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Gentoo Linux Security Advisory 201711-09

Gentoo Linux Security Advisory 201711-09
Posted Nov 13, 2017
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201711-9 - A vulnerability in LXC may lead to an unauthorized security bypass. Versions less than 2.0.7 are affected.

tags | advisory
systems | linux, gentoo
advisories | CVE-2016-10124
SHA-256 | ed3a5291fafca8e6edf35b3f06d5ab7aefc6d5c9618d7a7d2921ee767d1cb618

Gentoo Linux Security Advisory 201711-09

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Gentoo Linux Security Advisory GLSA 201711-09
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https://security.gentoo.org/
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Severity: Normal
Title: LXC: Remote security bypass
Date: November 11, 2017
Bugs: #636386
ID: 201711-09

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Synopsis
========

A vulnerability in LXC may lead to an unauthorized security bypass.

Background
==========

LinuX Containers userspace utilities

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-emulation/lxc < 2.0.7 >= 2.0.7

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

Previous versions of lxc-attach ran a shell or the specified command
without allocating a pseudo terminal making it vulnerable to input
faking via a TIOCSTI ioctl call.

Impact
======

Remote attackers can escape the container and perform unauthorized
modifications.

Workaround
==========

There is no know workaround at this time.

Resolution
==========

All LXC users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-emulation/lxc-2.0.7"

References
==========

[ 1 ] CVE-2016-10124
https://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-10124

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

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

https://security.gentoo.org/glsa/201711-09

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
=======
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