Home / mailings [gentoo-announce] [ GLSA 201612-39 ] Bash: Arbitrary code execution
Posted on 13 December 2016
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From: Aaron Bauman <bman@gentoo.org>
To: gentoo-announce@lists.gentoo.org
Message-ID: <906424c8-924b-d30a-d715-220bf8dcb64b@gentoo.org>
Subject: [ GLSA 201612-39 ] Bash: Arbitrary code execution
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Gentoo Linux Security Advisory GLSA 201612-39
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https://security.gentoo.org/
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Severity: Normal
Title: Bash: Arbitrary code execution
Date: December 13, 2016
Bugs: #594496
ID: 201612-39
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Synopsis
========
A vulnerability in Bash could potentially lead to arbitrary code
execution.
Background
==========
Bash is the standard GNU Bourne Again SHell.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-shells/bash < 4.3_p46-r1 >= 4.3_p46-r1
Description
===========
A vulnerability was found in the way Bash expands $HOSTNAME. Injecting
malicious code into $HOSTNAME could cause it to run each time Bash
expands h in the prompt string.
Impact
======
A remote attacker controlling the system's hostname (i.e. via DHCP)
could possibly execute arbitrary code with the privileges of the
process, or cause a Denial of
Service condition.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Bash users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-4.3_p46-r1"
References
==========
[ 1 ] CVE-2016-0634
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-0634
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201612-39
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 2016 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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Gentoo Linux Security Advisory GLSA 201612-39
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<a class="moz-txt-link-freet=ext" href="https://security.gentoo.org/">https://security.gentoo.org/</=a>
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal
Title: Bash: Arbitrary code execution
Date: December 13, 2016
Bugs: #594496
ID: 201612-39
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
A vulnerability in Bash could potentially lead to arbitrary code
execution.
Background
==========
Bash is the standard GNU Bourne Again SHell.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-shells/bash < 4.3_p46-r1 >= 4.3_p4=6-r1
Description
===========
A vulnerability was found in the way Bash expands $HOSTNAME. Injecting
malicious code into $HOSTNAME could cause it to run each time Bash
expands h in the prompt string.
Impact
======
A remote attacker controlling the system's hostname (i.e. via DHCP)
could possibly execute arbitrary code with the privileges of the
process, or cause a Denial of
Service condition.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Bash users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-shells/bash-4.3_p46-r1"
References
==========
[ 1 ] CVE-2016-0634
<a class="moz-txt-link-freetext" href="http://nvd.nist.gov/nvd.=cfm?cvename=CVE-2016-0634">http://nvd.nist.gov/nvd.cfm?cvename=CVE-20=16-0634</a>
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
<a class="moz-txt-link-freetext" href="https://security.gentoo.org/g=lsa/201612-39">https://security.gentoo.org/glsa/201612-39</a>
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
<a class="moz-txt-link-abbreviated" href="mailto:security@gentoo.org"=>security@gentoo.org</a> or alternatively, you may file a bug at
<a class="moz-txt-link-freetext" href="https://bugs.gentoo.org">https=://bugs.gentoo.org</a>.
License
=======
Copyright 2016 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.
<a class="moz-txt-link-freetext" href="http://creativecommons.org/lic=enses/by-sa/2.5">http://creativecommons.org/licenses/by-sa/2.5</a></pre>
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