Several security issues were fixed in libvirt.
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)
30 January 2014
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in libvirt.
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)
The problem can be corrected by updating your system to the following package versions:
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.
Vulmon