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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

=================

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Package / Vulnerable / Unaffected

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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

=======

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