Sicherheit: Ausführen von Code mit höheren Privilegien in runC

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From: Aaron Bauman <bman@gentoo.org>
To: gentoo-announce@lists.gentoo.org
Message-ID: <4a0237c7-d76e-14ac-51e6-a2945b440ce6@gentoo.org>
Subject: [ GLSA 201701-34 ] runC: Privilege escalation

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Gentoo Linux Security Advisory GLSA 201701-34
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https://security.gentoo.org/
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Severity: Normal
Title: runC: Privilege escalation
Date: January 12, 2017
Bugs: #605378
ID: 201701-34

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Synopsis
========

A vulnerability in runC could lead to privilege escalation.

Background
==========

RunC is a CLI tool for spawning and running containers according to the
OCI specification.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-emulation/runc < 1.0.0_rc2-r2 >= 1.0.0_rc2-r2

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

A vulnerability was discovered in runC that allows additional container
processes via 'runc exec' to be ptraced by the pid 1 of the container.
This allows the main processes of the container, if running as root, to
gain access to file-descriptors of these new processes.

Impact
======

An attacker, who is able to successfully escape the container or modify
runC's state before process initialization, could escalate privileges.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All runC users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot -v ">=app-emulation/runc-1.0.0_rc2-r2"

References
==========

[ 1 ] CVE-2016-9962
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-9962

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

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

https://security.gentoo.org/glsa/201701-34

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 2017 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 201701-34
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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: runC: Privilege escalation
Date: January 12, 2017
Bugs: #605378
ID: 201701-34

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

A vulnerability in runC could lead to privilege escalation.

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

RunC is a CLI tool for spawning and running containers according to the
OCI specification.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-emulation/runc < 1.0.0_rc2-r2 >=3D
1.0.0_rc=
2-r2=20

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

A vulnerability was discovered in runC that allows additional container
processes via 'runc exec' to be ptraced by the pid 1 of the
container.=20
This allows the main processes of the container, if running as root, to
gain access to file-descriptors of these new processes.

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

An attacker, who is able to successfully escape the container or modify
runC's state before process initialization, could escalate privileges.

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 runC users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot -v
">=3Dapp-emulation/runc-1.0.0_rc2-r2"

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

[ 1 ] CVE-2016-9962
<a class=3D"moz-txt-link-freetext" href=3D"http://nvd.nist.gov/nvd.=
cfm?cvename=3DCVE-2016-9962">http://nvd.nist.gov/nvd.cfm?cvename=3DCVE-20=
16-9962</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/201701-34">https://security.gentoo.org/glsa/201701-34</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 2017 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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