USN-1954-1: libvirt vulnerabilities

Releases

• Ubuntu 13.04
• Ubuntu 12.10
• Ubuntu 12.04
• Ubuntu 10.04

Packages

• 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

• libvirt0 - 1.0.2-0ubuntu11.13.04.4
• libvirt-bin - 1.0.2-0ubuntu11.13.04.4

Ubuntu 12.10

• libvirt0 - 0.9.13-0ubuntu12.5
• libvirt-bin - 0.9.13-0ubuntu12.5

Ubuntu 12.04

• libvirt0 - 0.9.8-2ubuntu17.13
• libvirt-bin - 0.9.8-2ubuntu17.13

Ubuntu 10.04

• libvirt0 - 0.7.5-5ubuntu27.24
• libvirt-bin - 0.7.5-5ubuntu27.24

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

References

• CVE-2013-4296
• CVE-2013-4311
• CVE-2013-5651