[SECURITY] [DLA 1132-1] xen security update

Package : xen
Version : 4.1.6.lts1-9
CVE ID : CVE-2017-10912 CVE-2017-10913 CVE-2017-10914 CVE-2017-10915
CVE-2017-10918 CVE-2017-10920 CVE-2017-10921 CVE-2017-10922
CVE-2017-12135 CVE-2017-12137 CVE-2017-12855 CVE-2017-14316
CVE-2017-14317 CVE-2017-14318 CVE-2017-14319

Multiple vulnerabilities have been discovered in the Xen hypervisor:

CVE-2017-10912

Jann Horn discovered that incorrectly handling of page transfers might
result in privilege escalation.

CVE-2017-10913 / CVE-2017-10914

Jann Horn discovered that race conditions in grant handling might
result in information leaks or privilege escalation.

CVE-2017-10915

Andrew Cooper discovered that incorrect reference counting with
shadow paging might result in privilege escalation.

CVE-2017-10918

Julien Grall discovered that incorrect error handling in
physical-to-machine memory mappings may result in privilege
escalation, denial of service or an information leak.

CVE-2017-10920 / CVE-2017-10921 / CVE-2017-10922

Jan Beulich discovered multiple places where reference
counting on grant table operations was incorrect, resulting
in potential privilege escalation

CVE-2017-12135

Jan Beulich found multiple problems in the handling of
transitive grants which could result in denial of service
and potentially privilege escalation.

CVE-2017-12137

Andrew Cooper discovered that incorrect validation of
grants may result in privilege escalation.

CVE-2017-12855

Jan Beulich discovered that incorrect grant status handling, thus
incorrectly informing the guest that the grant is no longer in use.

CVE-2017-14316

Matthew Daley discovered that the NUMA node parameter wasn't
verified which which may result in privilege escalation.

CVE-2017-14317

Eric Chanudet discovered that a race conditions in cxenstored might
result in information leaks or privilege escalation.

CVE-2017-14318

Matthew Daley discovered that incorrect validation of
grants may result in a denial of service.

CVE-2017-14319

Andrew Cooper discovered that insufficient grant unmapping
checks may result in denial of service and privilege escalation.

For Debian 7 "Wheezy", these problems have been fixed in version
4.1.6.lts1-9.

We recommend that you upgrade your xen packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS