USN-2813-1: LXCFS vulnerabilities

17 November 2015

lxcfs vulnerabilities

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

  • Ubuntu 15.10
  • Ubuntu 15.04

Summary

Several security issues were fixed in LXCFS.

Software Description

  • lxcfs - FUSE based filesystem for LXC

Details

It was discovered that LXCFS incorrectly enforced directory escapes. A local attacker could use this issue to possibly escalate privileges. (CVE-2015-1342)

It was discovered that LXCFS incorrectly checked certain permissions. A local attacker could use this issue t possibly escalate privileges. (CVE-2015-1344)

Update instructions

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

Ubuntu 15.10
lxcfs - 0.10-0ubuntu2.1
Ubuntu 15.04
lxcfs - 0.7-0ubuntu4.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make all the necessary changes.

References