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Gentoo Linux Security Advisory                           GLSA 201701-56
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: zlib: Multiple vulnerabilities
     Date: January 23, 2017
     Bugs: #601828
       ID: 201701-56

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Synopsis
=======
Multiple vulnerabilities have been found in zlib, the worst of which
could allow attackers to cause a Denial of Service condition.

Background
=========
zlib is a widely used free and patent unencumbered data compression
library.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  sys-libs/zlib                < 1.2.9                    >= 1.2.9

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

Impact
=====
An attacker could cause a Denial of Service condition.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All zlib users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-libs/zlib-1.2.9"

References
=========
[ 1 ] CVE-2016-9840
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-9840
[ 2 ] CVE-2016-9841
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-9841
[ 3 ] CVE-2016-9842
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-9842
[ 4 ] CVE-2016-9843
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-9843

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

 https://security.gentoo.org/glsa/201701-56

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.

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