Sicherheit: Mangelnde Rechteprüfung in Dropbear SSH

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From: Aaron Bauman <bman@gentoo.org>
To: gentoo-announce@lists.gentoo.org
Message-ID: <8be798dc-a3e9-6203-61d7-508f33730497@gentoo.org>
Subject: [ GLSA 201607-08 ] Dropbear: Privilege escalation

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Gentoo Linux Security Advisory GLSA 201607-08
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https://security.gentoo.org/
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Severity: Normal
Title: Dropbear: Privilege escalation
Date: July 20, 2016
Bugs: #577050
ID: 201607-08

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Synopsis
========

A vulnerability has been found in Dropbear, which allows remote
authenticated users to bypass intended shell-command restrictions.

Background
==========

Dropbear is a relatively small SSH server and client.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/dropbear < 2016.73 >= 2016.73

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

A CRLF injection vulnerability in Dropbear SSH allows remote
authenticated users to bypass intended shell-command restrictions via
crafted X11 forwarding data.

Impact
======

A remote authenticated user could execute arbitrary code with the
privileges of the process.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Dropbear users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/dropbear-2016.73"

References
==========

[ 1 ] CVE-2016-3116
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-3116

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

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

https://security.gentoo.org/glsa/201607-08

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 201607-08
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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: Dropbear: Privilege escalation
Date: July 20, 2016
Bugs: #577050
ID: 201607-08

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

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

A vulnerability has been found in Dropbear, which allows remote
authenticated users to bypass intended shell-command restrictions.

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

Dropbear is a relatively small SSH server and client.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/dropbear < 2016.73 >=3D
201=
6.73=20

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

A CRLF injection vulnerability in Dropbear SSH allows remote
authenticated users to bypass intended shell-command restrictions via
crafted X11 forwarding data.

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

A remote authenticated user could execute arbitrary code with the
privileges of the process.

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 Dropbear users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose
">=3Dnet-misc/dropbear-2016.73"

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

[ 1 ] CVE-2016-3116
<a class=3D"moz-txt-link-freetext" href=3D"http://nvd.nist.gov/nvd.=
cfm?cvename=3DCVE-2016-3116">http://nvd.nist.gov/nvd.cfm?cvename=3DCVE-20=
16-3116</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/201607-08">https://security.gentoo.org/glsa/201607-08</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>
</body>
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