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Gentoo Linux Security Advisory                           GLSA 201801-02
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: OptiPNG: Multiple vulnerabilities
     Date: January 07, 2018
     Bugs: #637936, #639690
       ID: 201801-02

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Synopsis
========

Multiple vulnerabilities have been found in OptiPNG, the worst of which
may allow execution of arbitrary code.

Background
==========

OptiPNG is a PNG optimizer that re-compresses image files to a smaller
size, without losing any information.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  media-gfx/optipng           < 0.7.6-r2               >= 0.7.6-r2 

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

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

Impact
======

A remote attacker could entice a user to process a specially crafted
image file, possibly resulting in execution of arbitrary code with the
privileges of the process or a Denial of Service condition.

Workaround
==========

There is no known workaround at this time. 

Resolution
==========

All OptiPNG users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=media-gfx/optipng-0.7.6-r2"

References
==========

[ 1 ] CVE-2017-1000229
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-1000229
[ 2 ] CVE-2017-16938
      https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-16938

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

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

 https://security.gentoo.org/glsa/201801-02

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.