[ glsa 201711-09 ] lxc

[GLSA]

Gentoo Linux Security Advisory

Title: LXC: Remote security bypass (GLSA 201711-09)
Severity: normal
Exploitable: remote
Date: 2017-11-11
Bug(s): #636386
ID: 201711-09

Synopsis

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

Background

LinuX Containers userspace utilities

Affected Packages

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