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Gentoo Linux Security Advisory                           GLSA 202107-05
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                                           https://security.gentoo.org/
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 Severity: Low
    Title: libxml2: Multiple vulnerabilities
     Date: July 06, 2021
     Bugs: #749849, #790002
       ID: 202107-05

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Synopsis
========

Multiple vulnerabilities have been found in libxml2, the worst of which
could result in a Denial of Service condition.

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             < 2.9.11                  >= 2.9.11 

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

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

Impact
======

A remote attacker could entice a user to process a specially crafted
XML document using an application linked against libxml2, possibly
resulting in a Denial of Service condition or obtaining sensitive
information.

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/libxml2-2.9.12-r3"

References
==========

[ 1 ] CVE-2020-24977
      https://nvd.nist.gov/vuln/detail/CVE-2020-24977
[ 2 ] CVE-2021-3516
      https://nvd.nist.gov/vuln/detail/CVE-2021-3516
[ 3 ] CVE-2021-3517
      https://nvd.nist.gov/vuln/detail/CVE-2021-3517
[ 4 ] CVE-2021-3518
      https://nvd.nist.gov/vuln/detail/CVE-2021-3518
[ 5 ] CVE-2021-3537
      https://nvd.nist.gov/vuln/detail/CVE-2021-3537
[ 6 ] CVE-2021-3541
      https://nvd.nist.gov/vuln/detail/CVE-2021-3541

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

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

 https://security.gentoo.org/glsa/202107-05

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