USN-1954-1: libvirt vulnerabilities

18 September 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

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.

References