N/A - USN-3136-1

Executive Summary

Summary
Title	LXC vulnerability

Informations
Name	USN-3136-1	First vendor Publication	2016-11-23
Vendor	Ubuntu	Last vendor Modification	2016-11-23
Severity (Vendor)	N/A	Revision	N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score	NA
Base Score	NA	Environmental Score	NA
impact SubScore	NA	Temporal Score	NA
Exploitabality Sub Score	NA

Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score	N/A	Attack Range	N/A
Cvss Impact Score	N/A	Attack Complexity	N/A
Cvss Expoit Score	N/A	Authentication	N/A
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.10 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS

Summary:

LXC could be made to allow containers to access to the host filesystem.

Software Description: - lxc: Linux Containers userspace tools

Details:

Roman Fiedler discovered a directory traversal flaw in lxc-attach. An attacker with access to an LXC container could exploit this flaw to access files outside of the container.

Update instructions:

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

Ubuntu 16.10:
liblxc1 2.0.5-0ubuntu1.2
lxc1 2.0.5-0ubuntu1.2

Ubuntu 16.04 LTS:
liblxc1 2.0.5-0ubuntu1~ubuntu16.04.3
lxc1 2.0.5-0ubuntu1~ubuntu16.04.3

Ubuntu 14.04 LTS:
liblxc1 1.0.8-0ubuntu0.4
lxc 1.0.8-0ubuntu0.4

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

References:
http://www.ubuntu.com/usn/usn-3136-1
CVE-2016-8649

Package Information:
https://launchpad.net/ubuntu/+source/lxc/2.0.5-0ubuntu1.2
https://launchpad.net/ubuntu/+source/lxc/2.0.5-0ubuntu1~ubuntu16.04.3
https://launchpad.net/ubuntu/+source/lxc/1.0.8-0ubuntu0.4