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From: Thomas Deutschmann <whissi@gentoo.org>
Reply-To: security@gentoo.org
To: gentoo-announce@lists.gentoo.org
Message-ID: <8f2a9981-9ba0-60fd-bda1-a249216679af@gentoo.org>
Subject: [ GLSA 201708-08 ] bzip2: Denial of Service

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Gentoo Linux Security Advisory                           GLSA 201708-08
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: bzip2: Denial of Service
     Date: August 21, 2017
     Bugs: #620466
       ID: 201708-08

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Synopsis
========

An use-after-free vulnerability has been found in bzip2 that could
allow remote attackers to cause a Denial of Service condition.

Background
==========

bzip2 is a high-quality data compressor used extensively by Gentoo
Linux.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-arch/bzip2             < 1.0.6-r8:              >= 1.0.6-r8:

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

A use-after-free flaw was found in bzip2recover, leading to a null
pointer dereference, or a write to a closed file descriptor. Please
review the CVE identifier referenced below for details.

Impact
======

A remote attacker could entice a user to process a specially crafted
bzip2 archive using bzip2recover, possibly resulting in a Denial of
Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All bzip2 users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-arch/bzip2-1.0.6-r8"

References
==========

[ 1 ] CVE-2016-3189
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-3189

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

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

 https://security.gentoo.org/glsa/201708-08

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.

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


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