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Gentoo Linux Security Advisory                           GLSA 201711-01
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: libxml2: Multiple vulnerabilities
     Date: November 10, 2017
     Bugs: #599192, #605208, #618604, #622914, #623206
       ID: 201711-01

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Synopsis
========

Multiple vulnerabilities have been found in libxml2, the worst of which
could result in the execution of arbitrary code.

Background
==========

libxml2 is the XML (eXtended Markup Language) C parser and toolkit
initially developed for the Gnome project.

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

    ——————————————————————-
     Package              /     Vulnerable     /            Unaffected
    ——————————————————————-
  1  dev-libs/libxml2            < 2.9.4-r3               >= 2.9.4-r3 

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

Multiple vulnerabilities have been discovered in libxml2. Please review
the CVE identifiers referenced below for details.

Impact
======

A remote attacker, by enticing a user to process a specially crafted
XML document, could remotely execute arbitrary code, conduct XML
External Entity (XXE) attacks, or cause a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libxml2 users should upgrade to the latest version:

  # emerge –sync
  # emerge –ask –oneshot –verbose “>=dev-libs/libxml2-2.9.4-r3”

Packages which depend on this library may need to be recompiled. Tools
such as revdep-rebuild may assist in identifying some of these
packages.

References
==========

[ 1 ] CVE-2016-9318
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-9318
[ 2 ] CVE-2017-0663
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-0663
[ 3 ] CVE-2017-5969
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-5969
[ 4 ] CVE-2017-7375
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-7375
[ 5 ] CVE-2017-9047
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-9047
[ 6 ] CVE-2017-9048
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-9048
[ 7 ] CVE-2017-9049
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-9049
[ 8 ] CVE-2017-9050
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-9050

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

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

 https://security.gentoo.org/glsa/201711-01

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.

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