SUSE SLES12 Security Update : xen (SUSE-SU-2018:0601-1) (Meltdown) (Spectre)

high Nessus Plugin ID 107140
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 several issues. These security issues were fixed :

 - CVE-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent information leaks via side effects of speculative execution, aka 'Spectre' and 'Meltdown' attacks (bsc#1074562, bsc#1068032)

 - CVE-2018-5683: The vga_draw_text function allowed local OS guest privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) by leveraging improper memory address validation (bsc#1076116).

 - CVE-2017-18030: The cirrus_invalidate_region function allowed local OS guest privileged users to cause a denial of service (out-of-bounds array access and QEMU process crash) via vectors related to negative pitch (bsc#1076180).

 - CVE-2017-15595: x86 PV guest OS users were able to cause a DoS (unbounded recursion, stack consumption, and hypervisor crash) or possibly gain privileges via crafted page-table stacking (bsc#1061081)

 - CVE-2017-17566: Prevent PV guest OS users to cause a denial of service (host OS crash) or gain host OS privileges in shadow mode by mapping a certain auxiliary page (bsc#1070158).

 - CVE-2017-17563: Prevent guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode (bsc#1070159).

 - CVE-2017-17564: Prevent guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging incorrect error handling for reference counting in shadow mode (bsc#1070160).

 - CVE-2017-17565: Prevent PV guest OS users to cause a denial of service (host OS crash) if shadow mode and log-dirty mode are in place, because of an incorrect assertion related to M2P (bsc#1070163).

 - Added missing intermediate preemption checks for guest requesting removal of memory. This allowed malicious guest administrator to cause denial of service due to the high cost of this operation (bsc#1080635).

 - Because of XEN not returning the proper error messages when transitioning grant tables from v2 to v1 a malicious guest was able to cause DoS or potentially allowed for privilege escalation as well as information leaks (bsc#1080662).

The update package also includes non-security fixes. See advisory for details.

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 YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server 12-LTSS:zypper in -t patch SUSE-SLE-SERVER-12-2018-408=1

To bring your system up-to-date, use 'zypper patch'.

See Also

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

https://bugzilla.suse.com/show_bug.cgi?id=1035442

https://bugzilla.suse.com/show_bug.cgi?id=1061081

https://bugzilla.suse.com/show_bug.cgi?id=1068032

https://bugzilla.suse.com/show_bug.cgi?id=1070158

https://bugzilla.suse.com/show_bug.cgi?id=1070159

https://bugzilla.suse.com/show_bug.cgi?id=1070160

https://bugzilla.suse.com/show_bug.cgi?id=1070163

https://bugzilla.suse.com/show_bug.cgi?id=1074562

https://bugzilla.suse.com/show_bug.cgi?id=1076116

https://bugzilla.suse.com/show_bug.cgi?id=1076180

https://bugzilla.suse.com/show_bug.cgi?id=1080635

https://bugzilla.suse.com/show_bug.cgi?id=1080662

https://www.suse.com/security/cve/CVE-2017-15595/

https://www.suse.com/security/cve/CVE-2017-17563/

https://www.suse.com/security/cve/CVE-2017-17564/

https://www.suse.com/security/cve/CVE-2017-17565/

https://www.suse.com/security/cve/CVE-2017-17566/

https://www.suse.com/security/cve/CVE-2017-18030/

https://www.suse.com/security/cve/CVE-2017-5715/

https://www.suse.com/security/cve/CVE-2017-5753/

https://www.suse.com/security/cve/CVE-2017-5754/

https://www.suse.com/security/cve/CVE-2018-5683/

http://www.nessus.org/u?4fb6a4ae

Plugin Details

Severity: High

ID: 107140

File Name: suse_SU-2018-0601-1.nasl

Version: 3.7

Type: local

Agent: unix

Published: 3/6/2018

Updated: 9/10/2019

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

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

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 8.4

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

Temporal Vector: E:H/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-doc-html, p-cpe:/a:novell:suse_linux:xen-kmp-default, p-cpe:/a:novell:suse_linux:xen-kmp-default-debuginfo, 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:12

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/5/2018

Vulnerability Publication Date: 10/18/2017

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2017-15595, CVE-2017-17563, CVE-2017-17564, CVE-2017-17565, CVE-2017-17566, CVE-2017-18030, CVE-2017-5715, CVE-2017-5753, CVE-2017-5754, CVE-2018-5683

IAVA: 2018-A-0019, 2018-A-0020