SUSE Security Update: Security update for xen
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Announcement ID: SUSE-SU-2018:0638-1
Rating: important
References: #1027519 #1031382 #1035442 #1061081 #1068032
#1070158 #1070159 #1070160 #1070163 #1074562
#1076116 #1076180 #1080635 #1080662
Cross-References: 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
Affected Products:
SUSE Linux Enterprise Software Development Kit 11-SP4
SUSE Linux Enterprise Server 11-SP4
SUSE Linux Enterprise Debuginfo 11-SP4
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An update that solves 10 vulnerabilities and has four fixes
is now available.
Description:
This update for xen fixes several issues.
This new feature was included:
– add script and sysv service to watch for vcpu online/offline events in a
HVM domU
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).
These non-security issues were fixed:
– 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#1031382: Prevent VMs from crashing when migrating between dom0 hosts
in case read() returns zero on the receiver side.
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 Software Development Kit 11-SP4:
zypper in -t patch sdksp4-xen-13501=1
– SUSE Linux Enterprise Server 11-SP4:
zypper in -t patch slessp4-xen-13501=1
– SUSE Linux Enterprise Debuginfo 11-SP4:
zypper in -t patch dbgsp4-xen-13501=1
To bring your system up-to-date, use “zypper patch”.
Package List:
– SUSE Linux Enterprise Software Development Kit 11-SP4 (i586 x86_64):
xen-devel-4.4.4_28-61.23.2
– SUSE Linux Enterprise Server 11-SP4 (i586 x86_64):
xen-kmp-default-4.4.4_28_3.0.101_108.35-61.23.2
xen-libs-4.4.4_28-61.23.2
xen-tools-domU-4.4.4_28-61.23.2
– SUSE Linux Enterprise Server 11-SP4 (x86_64):
xen-4.4.4_28-61.23.2
xen-doc-html-4.4.4_28-61.23.2
xen-libs-32bit-4.4.4_28-61.23.2
xen-tools-4.4.4_28-61.23.2
– SUSE Linux Enterprise Server 11-SP4 (i586):
xen-kmp-pae-4.4.4_28_3.0.101_108.35-61.23.2
– SUSE Linux Enterprise Debuginfo 11-SP4 (i586 x86_64):
xen-debuginfo-4.4.4_28-61.23.2
xen-debugsource-4.4.4_28-61.23.2
References:
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-2018-5683.html
https://bugzilla.suse.com/1027519
https://bugzilla.suse.com/1031382
https://bugzilla.suse.com/1035442
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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