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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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