An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users (in certain configurations) to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot.
http://www.securityfocus.com/bid/104002
https://lists.debian.org/debian-lts-announce/2018/10/msg00021.html
https://security.gentoo.org/glsa/201810-06
Source: MITRE
Published: 2018-04-27
Updated: 2018-10-31
Type: CWE-200
Base Score: 1.9
Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 3.4
Severity: LOW
Base Score: 5.6
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Impact Score: 4
Exploitability Score: 1.1
Severity: MEDIUM