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Ubuntu Security Notice USN-1656-1

Ubuntu Security Notice USN-1656-1
Posted Dec 5, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1656-1 - It was discovered that libxml2 had a heap-based buffer underflow when parsing entities. If a user or automated system were tricked into processing a specially crafted XML document, applications linked against libxml2 could be made to crash or possibly execute arbitrary code.

tags | advisory, arbitrary
systems | linux, ubuntu
advisories | CVE-2012-5134
MD5 | efe55fb8db2ebb47d1d137bc5c1d398d

Ubuntu Security Notice USN-1656-1

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Content-Disposition: inline

==========================================================================Ubuntu Security Notice USN-1656-1
December 06, 2012

libxml2 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- 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:

It was discovered that libxml2 had a heap-based buffer underflow
when parsing entities. If a user or automated system were tricked into
processing a specially crafted XML document, applications linked against
libxml2 could be made to crash or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 12.10:
libxml2 2.8.0+dfsg1-5ubuntu2.1

Ubuntu 12.04 LTS:
libxml2 2.7.8.dfsg-5.1ubuntu4.3

Ubuntu 11.10:
libxml2 2.7.8.dfsg-4ubuntu0.5

Ubuntu 10.04 LTS:
libxml2 2.7.6.dfsg-1ubuntu1.7

Ubuntu 8.04 LTS:
libxml2 2.6.31.dfsg-2ubuntu1.11

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

References:
http://www.ubuntu.com/usn/usn-1656-1
CVE-2012-5134

Package Information:
https://launchpad.net/ubuntu/+source/libxml2/2.8.0+dfsg1-5ubuntu2.1
https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-5.1ubuntu4.3
https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-4ubuntu0.5
https://launchpad.net/ubuntu/+source/libxml2/2.7.6.dfsg-1ubuntu1.7
https://launchpad.net/ubuntu/+source/libxml2/2.6.31.dfsg-2ubuntu1.11

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