openSUSE Security Update : xen (openSUSE-2019-2508)

critical Nessus Plugin ID 131062

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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 openSUSE host is missing a security update.

Description

This update for xen fixes the following issues :

- CVE-2018-12207: Untrusted virtual machines on Intel CPUs could exploit a race condition in the Instruction Fetch Unit of the Intel CPU to cause a Machine Exception during Page Size Change, causing the CPU core to be non-functional. (bsc#1155945)

- CVE-2019-11135: Aborting an asynchronous TSX operation on Intel CPUs with Transactional Memory support could be used to facilitate sidechannel information leaks out of microarchitectural buffers, similar to the previously described 'Microarchitectural Data Sampling' attack.
(bsc#1152497).

- CVE-2019-18423: A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). (bsc#1154460).

- CVE-2019-18422: A malicious ARM guest might contrive to arrange for critical Xen code to run with interrupts erroneously enabled. This could lead to data corruption, denial of service, or possibly even privilege escalation. However a precise attack technique has not been identified. (bsc#1154464)

- CVE-2019-18424: An untrusted domain with access to a physical device can DMA into host memory, leading to privilege escalation. (bsc#1154461).

- CVE-2019-18421: A malicious PV guest administrator may have been able to escalate their privilege to that of the host. (bsc#1154458).

- CVE-2019-18425: 32-bit PV guest user mode could elevate its privileges to that of the guest kernel.
(bsc#1154456).

- CVE-2019-18420: Malicious x86 PV guests may have caused a hypervisor crash, resulting in a Denial of Service (Dos). (bsc#1154448)

- Upstream bug fixes (bsc#1027519)

This update was imported from the SUSE:SLE-15-SP1:Update update project.

Solution

Update the affected xen packages.

See Also

https://bugzilla.opensuse.org/show_bug.cgi?id=1027519

https://bugzilla.opensuse.org/show_bug.cgi?id=1152497

https://bugzilla.opensuse.org/show_bug.cgi?id=1154448

https://bugzilla.opensuse.org/show_bug.cgi?id=1154456

https://bugzilla.opensuse.org/show_bug.cgi?id=1154458

https://bugzilla.opensuse.org/show_bug.cgi?id=1154460

https://bugzilla.opensuse.org/show_bug.cgi?id=1154461

https://bugzilla.opensuse.org/show_bug.cgi?id=1154464

https://bugzilla.opensuse.org/show_bug.cgi?id=1155945

Plugin Details

Severity: Critical

ID: 131062

File Name: openSUSE-2019-2508.nasl

Version: 1.4

Type: local

Agent: unix

Published: 11/15/2019

Updated: 7/10/2020

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: High

Score: 7.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

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

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:opensuse:xen, p-cpe:/a:novell:opensuse:xen-debugsource, p-cpe:/a:novell:opensuse:xen-devel, p-cpe:/a:novell:opensuse:xen-doc-html, p-cpe:/a:novell:opensuse:xen-libs, p-cpe:/a:novell:opensuse:xen-libs-32bit, p-cpe:/a:novell:opensuse:xen-libs-32bit-debuginfo, p-cpe:/a:novell:opensuse:xen-libs-debuginfo, p-cpe:/a:novell:opensuse:xen-tools, p-cpe:/a:novell:opensuse:xen-tools-debuginfo, p-cpe:/a:novell:opensuse:xen-tools-domU, p-cpe:/a:novell:opensuse:xen-tools-domU-debuginfo, cpe:/o:novell:opensuse:15.1

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/14/2019

Vulnerability Publication Date: 10/31/2019

Reference Information

CVE: CVE-2018-12207, CVE-2019-11135, CVE-2019-18420, CVE-2019-18421, CVE-2019-18422, CVE-2019-18423, CVE-2019-18424, CVE-2019-18425

IAVB: 2019-B-0084-S