=========================================================================Ubuntu Security Notice USN-2183-1
April 28, 2014

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

- Ubuntu 14.04 LTS
- Ubuntu 13.10
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

A malicious source package could write files outside the unpack directory.

Software Description:
- dpkg: Debian package management system

Details:

Jakub Wilk discovered that dpkg incorrectly certain paths and symlinks when
unpacking source packages. If a user or an automated system were tricked
into unpacking a specially crafted source package, a remote attacker could
modify files outside the target unpack directory, leading to a denial of
service or potentially gaining access to the system.

Update instructions:

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

Ubuntu 14.04 LTS:
  libdpkg-perl                    1.17.5ubuntu5.1

Ubuntu 13.10:
  libdpkg-perl                    1.16.12ubuntu1.1

Ubuntu 12.10:
  libdpkg-perl                    1.16.7ubuntu6.1

Ubuntu 12.04 LTS:
  libdpkg-perl                    1.16.1.2ubuntu7.3

Ubuntu 10.04 LTS:
  dpkg-dev                        1.15.5.6ubuntu4.7

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

References:
  https://ubuntu.com/security/notices/USN-2183-1
  CVE-2014-0471

Package Information:
  https://launchpad.net/ubuntu/+source/dpkg/1.17.5ubuntu5.1
  https://launchpad.net/ubuntu/+source/dpkg/1.16.12ubuntu1.1
  https://launchpad.net/ubuntu/+source/dpkg/1.16.7ubuntu6.1
  https://launchpad.net/ubuntu/+source/dpkg/1.16.1.2ubuntu7.3
  https://launchpad.net/ubuntu/+source/dpkg/1.15.5.6ubuntu4.7