[USN-1954-1] libvirt vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-1954-1
September 18, 2013

libvirt vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 13.04
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

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)

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.

References:
http://www.ubuntu.com/usn/usn-1954-1
CVE-2013-4296, CVE-2013-4311, CVE-2013-5651

Package Information:
https://launchpad.net/ubuntu/+source/libvirt/1.0.2-0ubuntu11.13.04.4
https://launchpad.net/ubuntu/+source/libvirt/0.9.13-0ubuntu12.5
https://launchpad.net/ubuntu/+source/libvirt/0.9.8-2ubuntu17.13
https://launchpad.net/ubuntu/+source/libvirt/0.7.5-5ubuntu27.24