SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2018:4300-1) (Foreshadow)

high Nessus Plugin ID 120196
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 :

Update to Xen 4.10.2 bug fix release (bsc#1027519).

Security vulnerabilities fixed :

CVE-2018-19961, CVE-2018-19962: Fixed an issue related to insufficient TLB flushing with AMD IOMMUs, which potentially allowed a guest to escalate its privileges, may cause a Denial of Service (DoS) affecting the entire host, or may be able to access data it is not supposed to access. (XSA-275) (bsc#1115040)

CVE-2018-19965: Fixed an issue related to the INVPCID instruction in case non-canonical addresses are accessed, which may allow a guest to cause Xen to crash, resulting in a Denial of Service (DoS) affecting the entire host. (XSA-279) (bsc#1115045)

CVE-2018-19966: Fixed an issue related to a previous fix for XSA-240, which conflicted with shadow paging and allowed a guest to cause Xen to crash, resulting in a Denial of Service (DoS). (XSA-280) (bsc#1115047)

CVE-2018-18883: Fixed an issue related to inproper restriction of nested VT-x, which allowed a guest to cause Xen to crash, resulting in a Denial of Service (DoS). (XSA-278) (bsc#1114405)

CVE-2018-15468: Fixed incorrect MSR_DEBUGCTL handling, which allowed guests to enable Branch Trace Store and may cause a Denial of Service (DoS) of the entire host. (XSA-269) (bsc#1103276)

CVE-2018-15469: Fixed use of v2 grant tables on ARM, which were not properly implemented and may cause a Denial of Service (DoS).
(XSA-268) (bsc#1103275)

CVE-2018-15470: Fixed an issue in the logic in oxenstored for handling writes, which allowed a guest to write memory unbounded leading to system-wide Denial of Service (DoS). (XSA-272) (bsc#1103279)

CVE-2018-3646: Mitigations for VMM aspects of L1 Terminal Fault (XSA-273) (bsc#1091107)

Other bugs fixed: Fixed an issue related to a domU hang on SLE12-SP3 HV (bsc#1108940)

Fixed an issue with xpti=no-dom0 not working as expected (bsc#1105528)

Fixed a kernel oops related to fs/dcache.c called by d_materialise_unique() (bsc#1094508)

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-15-2018-3063=1

SUSE Linux Enterprise Module for Basesystem 15:zypper in -t patch SUSE-SLE-Module-Basesystem-15-2018-3063=1

See Also

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

https://bugzilla.suse.com/show_bug.cgi?id=1078292

https://bugzilla.suse.com/show_bug.cgi?id=1091107

https://bugzilla.suse.com/show_bug.cgi?id=1094508

https://bugzilla.suse.com/show_bug.cgi?id=1103275

https://bugzilla.suse.com/show_bug.cgi?id=1103276

https://bugzilla.suse.com/show_bug.cgi?id=1103279

https://bugzilla.suse.com/show_bug.cgi?id=1105528

https://bugzilla.suse.com/show_bug.cgi?id=1108940

https://bugzilla.suse.com/show_bug.cgi?id=1114405

https://bugzilla.suse.com/show_bug.cgi?id=1115040

https://bugzilla.suse.com/show_bug.cgi?id=1115045

https://bugzilla.suse.com/show_bug.cgi?id=1115047

https://www.suse.com/security/cve/CVE-2018-15468/

https://www.suse.com/security/cve/CVE-2018-15469/

https://www.suse.com/security/cve/CVE-2018-15470/

https://www.suse.com/security/cve/CVE-2018-18883/

https://www.suse.com/security/cve/CVE-2018-19961/

https://www.suse.com/security/cve/CVE-2018-19962/

https://www.suse.com/security/cve/CVE-2018-19965/

https://www.suse.com/security/cve/CVE-2018-19966/

https://www.suse.com/security/cve/CVE-2018-3646/

http://www.nessus.org/u?3af96718

Plugin Details

Severity: High

ID: 120196

File Name: suse_SU-2018-4300-1.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: High

Base Score: 7.2

Temporal Score: 5.3

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

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

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:L/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: 12/28/2018

Vulnerability Publication Date: 8/14/2018

Reference Information

CVE: CVE-2018-15468, CVE-2018-15469, CVE-2018-15470, CVE-2018-18883, CVE-2018-19961, CVE-2018-19962, CVE-2018-19965, CVE-2018-19966, CVE-2018-3646