CVE-2018-19966

HIGH

Description

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service (host OS crash) or possibly gain host OS privileges because of an interpretation conflict for a union data structure associated with shadow paging. NOTE: this issue exists because of an incorrect fix for CVE-2017-15595.

References

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html

http://www.securityfocus.com/bid/106182

https://lists.debian.org/debian-lts-announce/2019/10/msg00008.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/UXC6BME7SXJI2ZIATNXCAH7RGPI4UKTT/

https://www.debian.org/security/2019/dsa-4369

https://xenbits.xen.org/xsa/advisory-280.html

Details

Source: MITRE

Published: 2018-12-08

Updated: 2019-10-03

Type: CWE-436

Risk Information

CVSS v2.0

Base Score: 7.2

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3.0

Base Score: 8.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Impact Score: 6

Exploitability Score: 2

Severity: HIGH