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Sicherheit: Mehrere Probleme in xen
Aktuelle Meldungen Distributionen
Name: Mehrere Probleme in xen
ID: SUSE-SU-2018:2528-1
Distribution: SUSE
Plattformen: SUSE Linux Enterprise Debuginfo 11-SP3, SUSE Linux Enterprise Server 11-SP3-LTSS, SUSE Linux Enterprise Point of Sale 11-SP3
Datum: Mo, 27. August 2018, 22:49
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3639
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10982
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12617
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5754
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3665
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12891
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3646
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5753
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5715
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12893
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10981
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11806
Applikationen: Xen

Originalnachricht

   SUSE Security Update: Security update for xen
______________________________________________________________________________

Announcement ID: SUSE-SU-2018:2528-1
Rating: important
References: #1027519 #1074562 #1079730 #1090822 #1090823
#1091107 #1092631 #1095242 #1096224 #1097206
#1097521 #1097522 #1098744
Cross-References: CVE-2017-5715 CVE-2017-5753 CVE-2017-5754
CVE-2018-10981 CVE-2018-10982 CVE-2018-11806
CVE-2018-12617 CVE-2018-12891 CVE-2018-12893
CVE-2018-3639 CVE-2018-3646 CVE-2018-3665

Affected Products:
SUSE Linux Enterprise Server 11-SP3-LTSS
SUSE Linux Enterprise Point of Sale 11-SP3
SUSE Linux Enterprise Debuginfo 11-SP3
______________________________________________________________________________

An update that solves 12 vulnerabilities and has one errata
is now available.

Description:


This update for xen fixes the following issues:

These security issue were fixed:

- CVE-2018-3646: Systems with microprocessors utilizing speculative
execution and address translations may have allowed unauthorized
disclosure of information residing in the L1 data cache to an attacker
with local user access with guest OS privilege via a terminal page fault
and a side-channel analysis (bsc#1091107, bsc#1027519).
- CVE-2018-12617: An integer overflow that could cause a segmentation
fault in qmp_guest_file_read() with g_malloc() in qemu-guest-agent was
fixed (bsc#1098744)
- CVE-2018-3665: System software utilizing Lazy FP state restore technique
on systems using Intel Core-based microprocessors may potentially allow
a local process to infer data from another process through a
speculative execution side channel. (bsc#1095242)
- CVE-2018-3639: Systems with microprocessors utilizing speculative
execution and speculative execution of memory reads before the addresses
of all prior memory writes are known may allow unauthorized disclosure
of information to an attacker with local user access via a side-channel
analysis, aka Speculative Store Bypass (SSB), Variant 4. (bsc#1092631)
- CVE-2017-5715: Systems with microprocessors utilizing speculative
execution and indirect branch prediction may allow unauthorized
disclosure
of information to an attacker with local user access via a side-channel
analysis. (bsc#1074562)
- CVE-2017-5753: Systems with microprocessors utilizing speculative
execution and branch prediction may allow unauthorized disclosure of
information to an attacker with local user access via a side-channel
analysis. (bsc#1074562)
- CVE-2017-5754: Systems with microprocessors utilizing speculative
execution and indirect branch prediction may allow unauthorized
disclosure
of information to an attacker with local user access via a side-channel
analysis of the data cache. (bsc#1074562)
- CVE-2018-12891: Certain PV MMU operations may take a long time to
process. For that reason Xen explicitly checks for the need to preempt
the current vCPU at certain points. A few rarely taken code paths did
bypass such checks. By suitably enforcing the conditions through its own
page table contents, a malicious guest may cause such bypasses to be
used for an unbounded number of iterations. A malicious or buggy PV
guest may cause a Denial of Service (DoS) affecting the entire host.
Specifically, it may prevent use of a physical CPU for an indeterminate
period of time. (bsc#1097521)
- CVE-2018-12893: One of the fixes in XSA-260 added some safety checks to
help prevent Xen livelocking with debug exceptions. Unfortunately, due
to an oversight, at least one of these safety checks can be triggered by
a guest. A malicious PV guest can crash Xen, leading to a Denial of
Service. Only x86 PV guests can exploit the vulnerability. x86 HVM and
PVH guests cannot exploit the vulnerability. An attacker needs to be
able to control hardware debugging facilities to exploit the
vulnerability, but such permissions are typically available to
unprivileged users. (bsc#1097522)
- CVE-2018-11806: m_cat in slirp/mbuf.c in Qemu has a heap-based buffer
overflow via incoming fragmented datagrams. (bsc#1096224)
- CVE-2018-10982: An issue was discovered in Xen allowed x86 HVM guest OS
users to cause a denial of service (unexpectedly high interrupt number,
array overrun, and hypervisor crash) or possibly gain hypervisor
privileges by setting up an HPET timer to deliver interrupts in IO-APIC
mode, aka vHPET interrupt injection. (bsc#1090822)
- CVE-2018-10981: An issue was discovered in Xen that allowed x86 HVM
guest OS users to cause a denial of service (host OS infinite loop) in
situations where a QEMU device model attempts to make invalid
transitions between states of a request. (bsc#1090823)

Following bugs were fixed:

- After updating to kernel 3.0.101-0.47.106.32-xen system crashes in
check_bugs() (bsc#1097206)
- bsc#1079730 - in xen-kmp, unplug emulated devices after migration This
is required since xen-4.10 and/or qemu-2.10 because the state
of unplug is not propagated from one dom0 to another. Without this
unplug qemu's block-backend will be unable to open qcow2 disks on the
receiving dom0


Patch Instructions:

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 Server 11-SP3-LTSS:

zypper in -t patch slessp3-xen-13752=1

- SUSE Linux Enterprise Point of Sale 11-SP3:

zypper in -t patch sleposp3-xen-13752=1

- SUSE Linux Enterprise Debuginfo 11-SP3:

zypper in -t patch dbgsp3-xen-13752=1



Package List:

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

xen-kmp-default-4.2.5_21_3.0.101_0.47.106.43-45.25.1
xen-libs-4.2.5_21-45.25.1
xen-tools-domU-4.2.5_21-45.25.1

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

xen-4.2.5_21-45.25.1
xen-doc-html-4.2.5_21-45.25.1
xen-doc-pdf-4.2.5_21-45.25.1
xen-libs-32bit-4.2.5_21-45.25.1
xen-tools-4.2.5_21-45.25.1

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

xen-kmp-pae-4.2.5_21_3.0.101_0.47.106.43-45.25.1

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

xen-kmp-default-4.2.5_21_3.0.101_0.47.106.43-45.25.1
xen-kmp-pae-4.2.5_21_3.0.101_0.47.106.43-45.25.1
xen-libs-4.2.5_21-45.25.1
xen-tools-domU-4.2.5_21-45.25.1

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

xen-debuginfo-4.2.5_21-45.25.1
xen-debugsource-4.2.5_21-45.25.1


References:

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-2018-10981.html
https://www.suse.com/security/cve/CVE-2018-10982.html
https://www.suse.com/security/cve/CVE-2018-11806.html
https://www.suse.com/security/cve/CVE-2018-12617.html
https://www.suse.com/security/cve/CVE-2018-12891.html
https://www.suse.com/security/cve/CVE-2018-12893.html
https://www.suse.com/security/cve/CVE-2018-3639.html
https://www.suse.com/security/cve/CVE-2018-3646.html
https://www.suse.com/security/cve/CVE-2018-3665.html
https://bugzilla.suse.com/1027519
https://bugzilla.suse.com/1074562
https://bugzilla.suse.com/1079730
https://bugzilla.suse.com/1090822
https://bugzilla.suse.com/1090823
https://bugzilla.suse.com/1091107
https://bugzilla.suse.com/1092631
https://bugzilla.suse.com/1095242
https://bugzilla.suse.com/1096224
https://bugzilla.suse.com/1097206
https://bugzilla.suse.com/1097521
https://bugzilla.suse.com/1097522
https://bugzilla.suse.com/1098744

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