Sicherheit: Mehrere Probleme in Xen

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SUSE Security Update: Security update for xen
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Announcement ID: SUSE-SU-2018:0678-1
Rating: important
References: #1024307 #1030144 #1061081 #1068032 #1070158
#1070159 #1070160 #1070163 #1074562 #1076116
#1076180 #1080635 #1080662
Cross-References: CVE-2017-11334 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-2017-5898 CVE-2018-5683
CVE-2018-7540 CVE-2018-7541
Affected Products:
SUSE Linux Enterprise Server 11-SP3-LTSS
SUSE Linux Enterprise Point of Sale 11-SP3
SUSE Linux Enterprise Debuginfo 11-SP3
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An update that fixes 14 vulnerabilities is now available.

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).
- CVE-2017-5898: The CCID Card device emulator support was vulnerable to
an integer overflow flaw allowing a privileged user to crash the Qemu
process on the host resulting in DoS (bsc#1024307)
- Unprivileged domains could have issued well-timed writes to xenstore
which conflict with transactions to stall progress of the control domain
or driver domain, possibly leading to DoS (bsc#1030144, XSA-206).

Patch Instructions:

To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product:

- SUSE Linux Enterprise Server 11-SP3-LTSS:

zypper in -t patch slessp3-xen-13511=1

- SUSE Linux Enterprise Point of Sale 11-SP3:

zypper in -t patch sleposp3-xen-13511=1

- SUSE Linux Enterprise Debuginfo 11-SP3:

zypper in -t patch dbgsp3-xen-13511=1

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

Package List:

- SUSE Linux Enterprise Server 11-SP3-LTSS (i586 x86_64):

xen-kmp-default-4.2.5_21_3.0.101_0.47.106.14-45.19.1
xen-libs-4.2.5_21-45.19.1
xen-tools-domU-4.2.5_21-45.19.1

- SUSE Linux Enterprise Server 11-SP3-LTSS (x86_64):

xen-4.2.5_21-45.19.1
xen-doc-html-4.2.5_21-45.19.1
xen-doc-pdf-4.2.5_21-45.19.1
xen-libs-32bit-4.2.5_21-45.19.1
xen-tools-4.2.5_21-45.19.1

- SUSE Linux Enterprise Server 11-SP3-LTSS (i586):

xen-kmp-pae-4.2.5_21_3.0.101_0.47.106.14-45.19.1

- SUSE Linux Enterprise Point of Sale 11-SP3 (i586):

xen-kmp-default-4.2.5_21_3.0.101_0.47.106.14-45.19.1
xen-kmp-pae-4.2.5_21_3.0.101_0.47.106.14-45.19.1
xen-libs-4.2.5_21-45.19.1
xen-tools-domU-4.2.5_21-45.19.1

- SUSE Linux Enterprise Debuginfo 11-SP3 (i586 x86_64):

xen-debuginfo-4.2.5_21-45.19.1
xen-debugsource-4.2.5_21-45.19.1

References:

https://www.suse.com/security/cve/CVE-2017-11334.html
https://www.suse.com/security/cve/CVE-2017-15595.html
https://www.suse.com/security/cve/CVE-2017-17563.html
https://www.suse.com/security/cve/CVE-2017-17564.html
https://www.suse.com/security/cve/CVE-2017-17565.html
https://www.suse.com/security/cve/CVE-2017-17566.html
https://www.suse.com/security/cve/CVE-2017-18030.html
https://www.suse.com/security/cve/CVE-2017-5715.html
https://www.suse.com/security/cve/CVE-2017-5753.html
https://www.suse.com/security/cve/CVE-2017-5754.html
https://www.suse.com/security/cve/CVE-2017-5898.html
https://www.suse.com/security/cve/CVE-2018-5683.html
https://www.suse.com/security/cve/CVE-2018-7540.html
https://www.suse.com/security/cve/CVE-2018-7541.html
https://bugzilla.suse.com/1024307
https://bugzilla.suse.com/1030144
https://bugzilla.suse.com/1061081
https://bugzilla.suse.com/1068032
https://bugzilla.suse.com/1070158
https://bugzilla.suse.com/1070159
https://bugzilla.suse.com/1070160
https://bugzilla.suse.com/1070163
https://bugzilla.suse.com/1074562
https://bugzilla.suse.com/1076116
https://bugzilla.suse.com/1076180
https://bugzilla.suse.com/1080635
https://bugzilla.suse.com/1080662

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