CVE-2018-5244

MEDIUM

Description

In Xen 4.10, new infrastructure was introduced as part of an overhaul to how MSR emulation happens for guests. Unfortunately, one tracking structure isn't freed when a vcpu is destroyed. This allows guest OS administrators to cause a denial of service (host OS memory consumption) by rebooting many times.

References

http://www.securityfocus.com/bid/102433

http://www.securitytracker.com/id/1040774

https://security.gentoo.org/glsa/201810-06

https://xenbits.xen.org/xsa/advisory-253.html

Details

Source: MITRE

Published: 2018-01-05

Updated: 2018-10-31

Type: CWE-119

Risk Information

CVSS v2.0

Base Score: 4.9

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

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3.0

Base Score: 6.5

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

Impact Score: 4

Exploitability Score: 2

Severity: MEDIUM