SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2018:1981-1)

critical Nessus Plugin ID 120050
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote SUSE host is missing one or more security updates.

Description

This update for xen fixes the following issues: Security issues fixed :

- CVE-2018-3665: Fix Lazy FP Save/Restore issue (XSA-267) (bsc#1095242).

- CVE-2018-12891: Fix possible Denial of Service (DoS) via certain PV MMU operations that affect the entire host (XSA-264) (bsc#1097521).

- CVE-2018-12892: Fix libxl to honour the readonly flag on HVM emulated SCSI disks (XSA-266) (bsc#1097523).

- CVE-2018-12893: Fix crash/Denial of Service (DoS) via safety check (XSA-265) (bsc#1097522). Bug fixes :

- bsc#1027519: Add upstream patches from January.

- bsc#1098403: Fix regression introduced by changes for bsc#1079730. A PV domU without qcow2 and/or vfb has no qemu attached. Ignore QMP errors for PV domUs to handle PV domUs with and without an attached qemu-xen.

- bsc#1087289: Fix xen scheduler crash.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Module for Server Applications 15:zypper in -t patch SUSE-SLE-Module-Server-Applications-15-2018-1342=1

SUSE Linux Enterprise Module for Basesystem 15:zypper in -t patch SUSE-SLE-Module-Basesystem-15-2018-1342=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1027519

https://bugzilla.suse.com/show_bug.cgi?id=1079730

https://bugzilla.suse.com/show_bug.cgi?id=1087289

https://bugzilla.suse.com/show_bug.cgi?id=1095242

https://bugzilla.suse.com/show_bug.cgi?id=1097521

https://bugzilla.suse.com/show_bug.cgi?id=1097522

https://bugzilla.suse.com/show_bug.cgi?id=1097523

https://bugzilla.suse.com/show_bug.cgi?id=1098403

https://www.suse.com/security/cve/CVE-2018-12891/

https://www.suse.com/security/cve/CVE-2018-12892/

https://www.suse.com/security/cve/CVE-2018-12893/

https://www.suse.com/security/cve/CVE-2018-3665/

http://www.nessus.org/u?ecdb4e38

Plugin Details

Severity: Critical

ID: 120050

File Name: suse_SU-2018-1981-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 1/2/2019

Updated: 1/13/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.9

Temporal Score: 8.6

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:xen, p-cpe:/a:novell:suse_linux:xen-debugsource, p-cpe:/a:novell:suse_linux:xen-devel, p-cpe:/a:novell:suse_linux:xen-libs, p-cpe:/a:novell:suse_linux:xen-libs-debuginfo, p-cpe:/a:novell:suse_linux:xen-tools, p-cpe:/a:novell:suse_linux:xen-tools-debuginfo, p-cpe:/a:novell:suse_linux:xen-tools-domU, p-cpe:/a:novell:suse_linux:xen-tools-domU-debuginfo, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 7/17/2018

Vulnerability Publication Date: 6/21/2018

Reference Information

CVE: CVE-2018-12891, CVE-2018-12892, CVE-2018-12893, CVE-2018-3665