Updated xen packages fix security vulnerability

This xen update is based on upstream 4.5.5 maintenance release, and fixes the following security issues: The qemu implementation in libvirt before 1.3.0 and Xen allows local guest OS users to cause a denial of service host disk consumption by writing to stdout or stderr CVE-2014-3672 The xrstor...

CVE-2016-7092: Undefined Security Weakness

The getpagefroml3e function in arch/x86/mm.c in Xen allows local 32-bit PV guest OS administrators to gain host OS privileges via vectors related to L3 recursive pagetables...

Design/Logic Flaw

Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention SMAP whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service hypervisor and VM crash by triggering a safety check...

CVE-2016-6258: Improper Access Control

The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries...

CVE-2016-6259: Improper Input Validation

Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention SMAP whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service hypervisor and VM crash by triggering a safety check...

PT-2016-6810

Name of the Vulnerable Software and Affected Versions Xen versions 4.5.x through 4.7.x Description The issue allows local 32-bit PV guest OS kernels to cause a denial of service, resulting in a hypervisor and VM crash, by triggering a safety check due to the lack of Supervisor Mode Access...