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Gentoo Linux Security Advisory                           GLSA 202107-30
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                                           https://security.gentoo.org/
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 Severity: High
    Title: Xen: Multiple vulnerabilities
     Date: July 12, 2021
     Bugs: #760144, #766474, #783456, #795054
       ID: 202107-30

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Synopsis
========

Multiple vulnerabilities have been found in Xen, the worst of which
could result in privilege escalation.

Background
==========

Xen is a bare-metal hypervisor.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-emulation/xen          < 4.15.0-r1              >= 4.14.2-r1
                                                         >= 4.15.0-r1

Description
===========

Multiple vulnerabilities have been discovered in Xen. Please review the
CVE identifiers referenced below for details.

Impact
======

Please review the referenced CVE identifiers for details.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Xen 4.14.x users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-emulation/xen-4.14.2-r1"

All Xen 4.15.x users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-emulation/xen-4.15.0-r1"

References
==========

[  1 ] CVE-2020-29479
       https://nvd.nist.gov/vuln/detail/CVE-2020-29479
[  2 ] CVE-2020-29486
       https://nvd.nist.gov/vuln/detail/CVE-2020-29486
[  3 ] CVE-2020-29487
       https://nvd.nist.gov/vuln/detail/CVE-2020-29487
[  4 ] CVE-2020-29566
       https://nvd.nist.gov/vuln/detail/CVE-2020-29566
[  5 ] CVE-2020-29567
       https://nvd.nist.gov/vuln/detail/CVE-2020-29567
[  6 ] CVE-2020-29568
       https://nvd.nist.gov/vuln/detail/CVE-2020-29568
[  7 ] CVE-2020-29569
       https://nvd.nist.gov/vuln/detail/CVE-2020-29569
[  8 ] CVE-2020-29570
       https://nvd.nist.gov/vuln/detail/CVE-2020-29570
[  9 ] CVE-2020-29571
       https://nvd.nist.gov/vuln/detail/CVE-2020-29571
[ 10 ] CVE-2021-0089
       https://nvd.nist.gov/vuln/detail/CVE-2021-0089
[ 11 ] CVE-2021-26313
       https://nvd.nist.gov/vuln/detail/CVE-2021-26313
[ 12 ] CVE-2021-28687
       https://nvd.nist.gov/vuln/detail/CVE-2021-28687
[ 13 ] CVE-2021-28690
       https://nvd.nist.gov/vuln/detail/CVE-2021-28690
[ 14 ] CVE-2021-28691
       https://nvd.nist.gov/vuln/detail/CVE-2021-28691
[ 15 ] CVE-2021-28692
       https://nvd.nist.gov/vuln/detail/CVE-2021-28692
[ 16 ] CVE-2021-28693
       https://nvd.nist.gov/vuln/detail/CVE-2021-28693
[ 17 ] CVE-2021-3308
       https://nvd.nist.gov/vuln/detail/CVE-2021-3308

Availability
============

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

 https://security.gentoo.org/glsa/202107-30

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 2021 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.

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