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==========================================================================
Ubuntu Security Notice USN-1352-1
January 31, 2012

software-properties vulnerability
==========================================================================

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

- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS

Summary:

Software Properties could be tricked into installing arbitrary PPA GPG
keys.

Software Description:
- software-properties: manage the repositories that you install software from

Details:

David Black discovered that Software Properties incorrectly validated
server certificates when performing secure connections to download PPA GPG
key fingerprints. If a remote attacker were able to perform a
man-in-the-middle attack, this flaw could be exploited to install altered
package repository GPG keys.

Update instructions:

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

Ubuntu 11.10:
  python-software-properties      0.81.13.3

Ubuntu 11.04:
  python-software-properties      0.80.9.1

Ubuntu 10.10:
  python-software-properties      0.76.7.1

Ubuntu 10.04 LTS:
  python-software-properties      0.75.10.2

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

References:
  http://www.ubuntu.com/usn/usn-1352-1
  CVE-2011-4407

Package Information:
  https://launchpad.net/ubuntu/+source/software-properties/0.81.13.3
  https://launchpad.net/ubuntu/+source/software-properties/0.80.9.1
  https://launchpad.net/ubuntu/+source/software-properties/0.76.7.1
  https://launchpad.net/ubuntu/+source/software-properties/0.75.10.2


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