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.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=986974&gt;

Notes