1. Ubuntu Security Notices
  2. USN-1954-1

USN-1954-1: libvirt vulnerabilities

Publication date

18 September 2013

Overview

Several security issues were fixed in libvirt.

Releases

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)

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
13.04 raring libvirt0 –  1.0.2-0ubuntu11.13.04.4
libvirt-bin –  1.0.2-0ubuntu11.13.04.4
12.10 quantal libvirt0 –  0.9.13-0ubuntu12.5
libvirt-bin –  0.9.13-0ubuntu12.5
12.04 precise libvirt0 –  0.9.8-2ubuntu17.13
libvirt-bin –  0.9.8-2ubuntu17.13
10.04 lucid libvirt0 –  0.7.5-5ubuntu27.24
libvirt-bin –  0.7.5-5ubuntu27.24

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References

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