CVE-2018-5244

Upstream information

CVE-2018-5244 at MITRE

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.

---

SUSE information

Overall state of this security issue: Does not affect SUSE products

This issue is currently rated as having moderate severity.

CVSS v2 Scores

	National Vulnerability Database
Base Score	4.9
Vector	AV:L/AC:L/Au:N/C:N/I:N/A:C
Access Vector	Local
Access Complexity	Low
Authentication	None
Confidentiality Impact	None
Integrity Impact	None
Availability Impact	Complete

CVSS v3 Scores

	National Vulnerability Database	SUSE
Base Score	6.5	4
Vector	AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H	AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Access Vector	Local	Local
Access Complexity	Low	Low
Privileges Required	Low	None
User Interaction	None	None
Scope	Changed	Unchanged
Confidentiality Impact	None	None
Integrity Impact	None	None
Availability Impact	High	Low

SUSE Bugzilla entries: 1073961 [RESOLVED / FIXED], 1074966 [RESOLVED / DUPLICATE]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s)	Fixed package version(s)	References
SUSE Linux Enterprise Module for Basesystem 15	xen-libs >= 4.10.1_04-1.4 xen-tools-domU >= 4.10.1_04-1.4	Patchnames: SUSE Linux Enterprise Module for Basesystem 15 GA xen-libs
SUSE Linux Enterprise Module for Server Applications 15	xen >= 4.10.1_04-1.4 xen-devel >= 4.10.1_04-1.4 xen-tools >= 4.10.1_04-1.4	Patchnames: SUSE Linux Enterprise Module for Server Applications 15 GA xen
openSUSE Leap 15.0	xen-libs >= 4.10.0_20-lp150.1.2	Patchnames: openSUSE Leap 15.0 GA xen-libs

---

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s)	Source package	State
CaaS Platform 2.0	xen	Not affected
SUSE Linux Enterprise Desktop 12 SP2	xen	Not affected
SUSE Linux Enterprise Desktop 12 SP3	xen	Not affected
SUSE Linux Enterprise SDK 11 SP4	xen	Not affected
SUSE Linux Enterprise SDK 12 SP2	xen	Not affected
SUSE Linux Enterprise SDK 12 SP3	xen	Not affected
SUSE Linux Enterprise Server 11 SP4	xen	Not affected
SUSE Linux Enterprise Server 12 SP2	xen	Not affected
SUSE Linux Enterprise Server 12 SP3	xen	Not affected