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Ubuntu Security Notice USN-1618-1

Ubuntu Security Notice USN-1618-1
Posted Oct 26, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1618-1 - It was discovered that Exim incorrectly handled DKIM DNS decoding. This flaw could allow a remote attacker to execute arbitrary code.

tags | advisory, remote, arbitrary
systems | linux, ubuntu
advisories | CVE-2012-5671
SHA-256 | 1aa6092f2eedee2d304f571946cd33139c425f5a72ba8acf5eae714670a9a625

Ubuntu Security Notice USN-1618-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-1618-1
October 26, 2012

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

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

- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS

Summary:

Exim could be made to run programs if it received specially crafted network
traffic.

Software Description:
- exim4: Exim is a mail transport agent

Details:

It was discovered that Exim incorrectly handled DKIM DNS decoding. This
flaw could allow a remote attacker to execute arbitrary code.

Update instructions:

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

Ubuntu 12.10:
exim4-daemon-custom 4.80-3ubuntu1.1
exim4-daemon-heavy 4.80-3ubuntu1.1
exim4-daemon-light 4.80-3ubuntu1.1

Ubuntu 12.04 LTS:
exim4-daemon-custom 4.76-3ubuntu3.1
exim4-daemon-heavy 4.76-3ubuntu3.1
exim4-daemon-light 4.76-3ubuntu3.1

Ubuntu 11.10:
exim4-daemon-custom 4.76-2ubuntu1.1
exim4-daemon-heavy 4.76-2ubuntu1.1
exim4-daemon-light 4.76-2ubuntu1.1

Ubuntu 11.04:
exim4-daemon-custom 4.74-1ubuntu1.3
exim4-daemon-heavy 4.74-1ubuntu1.3
exim4-daemon-light 4.74-1ubuntu1.3

Ubuntu 10.04 LTS:
exim4-daemon-custom 4.71-3ubuntu1.4
exim4-daemon-heavy 4.71-3ubuntu1.4
exim4-daemon-light 4.71-3ubuntu1.4

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

References:
http://www.ubuntu.com/usn/usn-1618-1
CVE-2012-5671

Package Information:
https://launchpad.net/ubuntu/+source/exim4/4.80-3ubuntu1.1
https://launchpad.net/ubuntu/+source/exim4/4.76-3ubuntu3.1
https://launchpad.net/ubuntu/+source/exim4/4.76-2ubuntu1.1
https://launchpad.net/ubuntu/+source/exim4/4.74-1ubuntu1.3
https://launchpad.net/ubuntu/+source/exim4/4.71-3ubuntu1.4
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