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Ubuntu Security Notice USN-2566-1
April 09, 2015

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

– Ubuntu 14.10
– Ubuntu 14.04 LTS
– Ubuntu 12.04 LTS
– Ubuntu 10.04 LTS

Summary:

dpkg could be tricked into bypassing source package signature checks.

Software Description:
– dpkg: Debian package management system

Details:

Jann Horn discovered that dpkg incorrectly validated signatures when
extracting local source packages. If a user or an automated system were
tricked into unpacking a specially crafted source package, a remote
attacker could bypass signature verification checks.

Update instructions:

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

Ubuntu 14.10:
libdpkg-perl 1.17.13ubuntu1.1

Ubuntu 14.04 LTS:
libdpkg-perl 1.17.5ubuntu5.4

Ubuntu 12.04 LTS:
libdpkg-perl 1.16.1.2ubuntu7.6

Ubuntu 10.04 LTS:
dpkg-dev 1.15.5.6ubuntu4.10

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

References:
http://www.ubuntu.com/usn/usn-2566-1
CVE-2015-0840

Package Information:
https://launchpad.net/ubuntu/+source/dpkg/1.17.13ubuntu1.1
https://launchpad.net/ubuntu/+source/dpkg/1.17.5ubuntu5.4
https://launchpad.net/ubuntu/+source/dpkg/1.16.1.2ubuntu7.6
https://launchpad.net/ubuntu/+source/dpkg/1.15.5.6ubuntu4.10

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