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Ubuntu 14.04 LTS USN-2753-3: Fix For LXC Regression Issue

ubuntu
Calendar Grey October 5, 2015
Scroller Ubuntu
=========================================================================Ubuntu Security Notice USN-
USN-2753-1 introduced a regression in LXC.

Summary

USN-2753-1 introduced a regression in LXC.

Software Description:

- lxc: Linux Containers userspace tools

Details:

USN-2753-1 fixed a vulnerability in LXC. The update caused a regression

that prevented some containers from starting. This regression only

affected containers that had a path that contained a '/./' directory

specified as a bind mount target in their configuration file. This

update fixes the problem. We apologize for the inconvenience.

Original advisory details:

Roman Fiedler discovered a directory traversal flaw in lxc-start. A local

attacker with access to an LXC container could exploit this flaw to run

programs inside the container that are not confined by AppArmor or expose

unintended files in the host to the container.

Topics%20covered

Topics Covered

security advisory update directory traversal ubuntu regression lxc

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS:
  liblxc1                         1.0.7-0ubuntu0.7
  lxc                             1.0.7-0ubuntu0.7
  lxc-dev                         1.0.7-0ubuntu0.7
  lxc-templates                   1.0.7-0ubuntu0.7
  lxc-tests                       1.0.7-0ubuntu0.7
  python3-lxc                     1.0.7-0ubuntu0.7

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-2753-3

https://ubuntu.com/security/notices/USN-2753-1

https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1501491

Severity
critical
Lowest
Low
Medium
High
Critical

October 05, 2015

Topics%20covered

Topics Covered

security advisory update directory traversal ubuntu regression lxc

Package Information

https://launchpad.net/ubuntu/+source/lxc/1.0.7-0ubuntu0.7

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