CVE-2020-25660

A flaw was found in the Cephx authentication protocol in versions before
15.2.6 and before 14.2.14, where it does not verify Ceph clients correctly
and is then vulnerable to replay attacks in Nautilus. This flaw allows an
attacker with access to the Ceph cluster network to authenticate with the
Ceph service via a packet sniffer and perform actions allowed by the Ceph
service. This issue is a reintroduction of CVE-2018-1128, affecting the
msgr2 protocol. The msgr 2 protocol is used for all communication except
older clients that do not support the msgr2 protocol. The msgr1 protocol is
not affected. The highest threat from this vulnerability is to
confidentiality, integrity, and system availability.

Notes