LOW
A flaw was found in the way signature calculation was handled by cephx authentication protocol. An attacker having access to ceph cluster network who is able to alter the message payload was able to bypass signature checks done by cephx protocol. Ceph branches master, mimic, luminous and jewel are believed to be vulnerable.
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00100.html
http://packetstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.html
http://tracker.ceph.com/issues/24837
https://access.redhat.com/errata/RHSA-2018:2177
https://access.redhat.com/errata/RHSA-2018:2179
https://access.redhat.com/errata/RHSA-2018:2261
https://access.redhat.com/errata/RHSA-2018:2274
https://bugzilla.redhat.com/show_bug.cgi?id=1576057
https://github.com/ceph/ceph/commit/8f396cf35a3826044b089141667a196454c0a587
https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
Source: MITRE
Published: 2018-07-10
Updated: 2019-08-29
Type: CWE-287
Base Score: 3.3
Vector: AV:A/AC:L/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 6.5
Severity: LOW
Base Score: 6.5
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 2.8
Severity: MEDIUM