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Gentoo Linux Security Advisory GLSA 201409-10
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http://security.gentoo.org/
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Severity: High
Title: Bash: Code Injection (Updated fix for GLSA 201409-09)
Date: September 25, 2014
Bugs: #523592
ID: 201409-10

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Synopsis
========

A parsing flaw related to functions and environments in Bash could
allow attackers to inject code. The unaffected packages listed in GLSA
201409-09 had an incomplete fix.

Background
==========

Bash is the standard GNU Bourne Again SHell.

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

——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 app-shells/bash < 4.2_p48-r1 *>= 3.1_p18-r1
*>= 3.2_p52-r1
*>= 4.0_p39-r1
*>= 4.1_p12-r1
>= 4.2_p48-r1

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

Stephane Chazelas reported that Bash incorrectly handles function
definitions, allowing attackers to inject arbitrary code
(CVE-2014-6271). Gentoo Linux informed about this issue in GLSA
201409-09.

Tavis Ormandy reported that the patch for CVE-2014-6271 was incomplete.
As such, this GLSA supersedes GLSA 201409-09.

Impact
======

A remote attacker could exploit this vulnerability to execute arbitrary
commands even in restricted environments.

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_p18-r1”

All Bash 3.2 users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=app-shells/bash-3.2_p52-r1”

All Bash 4.0 users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=app-shells/bash-4.0_p39-r1”

All Bash 4.1 users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=app-shells/bash-4.1_p12-r1”

All Bash 4.2 users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=app-shells/bash-4.2_p48-r1”

References
==========

[ 1 ] CVE-2014-7169
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-7169

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

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

http://security.gentoo.org/glsa/glsa-201409-10.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

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