USN-2431-2: MAAS regression

4 December 2014

maas regression

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

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


USN-2431-1 caused a regression in the MAAS package.

Software Description

  • maas - Ubuntu MAAS Server


USN-2431-1 fixed vulnerabilities in mod_wsgi. The security update exposed an issue in the MAAS package, causing a regression. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that mod_wsgi incorrectly handled errors when setting up the working directory and group access rights. A malicious application could possibly use this issue to cause a local privilege escalation when using daemon mode.

Update instructions

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

Ubuntu 14.10
maas-region-controller-min - 1.7.0~beta8+bzr3272-0ubuntu1.2
Ubuntu 14.04 LTS
maas-region-controller-min - 1.5.4+bzr2294-0ubuntu1.2
Ubuntu 12.04 LTS
maas-region-controller - 1.2+bzr1373+dfsg-0ubuntu1~12.04.6

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.