CVE-2018-5244

2018-01-0518:29:00

Debian Security Bug Tracker

security-tracker.debian.org

4.9 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

6.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

25.1%

JSON

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.

OSVersionArchitecturePackageVersionFilename
Debian12allxen< 4.17.3+10-g091466ba55-1~deb12u1xen_4.17.3+10-g091466ba55-1~deb12u1_all.deb
Debian11allxen< 4.14.6-1xen_4.14.6-1_all.deb
Debian999allxen< 4.17.3+36-g54dacb5c02-1xen_4.17.3+36-g54dacb5c02-1_all.deb
Debian13allxen< 4.17.3+36-g54dacb5c02-1xen_4.17.3+36-g54dacb5c02-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	xen	< 4.17.3+10-g091466ba55-1~deb12u1	xen_4.17.3+10-g091466ba55-1~deb12u1_all.deb
Debian	11	all	xen	< 4.14.6-1	xen_4.14.6-1_all.deb
Debian	999	all	xen	< 4.17.3+36-g54dacb5c02-1	xen_4.17.3+36-g54dacb5c02-1_all.deb
Debian	13	all	xen	< 4.17.3+36-g54dacb5c02-1	xen_4.17.3+36-g54dacb5c02-1_all.deb