Sicherheit: Ausführen beliebiger Kommandos in util-linux

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From: Aaron Bauman <bman@gentoo.org>
To: gentoo-announce@lists.gentoo.org
Message-ID: <1897bc68-47da-1fbb-2632-f581e3f58055@gentoo.org>
Subject: [ GLSA 201612-14 ] util-linux: Arbitrary code execution

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Gentoo Linux Security Advisory GLSA 201612-14
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https://security.gentoo.org/
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Severity: Normal
Title: util-linux: Arbitrary code execution
Date: December 06, 2016
Bugs: #530844
ID: 201612-14

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Synopsis
========

A vulnerability was discovered in util-linux, which could potentially
lead to the execution of arbitrary code.

Background
==========

util-linux is a suite of Linux programs including mount and umount,
programs used to mount and unmount filesystems.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 sys-apps/util-linux < 2.26 >= 2.26

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

A command injection flaw was discovered in util-linux's "blkid"
utility. It uses caching files (/dev/.blkid.tab or
/run/blkid/blkid.tab) to store info about the UUID, LABEL etc. it finds
on certain devices. However, it does not strip '"' character, so it
can
be confused to build variable names containing shell metacharacters,
which it would usually encode inside the value.

Impact
======

A local attacker could create a specially crafted partition label
containing arbitrary code which would get executed when the "blkid"
utility processes that value.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All util-linux users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/util-linux-2.26"

References
==========

[ 1 ] CVE-2014-9114
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-9114

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

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

https://security.gentoo.org/glsa/201612-14

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 201612-14
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<a
class=3D"moz-txt-link-freet=
ext" href=3D"https://security.gentoo.org/">https://security.gentoo.org/</=
a>
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Severity: Normal
Title: util-linux: Arbitrary code execution
Date: December 06, 2016
Bugs: #530844
ID: 201612-14

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

Synopsis
=3D=3D=3D=3D=3D=3D=3D=3D

A vulnerability was discovered in util-linux, which could potentially
lead to the execution of arbitrary code.

Background
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

util-linux is a suite of Linux programs including mount and umount,
programs used to mount and unmount filesystems.

Affected packages
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 sys-apps/util-linux < 2.26
>=3D =
2.26=20

Description
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

A command injection flaw was discovered in util-linux's "blkid"
utility. It uses caching files (/dev/.blkid.tab or
/run/blkid/blkid.tab) to store info about the UUID, LABEL etc. it finds
on certain devices. However, it does not strip '"' character, so it
can
be confused to build variable names containing shell metacharacters,
which it would usually encode inside the value.

Impact
=3D=3D=3D=3D=3D=3D

A local attacker could create a specially crafted partition label
containing arbitrary code which would get executed when the "blkid"
utility processes that value.

Workaround
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

There is no known workaround at this time.

Resolution
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

All util-linux users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose
">=3Dsys-apps/util-linux-2.26"

References
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

[ 1 ] CVE-2014-9114
<a class=3D"moz-txt-link-freetext" href=3D"http://nvd.nist.gov/nvd.=
cfm?cvename=3DCVE-2014-9114">http://nvd.nist.gov/nvd.cfm?cvename=3DCVE-20=
14-9114</a>

Availability
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

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

<a class=3D"moz-txt-link-freetext" href=3D"https://security.gentoo.org/g=
lsa/201612-14">https://security.gentoo.org/glsa/201612-14</a>

Concerns?
=3D=3D=3D=3D=3D=3D=3D=3D=3D

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=3D"moz-txt-link-abbreviated"
href=3D"mailto:security@gentoo.org"=
>security@gentoo.org</a> or alternatively, you may file a bug at
<a class=3D"moz-txt-link-freetext" href=3D"https://bugs.gentoo.org">https=
://bugs.gentoo.org</a>.

License
=3D=3D=3D=3D=3D=3D=3D

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=3D"moz-txt-link-freetext" href=3D"http://creativecommons.org/lic=
enses/by-sa/2.5">http://creativecommons.org/licenses/by-sa/2.5</a></pre>
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