GLSA 201711-09: LXC: Remote security bypass

http://security.gentoo.org/

Severity:	normal
Title:	LXC: Remote security bypass
Date:	11/11/2017
Bugs:	#636386
ID:	201711-09

Synopsis

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

Background

LinuX Containers userspace utilities

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-emulation/lxc	< 2.0.7	>= 2.0.7	All supported architectures

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

CVE-2016-10124

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201711-09.xml

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.