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.
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Ubuntu Security Notice USN-1618-1
October 26, 2012
exim4 vulnerability
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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