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==========================================================================
Ubuntu Security Notice USN-1135-1
May 25, 2011

exim4 vulnerability
==========================================================================

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

- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS

Summary:

An attacker could send crafted input to Exim and cause it to run programs
as the Exim user.

Software Description:
- exim4: metapackage to ease Exim MTA (v4) installation

Details:

It was discovered that the Exim daemon did not correctly handle certain
DKIM identities. A remote attacker could send specially crafted email to
run arbitrary code as the Exim user.

Update instructions:

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

Ubuntu 11.04:
  exim4-daemon-custom             4.74-1ubuntu1.2
  exim4-daemon-heavy              4.74-1ubuntu1.2
  exim4-daemon-light              4.74-1ubuntu1.2

Ubuntu 10.10:
  exim4-daemon-custom             4.72-1ubuntu1.3
  exim4-daemon-heavy              4.72-1ubuntu1.3
  exim4-daemon-light              4.72-1ubuntu1.3

Ubuntu 10.04 LTS:
  exim4-daemon-custom             4.71-3ubuntu1.3
  exim4-daemon-heavy              4.71-3ubuntu1.3
  exim4-daemon-light              4.71-3ubuntu1.3

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

References:
  CVE-2011-1407

Package Information:
  https://launchpad.net/ubuntu/+source/exim4/4.74-1ubuntu1.2
  https://launchpad.net/ubuntu/+source/exim4/4.72-1ubuntu1.3
  https://launchpad.net/ubuntu/+source/exim4/4.71-3ubuntu1.3


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