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Ubuntu Security Notice USN-1135-1

Ubuntu Security Notice USN-1135-1
Posted May 26, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1135-1 - 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.

tags | advisory, remote, arbitrary
systems | linux, ubuntu
advisories | CVE-2011-1407
MD5 | 7cd56abe04fa6ff5de5c6a47f677b9a3

Ubuntu Security Notice USN-1135-1

Change Mirror Download
==========================================================================
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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