Ubuntu 2104-1: LXC vulnerability

    Date12 Feb 2014
    CategoryUbuntu
    245
    Posted ByLinuxSecurity Advisories
    LXC would allow unintended access to the host, bypassing intended confinement.
    ==========================================================================
    Ubuntu Security Notice USN-2104-1
    February 12, 2014
    
    lxc vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 13.10
    
    Summary:
    
    LXC would allow unintended access to the host, bypassing intended
    confinement.
    
    Software Description:
    - lxc: Linux Containers userspace tools
    
    Details:
    
    Florian Sagar discovered that the LXC sshd template set incorrect mount
    permissions. An attacker could possibly use this flaw to cause privilege
    escalation on the host.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 13.10:
      lxc-templates                   1.0.0~alpha1-0ubuntu14.1
    
    After a standard system update you need to recreate LXC containers created
    with the sshd template to make all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-2104-1
      CVE-2013-6441
    
    Package Information:
      https://launchpad.net/ubuntu/+source/lxc/1.0.0~alpha1-0ubuntu14.1
    
    
    
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