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[security-announce] SUSE-SU-2017:2856-1: important: Security update for xen
SUSE Security Update: Security update for xen

Announcement ID: SUSE-SU-2017:2856-1
Rating: important
References: #1027519 #1059777 #1061076 #1061080 #1061081
#1061082 #1061084 #1061086 #1061087
Cross-References: CVE-2017-15588 CVE-2017-15589 CVE-2017-15590
CVE-2017-15592 CVE-2017-15593 CVE-2017-15594
CVE-2017-15595 CVE-2017-5526
Affected Products:
SUSE Linux Enterprise Server 12-LTSS

An update that solves 8 vulnerabilities and has one errata
is now available.


This update for xen fixes several issues:

These security issues were fixed:

- CVE-2017-5526: The ES1370 audio device emulation support was vulnerable
to a memory leakage issue allowing a privileged user inside the guest to
cause a DoS and/or potentially crash the Qemu process on the host
- CVE-2017-15593: Missing cleanup in the page type system allowed a
malicious or buggy PV guest to cause DoS (XSA-242 bsc#1061084)
- CVE-2017-15592: A problem in the shadow pagetable code allowed a
malicious or buggy HVM guest to cause DoS or cause hypervisor memory
corruption potentially allowing the guest to escalate its privilege
(XSA-243 bsc#1061086)
- CVE-2017-15594: Problematic handling of the selector fields in the
Interrupt Descriptor Table (IDT) allowed a malicious or buggy x86 PV
guest to escalate its privileges or cause DoS (XSA-244 bsc#1061087)
- CVE-2017-15589: Intercepted I/O write operations with less than a full
machine word's worth of data were not properly handled, which allowed a
malicious unprivileged x86 HVM guest to obtain sensitive information
from the host or
other guests (XSA-239 bsc#1061080)
- CVE-2017-15595: In certain configurations of linear page tables a stack
overflow might have occured that allowed a malicious or buggy PV guest
to cause DoS and potentially privilege escalation and information leaks
(XSA-240 bsc#1061081)
- CVE-2017-15588: Under certain conditions x86 PV guests could have caused
the hypervisor to miss a necessary TLB flush for a page. This allowed a
malicious x86 PV guest to access all of system memory, allowing for
privilege escalation, DoS, and information leaks (XSA-241 bsc#1061082)
- CVE-2017-15590: Multiple issues existed with the setup of PCI MSI
interrupts that allowed a malicious or buggy guest to cause DoS and
potentially privilege escalation and information leaks (XSA-237

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 12-LTSS:

zypper in -t patch SUSE-SLE-SERVER-12-2017-1778=1

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

Package List:

- SUSE Linux Enterprise Server 12-LTSS (x86_64):



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