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Gentoo Linux Security Advisory GLSA 201410-01
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http://security.gentoo.org/
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Severity: High
Title: Bash: Multiple vulnerabilities
Date: October 04, 2014
Bugs: #523742, #524256
ID: 201410-01

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Synopsis
========

Multiple parsing flaws in Bash could allow remote attackers to inject
code or cause a Denial of Service condition.

Background
==========

Bash is the standard GNU Bourne Again SHell.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-shells/bash < 4.2_p52 *>= 3.1_p22
*>= 3.2_p56
*>= 4.0_p43
*>= 4.1_p16
>= 4.2_p52

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

Florian Weimer, Todd Sabin, Michal Zalewski et al. discovered further
parsing flaws in Bash. The unaffected Gentoo packages listed in this
GLSA contain the official patches to fix the issues tracked as
CVE-2014-6277, CVE-2014-7186, and CVE-2014-7187. Furthermore, the
official patch known as "function prefix patch" is included which
prevents the exploitation of CVE-2014-6278.

Impact
======

A remote attacker could exploit these vulnerabilities to execute
arbitrary commands or cause a Denial of Service condition via various
vectors.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Bash 3.1 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-3.1_p22:3.1"

All Bash 3.2 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-3.2_p56:3.2"

All Bash 4.0 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-4.0_p43:4.0"

All Bash 4.1 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-4.1_p16:4.1"

All Bash 4.2 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-4.2_p52"

References
==========

[ 1 ] CVE-2014-6277
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-6277
[ 2 ] CVE-2014-6278
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-6278
[ 3 ] CVE-2014-7186
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-7186
[ 4 ] CVE-2014-7187
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-7187

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

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

http://security.gentoo.org/glsa/glsa-201410-01.xml

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 2014 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