[ GLSA 202007-38 ] QtGui: Arbitrary code execution

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Gentoo Linux Security Advisory                           GLSA 202007-38
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: QtGui: Arbitrary code execution
     Date: July 27, 2020
     Bugs: #719732
       ID: 202007-38

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Synopsis
========

A use-after-free was discovered in QtGui's Markdown handling code
possibly allowing a remote attacker to execute arbitrary code.

Background
==========

QtGui is a module for the Qt toolkit.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  dev-qt/qtgui                 < 5.14.2                  >= 5.14.2

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

QtGui's setMarkdown has a use-after-free related to
QTextMarkdownImporter::insertBlock.

Impact
======

A remote attacker could possibly execute arbitrary code with the
privileges of the process, or cause a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All QtGui users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-qt/qtgui-5.14.2"

Note that the Qt suite is best kept in sync, so a world upgrade may be
advisable to keep your system in a good state.

References
==========

[ 1 ] CVE-2020-12267
      https://nvd.nist.gov/vuln/detail/CVE-2020-12267

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

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

 https://security.gentoo.org/glsa/202007-38

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
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2020 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

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