[USN-2183-2] dpkg vulnerability

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==========================================================================
Ubuntu Security Notice USN-2183-2
May 01, 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:

USN-2183-1 fixed a vulnerability in dpkg. Javier Serrano Polo discovered
that the fix introduced a vulnerability in releases with an older version
of the patch utility. This update fixes the problem.

Original advisory 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 1.17.5ubuntu5.2

Ubuntu 13.10:
libdpkg-perl 1.16.12ubuntu1.2

Ubuntu 12.10:
libdpkg-perl 1.16.7ubuntu6.2

Ubuntu 12.04 LTS:
libdpkg-perl 1.16.1.2ubuntu7.4

Ubuntu 10.04 LTS:
dpkg-dev 1.15.5.6ubuntu4.8

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

References:
http://www.ubuntu.com/usn/usn-2183-2
http://www.ubuntu.com/usn/usn-2183-1
CVE-2014-0471

Package Information:
https://launchpad.net/ubuntu/+source/dpkg/1.17.5ubuntu5.2
https://launchpad.net/ubuntu/+source/dpkg/1.16.12ubuntu1.2
https://launchpad.net/ubuntu/+source/dpkg/1.16.7ubuntu6.2
https://launchpad.net/ubuntu/+source/dpkg/1.16.1.2ubuntu7.4
https://launchpad.net/ubuntu/+source/dpkg/1.15.5.6ubuntu4.8