CVE-2018-19965

MEDIUM

Description

An issue was discovered in Xen through 4.11.x allowing 64-bit PV guest OS users to cause a denial of service (host OS crash) because #GP[0] can occur after a non-canonical address is passed to the TLB flushing code. NOTE: this issue exists because of an incorrect CVE-2017-5754 (aka Meltdown) mitigation.

References

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

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

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

https://support.citrix.com/article/CTX239432

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

https://xenbits.xen.org/xsa/advisory-279.html

Details

Source: MITRE

Published: 2018-12-08

Updated: 2019-04-17

Type: CWE-171

Risk Information

CVSS v2.0

Base Score: 4.7

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

Impact Score: 6.9

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3.0

Base Score: 5.6

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

Impact Score: 4

Exploitability Score: 1.1

Severity: MEDIUM