CVE-2021-20288

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.

• CWE-287
• CWE-287

• https://bugzilla.redhat.com/show_bug.cgi?id=1938031Issue Tracking, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2023/10/msg00034.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/362CEPPYF3YMJZBEJQUT3KDE2EHYYIYQ/Mailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5BPIAYTRCWAU4XWCDBK2THEFVXSC4XGK/Mailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JVWUKUUS5BCIFWRV3JCUQMAPJ4HIWSED/Mailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202105-39Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1938031Issue Tracking, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2023/10/msg00034.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/362CEPPYF3YMJZBEJQUT3KDE2EHYYIYQ/Mailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5BPIAYTRCWAU4XWCDBK2THEFVXSC4XGK/Mailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JVWUKUUS5BCIFWRV3JCUQMAPJ4HIWSED/Mailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202105-39Third Party Advisory

Published

Apr 15, 2021

Last Modified

Jun 17, 2026

Status

Modified

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