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[security-announce] openSUSE-SU-2019:1226-1: important: Security update for xen
openSUSE Security Update: Security update for xen

Announcement ID: openSUSE-SU-2019:1226-1
Rating: important
References: #1026236 #1027519 #1069468 #1105528 #1114988
#1115040 #1115045 #1115047 #1116380 #1117756
#1119161 #1123157 #1126140 #1126141 #1126192
#1126195 #1126196 #1126197 #1126198 #1126201
#1126325 #1127400 #1129623
Cross-References: CVE-2018-19665 CVE-2018-19961 CVE-2018-19962
CVE-2018-19965 CVE-2018-19966 CVE-2018-19967
CVE-2019-6778 CVE-2019-9824
Affected Products:
openSUSE Leap 42.3

An update that solves 8 vulnerabilities and has 15 fixes is
now available.


This update for xen fixes the following issues:

Security issues fixed:

- CVE-2018-19967: Fixed HLE constructs that allowed guests to lock up the
host, resulting in a Denial of Service (DoS). (XSA-282) (bsc#1114988)
- CVE-2019-6778: Fixed a heap buffer overflow in tcp_emu() found in slirp
- Fixed an issue which could allow malicious or buggy guests with passed
through PCI devices to be able to escalate their privileges, crash the
host, or access data belonging to other guests. Additionally memory
leaks were also possible (bsc#1126140).
- Fixed a race condition issue which could allow malicious PV guests to
escalate their privilege to that
of the hypervisor (bsc#1126141).
- Fixed an issue which could allow a malicious unprivileged guest
userspace process to escalate its privilege to that of other userspace
processes in the same guest and potentially thereby to that
of the guest operating system (bsc#1126201).
- CVE-2019-9824: Fixed an information leak in SLiRP networking
implementation which could allow a user/process to read uninitialised
stack memory contents (bsc#1129623).
- CVE-2018-19961 CVE-2018-19962: Fixed insufficient TLB flushing /
improper large page mappings with AMD IOMMUs (XSA-275)(bsc#1115040).
- CVE-2018-19965: Fixed denial of service issue from attempting to use
INVPCID with a non-canonical addresses (XSA-279)(bsc#1115045).
- CVE-2018-19966: Fixed issue introduced by XSA-240 that could have caused
conflicts with shadow paging (XSA-280)(bsc#1115047).
- Fixed an issue which could allow malicious PV guests may cause a host
crash or gain access to data pertaining to other guests.Additionally,
vulnerable configurations are likely to be unstable even in the absence
of an attack (bsc#1126198).
- Fixed multiple access violations introduced by XENMEM_exchange hypercall
which could allow a single PV guest to leak arbitrary amounts of memory,
leading to a denial of service (bsc#1126192).
- Fixed an issue which could allow malicious 64bit PV guests to cause a
host crash (bsc#1127400).
- Fixed an issue which could allow malicious or buggy x86 PV guest kernels
to mount a Denial of Service attack affecting the whole system
- Fixed an issue which could allow an untrusted PV domain with access to a
physical device to DMA into its own pagetables leading to privilege
escalation (bsc#1126195).
- Fixed an issue which could allow a malicious or buggy x86 PV guest
kernels can mount a Denial of Service attack affecting the whole system

Other issues addressed:

- Upstream bug fixes (bsc#1027519)
- Fixed an issue where live migrations were failing when spectre was
enabled on xen boot cmdline (bsc#1116380).
- Fixed an issue where setup of grant_tables and other variables may fail
- Fixed a building issue (bsc#1119161).
- Fixed an issue where xpti=no-dom0 was not working as expected
- Packages should no longer use /var/adm/fillup-templates (bsc#1069468).
- Added Xen cmdline option "suse_vtsc_tolerance" to avoid TSC emulation
for HVM domUs (bsc#1026236).

This update was imported from the SUSE:SLE-12-SP3:Update update project.

Patch Instructions:

To install this openSUSE 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:

- openSUSE Leap 42.3:

zypper in -t patch openSUSE-2019-1226=1

Package List:

- openSUSE Leap 42.3 (i586 x86_64):


- openSUSE Leap 42.3 (x86_64):



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