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[gentoo-announce] [ GLSA 201711-11 ] VDE: Privilege escalation

Posted on 12 November 2017
Gentoo-announce

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Gentoo Linux Security Advisory=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2==A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0==C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0GLSA 201711-11
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=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2==A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0==C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2==A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0https://security.gentoo.org/
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=C2=A0Severity: Normal
=C2=A0=C2=A0=C2=A0=C2=A0Title: VDE: Privilege escalation
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Date: November 12, 2017
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Bugs: #603382
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0ID: 201711-11

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Synopsis
========
A vulnerability was discovered in VDE which may allow local users to
gain root privileges.

Background
==========
VDE is an ethernet compliant virtual network that can be spawned over a
set of physical computer over the Internet.

Affected packages
=================
=C2=A0=C2=A0=C2=A0=C2=A0---------------------------------------------------=----------------
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Package=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0==C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0/=C2=A0=C2=A0=C2=A0=C2=A0==C2=A0Vulnerable=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0/=C2=A0=C2=A0=C2=A0=C2=A0=C2==A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Unaffected
=C2=A0=C2=A0=C2=A0=C2=A0---------------------------------------------------=----------------
=C2=A0 1=C2=A0=C2=A0net-misc/vde=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0==C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0< 2.3.2-r4=C2=A0=C2==A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0==C2=A0>= 2.3.2-r4=C2=A0

Description
===========
It was discovered that Gentoo=E2=80=99s default VDE installation suffered f=rom
a privilege escalation vulnerability in the init script. This script
calls an unsafe 'chown' command which gives members from "qemu" group
root privileges.

Impact
======
A local attacker could escalate privileges to root.

Workaround
==========
There is no known workaround at this time.

Resolution
==========
All VDE users should upgrade to the latest version:

=C2=A0 # emerge --sync
=C2=A0 # emerge --ask --oneshot --verbose ">=net-misc/vde-2.3.2-r4"

References
==========
[ 1 ] CVE-2017-16638
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0https://nvd.nist.gov/nvd.cfm?cvename==CVE-2017-16638

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

=C2=A0https://security.gentoo.org/glsa/201711-11

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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