USN-1465-1: Ubuntu One Client vulnerability

6 June 2012

ubuntuone-client vulnerability

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

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.04 LTS


Fraudulent security certificates could allow sensitive information to be exposed when accessing the Internet.

Software Description

  • ubuntuone-client - Ubuntu One client


It was discovered that the Ubuntu One Client incorrectly validated server certificates when using HTTPS connections. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to alter or compromise confidential information.

Update instructions

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

Ubuntu 12.04 LTS
python-ubuntuone-client - 3.0.0-0ubuntu1.1
Ubuntu 11.10
python-ubuntuone-client - 2.0.1-0ubuntu1.1
Ubuntu 11.04
python-ubuntuone-client - 1.6.2-0ubuntu2.1
Ubuntu 10.04 LTS
python-ubuntuone-client - 1.2.2-0ubuntu2.2

To update your system, please follow these instructions:

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