[SECURITY] [DLA 614-1] xen security update
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Package : xen
Version : 4.1.6.lts1-2
CVE ID : CVE-2016-7092 CVE-2016-7094
Multiple vulnerabilities have been discovered in the Xen hypervisor. The
Common Vulnerabilities and Exposures project identifies the following
problems:
CVE-2016-7092 (XSA-185)
Jeremie Boutoille of Quarkslab and Shangcong Luan of Alibaba
discovered a flaw in the handling of L3 pagetable entries, allowing
a malicious 32-bit PV guest administrator can escalate their
privilege to that of the host.
CVE-2016-7094 (XSA-187)
x86 HVM guests running with shadow paging use a subset of the x86
emulator to handle the guest writing to its own pagetables. Andrew
Cooper of Citrix discovered that there are situations a guest can
provoke which result in exceeding the space allocated for internal
state. A malicious HVM guest administrator can cause Xen to fail a
bug check, causing a denial of service to the host.
For Debian 7 "Wheezy", these problems have been fixed in version
4.1.6.lts1-2. For Debian 8 "Jessie", these problems have been fixed in
version 4.4.1-9+deb8u7.
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
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