Gentoo Linux Security Advisory 201607-8 - A vulnerability has been found in Dropbear, which allows remote authenticated users to bypass intended shell-command restrictions. Versions less than 2016.73 are affected.
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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
=================
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Package / Vulnerable / Unaffected
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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