It was found that cephx authentication protocol did not verify ceph clients correctly and was vulnerable to replay attack. Any attacker having access to ceph cluster network who is able to sniff packets on network can use this vulnerability to authenticate with ceph service and perform actions allowed by ceph service. Ceph branches master, mimic, luminous and jewel are believed to be vulnerable.
lists.opensuse.org/opensuse-security-announce/2019-04/msg00100.html
tracker.ceph.com/issues/24836
www.openwall.com/lists/oss-security/2020/11/17/3
www.openwall.com/lists/oss-security/2020/11/17/4
access.redhat.com/errata/RHSA-2018:2177
access.redhat.com/errata/RHSA-2018:2179
access.redhat.com/errata/RHSA-2018:2261
access.redhat.com/errata/RHSA-2018:2274
bugzilla.redhat.com/show_bug.cgi?id=1575866
github.com/ceph/ceph/commit/5ead97120e07054d80623dada90a5cc764c28468
lists.debian.org/debian-lts-announce/2019/03/msg00017.html
www.debian.org/security/2018/dsa-4339