USN-2366-1: libvirt vulnerabilities

30 September 2014

libvirt vulnerabilities

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

  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in libvirt.

Software Description

  • libvirt - Libvirt virtualization toolkit

Details

Daniel P. Berrange and Richard Jones discovered that libvirt incorrectly handled XML documents containing XML external entity declarations. An attacker could use this issue to cause libvirtd to crash, resulting in a denial of service on all affected releases, or possibly read arbitrary files if fine grained access control was enabled on Ubuntu 14.04 LTS. (CVE-2014-0179, CVE-2014-5177)

Luyao Huang discovered that libvirt incorrectly handled certain blkiotune queries. An attacker could use this issue to cause libvirtd to crash, resulting in a denial of service. This issue only applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-3633)

Update instructions

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

Ubuntu 14.04 LTS
libvirt-bin - 1.2.2-0ubuntu13.1.5
libvirt0 - 1.2.2-0ubuntu13.1.5
Ubuntu 12.04 LTS
libvirt-bin - 0.9.8-2ubuntu17.20
libvirt0 - 0.9.8-2ubuntu17.20
Ubuntu 10.04 LTS
libvirt-bin - 0.7.5-5ubuntu27.25
libvirt0 - 0.7.5-5ubuntu27.25

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