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Ubuntu: Security update for libxml2

Juri Aedla discovered that libxml2 incorrectly handled certain memory operations. If a user or application linked against libxml2 were tricked into opening a specially crafted XML file, an attacker could cause the application to crash or possibly execute arbitrary code with the privileges of the user invoking the program. Updated packages are available from security.ubuntu.com.

==========================================================================
Ubuntu Security Notice USN-1587-1
September 27, 2012

libxml2 vulnerability
==========================================================================

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

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

Applications using libxml2 could be made to crash or run programs as your
login if they opened a specially crafted file.

Software Description:
- libxml2: GNOME XML library

Details:

Juri Aedla discovered that libxml2 incorrectly handled certain memory
operations. If a user or application linked against libxml2 were tricked
into opening a specially crafted XML file, an attacker could cause the
application to crash or possibly execute arbitrary code with the privileges
of the user invoking the program.

Update instructions:

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

Ubuntu 12.04 LTS:
 libxml2                         2.7.8.dfsg-5.1ubuntu4.2

Ubuntu 11.10:
 libxml2                         2.7.8.dfsg-4ubuntu0.4

Ubuntu 11.04:
 libxml2                         2.7.8.dfsg-2ubuntu0.5

Ubuntu 10.04 LTS:
 libxml2                         2.7.6.dfsg-1ubuntu1.6

Ubuntu 8.04 LTS:
 libxml2                         2.6.31.dfsg-2ubuntu1.10

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
 http://www.ubuntu.com/usn/usn-1587-1
 CVE-2012-2807

Package Information:
 https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-5.1ubuntu4.2
 https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-4ubuntu0.4
 https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-2ubuntu0.5
 https://launchpad.net/ubuntu/+source/libxml2/2.7.6.dfsg-1ubuntu1.6
 https://launchpad.net/ubuntu/+source/libxml2/2.6.31.dfsg-2ubuntu1.10
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