Ubuntu 12.04 LTS: USN-1954-1 Moderate: Libvirt Denial of Service

ubuntu

September 18, 2013

Several security issues were fixed in libvirt.

Summary

Several security issues were fixed in libvirt.

Software Description:

- libvirt: Libvirt virtualization toolkit

Details:

It was discovered that libvirt used the pkcheck tool in an unsafe manner. A

local attacker could possibly use this flaw to bypass polkit

authentication. In Ubuntu, libvirt polkit authentication is not enabled by

default. (CVE-2013-4311)

It was discovered that libvirt incorrectly handled certain memory stats

requests. A remote attacker could use this issue to cause libvirt to

crash, resulting in a denial of service. This issue only affected Ubuntu

12.04 LTS, Ubuntu 12.10, and Ubuntu 13.04. (CVE-2013-4296)

It was discovered that libvirt incorrectly handled certain bitmap

operations. A remote attacker could use this issue to cause libvirt to

crash, resulting in a denial of service. This issue only affected Ubuntu

13.04. (CVE-2013-5651)

Topics Covered

security advisory denial of service Ubuntu update instructions libvirt

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 13.04:
  libvirt-bin                     1.0.2-0ubuntu11.13.04.4
  libvirt0                        1.0.2-0ubuntu11.13.04.4

Ubuntu 12.10:
  libvirt-bin                     0.9.13-0ubuntu12.5
  libvirt0                        0.9.13-0ubuntu12.5

Ubuntu 12.04 LTS:
  libvirt-bin                     0.9.8-2ubuntu17.13
  libvirt0                        0.9.8-2ubuntu17.13

Ubuntu 10.04 LTS:
  libvirt-bin                     0.7.5-5ubuntu27.24
  libvirt0                        0.7.5-5ubuntu27.24

After a standard system update you need to reboot your computer to make
all the necessary changes.