Debian-LTS alert DLA-614-1 (xen)

From:
    	     
 
Bastian Blank <bastian.blank@credativ.de> 
To:
    	     
 
debian-lts-announce@lists.debian.org 
Subject:
    	     
 
[SECURITY] [DLA 614-1] xen security update 
Date:
    	     
 
Fri, 9 Sep 2016 10:20:05 +0200
Message-ID:
    	     
 
<20160909082003.GA11761@lacehammer.credativ.lan>
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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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