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Gentoo Linux Security Advisory                           GLSA 201705-11
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Xen: Multiple vulnerabilities
     Date: May 26, 2017
     Bugs: #615980
       ID: 201705-11

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Synopsis
=======
Multiple vulnerabilities have been found in Xen, the worst of which
could allow for privilege escalation.

Background
=========
Xen is a bare-metal hypervisor.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-emulation/xen           < 4.7.2-r1               >= 4.7.2-r1
  2  app-emulation/xen-tools      < 4.7.2                    >= 4.7.2
  3  app-emulation/xen-pvgrub
                                  < 4.7.2                    >= 4.7.2
    -------------------------------------------------------------------
     3 affected packages

Description
==========
Multiple vulnerabilities have been discovered in Xen. Please review the
CVE identifiers and Xen Security Advisory referenced below for details.

Impact
=====
A local attacker could potentially execute arbitrary code with
privileges of Xen (QEMU) process on the host, gain privileges on the
host system, or cause a Denial of Service condition.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All Xen users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-emulation/xen-4.7.2-r1:0"

All Xen Tools users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot -v ">=app-emulation/xen-tools-4.7.2:0"

All Xen pvgrub users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot -v ">=app-emulation/xen-pvgrub-4.7.2:0"

References
=========
[ 1 ] CVE-2017-8903
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-8903
[ 2 ] CVE-2017-8904
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-8904
[ 3 ] CVE-2017-8905
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-8905

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/201705-11

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
======
Copyright 2017 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5