U radu programskog paketa Ubuntu One Couch otkriven je nedostatak kojeg zlonamjeni napadači mogu iskoristiti za MITM napad te otkrivanje i izmjenu osjetljivih informacija.

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Ubuntu Security Notice USN-1381-1
March 01, 2012

ubuntuone-couch vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.10

Summary:

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

Software Description:
- ubuntuone-couch: Ubuntu One CouchDB

Details:

It was discovered that Ubuntu One Couch did not perform any server
certificate validation 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 11.10:
  ubuntuone-couch                 0.3.0-0ubuntu2.1

After a standard system update you need to restart your session to make
all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1381-1
  https://launchpad.net/bugs/882049

Package Information:
  https://launchpad.net/ubuntu/+source/ubuntuone-couch/0.3.0-0ubuntu2.1