openSUSE Security Update : xen (openSUSE-2018-169) (Meltdown) (Spectre)

High Nessus Plugin ID 106864

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VPR Score: 7.9

Synopsis

The remote openSUSE host is missing a security update.

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-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).

- 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).

These non-security issues were fixed :

- bsc#1067317: pass cache=writeback|unsafe|directsync to qemu depending on the libxl disk settings

- bsc#1051729: Prevent invalid symlinks after install of SLES 12 SP2

- bsc#1035442: Increased the value of LIBXL_DESTROY_TIMEOUT from 10 to 100 seconds. If many domUs shutdown in parallel the backends couldn't keep up

- bsc#1027519: Added several upstream patches This update was imported from the SUSE:SLE-12-SP3: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=1035442

https://bugzilla.opensuse.org/show_bug.cgi?id=1051729

https://bugzilla.opensuse.org/show_bug.cgi?id=1061081

https://bugzilla.opensuse.org/show_bug.cgi?id=1067317

https://bugzilla.opensuse.org/show_bug.cgi?id=1068032

https://bugzilla.opensuse.org/show_bug.cgi?id=1070158

https://bugzilla.opensuse.org/show_bug.cgi?id=1070159

https://bugzilla.opensuse.org/show_bug.cgi?id=1070160

https://bugzilla.opensuse.org/show_bug.cgi?id=1070163

https://bugzilla.opensuse.org/show_bug.cgi?id=1074562

https://bugzilla.opensuse.org/show_bug.cgi?id=1076116

https://bugzilla.opensuse.org/show_bug.cgi?id=1076180

Plugin Details

Severity: High

ID: 106864

File Name: openSUSE-2018-169.nasl

Version: 3.6

Type: local

Agent: unix

Published: 2018/02/16

Updated: 2020/06/04

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 7.9

CVSS v2.0

Base Score: 7.2

Temporal Score: 6.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:H/RL:OF/RC:C

CVSS v3.0

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: CVSS:3.0/E:H/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-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:42.3

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/02/16

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