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Ubuntu Security Notice USN-1465-2

Ubuntu Security Notice USN-1465-2
Posted Jun 6, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1465-2 - USN-1465-1 fixed a vulnerability in the Ubuntu One Client. This update adds a required fix to the Ubuntu One storage protocol library. 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. Various other issues were also addressed.

tags | advisory, remote, web, protocol
systems | linux, ubuntu
advisories | CVE-2011-4409
SHA-256 | bfc4b1a4f40b1086e4a2f1209aef6c19231f1edd3f5e17263857e268a19058a8

Ubuntu Security Notice USN-1465-2

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-1465-2
June 06, 2012

ubuntuone-storage-protocol update
============================================================================

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

Summary:

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

Software Description:
- ubuntuone-storage-protocol: Python library for Ubuntu One file storage and sharing service

Details:

USN-1465-1 fixed a vulnerability in the Ubuntu One Client. This update adds
a required fix to the Ubuntu One storage protocol library.

Original advisory details:

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-storageprotocol 3.0.0-0ubuntu1.1

Ubuntu 11.10:
python-ubuntuone-storageprotocol 2.0.1-0ubuntu1.1

Ubuntu 11.04:
python-ubuntuone-storageprotocol 1.6.1-0ubuntu1.2

Ubuntu 10.04 LTS:
python-ubuntuone-storageprotocol 1.2.0-0ubuntu1.1

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

References:
http://www.ubuntu.com/usn/usn-1465-2
http://www.ubuntu.com/usn/usn-1465-1
CVE-2011-4409

Package Information:
https://launchpad.net/ubuntu/+source/ubuntuone-storage-protocol/3.0.0-0ubuntu1.1
https://launchpad.net/ubuntu/+source/ubuntuone-storage-protocol/2.0.1-0ubuntu1.1
https://launchpad.net/ubuntu/+source/ubuntuone-storage-protocol/1.6.1-0ubuntu1.2
https://launchpad.net/ubuntu/+source/ubuntuone-storage-protocol/1.2.0-0ubuntu1.1
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