10.2.11-0ubuntu0.16.04.3+esm3?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.94.3-0ubuntu2","0.94.5-0ubuntu1","9.2.0-0ubuntu3","9.2.0-0ubuntu4","9.2.0-0ubuntu5","9.2.0-0ubuntu6","10.0.2-0ubuntu1","10.0.3-0ubuntu1","10.0.5-0ubuntu1","10.1.0-0ubuntu1","10.1.1-0ubuntu1","10.1.2-0ubuntu1","10.2.0-0ubuntu0.16.04.1","10.2.0-0ubuntu0.16.04.2","10.2.2-0ubuntu0.16.04.2","10.2.3-0ubuntu0.16.04.2","10.2.5-0ubuntu0.16.04.1","10.2.6-0ubuntu0.16.04.1","10.2.7-0ubuntu0.16.04.1","10.2.9-0ubuntu0.16.04.1","10.2.10-0ubuntu0.16.04.1","10.2.11-0ubuntu0.16.04.1","10.2.11-0ubuntu0.16.04.2","10.2.11-0ubuntu0.16.04.3","10.2.11-0ubuntu0.16.04.3+esm1","10.2.11-0ubuntu0.16.04.3+esm2","10.2.11-0ubuntu0.16.04.3+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"ceph","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_name":"ceph-common","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_name":"ceph-fs-common","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_name":"ceph-fuse","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_name":"ceph-mds","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_name":"ceph-resource-agents","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_name":"ceph-test","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_name":"libcephfs-java","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_name":"libcephfs-jni","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_version":"10.2.11-0ubuntu0.16.04.3+esm3","binary_name":"libcephfs1"},{"binary_name":"librados2","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_name":"libradosstriper1","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_version":"10.2.11-0ubuntu0.16.04.3+esm3","binary_name":"librbd1"},{"binary_name":"librgw2","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_name":"python-ceph","binary_version":"10.2.11-0ubuntu0.16.04.3+esm3"},{"binary_name":"python-cephfs",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