Ubuntu 2093-1: libvirt vulnerabilities

    Date30 Jan 2014
    CategoryUbuntu
    27
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in libvirt.
    ==========================================================================
    Ubuntu Security Notice USN-2093-1
    January 30, 2014
    
    libvirt vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 13.10
    - Ubuntu 12.10
    - Ubuntu 12.04 LTS
    
    Summary:
    
    Several security issues were fixed in libvirt.
    
    Software Description:
    - libvirt: Libvirt virtualization toolkit
    
    Details:
    
    Martin Kletzander discovered that libvirt incorrectly handled reading
    memory tunables from LXC guests. A local user could possibly use this flaw
    to cause libvirtd to crash, resulting in a denial of service. This issue
    only affected Ubuntu 13.10. (CVE-2013-6436)
    
    Dario Faggioli discovered that libvirt incorrectly handled the libxl
    driver. A local user could possibly use this flaw to cause libvirtd to
    crash, resulting in a denial of service, or possibly execute arbitrary
    code. This issue only affected Ubuntu 13.10. (CVE-2013-6457)
    
    It was discovered that libvirt contained multiple race conditions in block
    device handling. A remote read-only user could use this flaw to cause
    libvirtd to crash, resulting in a denial of service. (CVE-2013-6458)
    
    Eric Blake discovered that libvirt incorrectly handled certain ACLs. An
    attacker could use this flaw to possibly obtain certain sensitive
    information. This issue only affected Ubuntu 13.10. (CVE-2014-0028)
    
    Jiri Denemark discovered that libvirt incorrectly handled keepalives. A
    remote attacker could possibly use this flaw to cause libvirtd to crash,
    resulting in a denial of service. (CVE-2014-1447)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 13.10:
      libvirt-bin                     1.1.1-0ubuntu8.5
      libvirt0                        1.1.1-0ubuntu8.5
    
    Ubuntu 12.10:
      libvirt-bin                     0.9.13-0ubuntu12.6
      libvirt0                        0.9.13-0ubuntu12.6
    
    Ubuntu 12.04 LTS:
      libvirt-bin                     0.9.8-2ubuntu17.17
      libvirt0                        0.9.8-2ubuntu17.17
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-2093-1
      CVE-2013-6436, CVE-2013-6457, CVE-2013-6458, CVE-2014-0028,
      CVE-2014-1447
    
    Package Information:
      https://launchpad.net/ubuntu/+source/libvirt/1.1.1-0ubuntu8.5
      https://launchpad.net/ubuntu/+source/libvirt/0.9.13-0ubuntu12.6
      https://launchpad.net/ubuntu/+source/libvirt/0.9.8-2ubuntu17.17
    
    
    
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