============================================================================ 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