- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 201409-10
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            https://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

 Severity: High
    Title: Bash: Code Injection (Updated fix for GLSA 201409-09)
     Date: September 25, 2014
     Bugs: #523592
       ID: 201409-10

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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:

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

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.

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