Ubuntu 3909-1: libvirt vulnerability

    Date14 Mar 2019
    CategoryUbuntu
    2987
    Posted ByLinuxSecurity Advisories
    libvirt could be made to crash under certain conditions.
    ==========================================================================
    Ubuntu Security Notice USN-3909-1
    March 14, 2019
    
    libvirt vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.10
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    libvirt could be made to crash under certain conditions.
    
    Software Description:
    - libvirt: Libvirt virtualization toolkit
    
    Details:
    
    It was discovered that libvirt incorrectly handled waiting for certain
    agent events. An attacker inside a guest could possibly use this issue to
    cause libvirtd to stop responding, resulting in a denial of service.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.10:
      libvirt-clients                 4.6.0-2ubuntu3.4
      libvirt-daemon                  4.6.0-2ubuntu3.4
      libvirt0                        4.6.0-2ubuntu3.4
    
    Ubuntu 18.04 LTS:
      libvirt-clients                 4.0.0-1ubuntu8.8
      libvirt-daemon                  4.0.0-1ubuntu8.8
      libvirt0                        4.0.0-1ubuntu8.8
    
    Ubuntu 16.04 LTS:
      libvirt-bin                     1.3.1-1ubuntu10.25
      libvirt0                        1.3.1-1ubuntu10.25
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3909-1
      CVE-2019-3840
    
    Package Information:
      https://launchpad.net/ubuntu/+source/libvirt/4.6.0-2ubuntu3.4
      https://launchpad.net/ubuntu/+source/libvirt/4.0.0-1ubuntu8.8
      https://launchpad.net/ubuntu/+source/libvirt/1.3.1-1ubuntu10.25
    
    
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