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Ubuntu Security Notice USN-2217-1
May 21, 2014

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

– Ubuntu 14.04 LTS
– Ubuntu 13.10
– Ubuntu 12.04 LTS

Summary:

lxml could allow cross-site scripting (XSS) attacks.

Software Description:
– lxml: pythonic binding for the libxml2 and libxslt libraries

Details:

It was discovered that the lxml.html.clean module incorrectly stripped
control characters. An attacked could potentially exploit this to conduct
cross-site scripting (XSS) attacks.

Update instructions:

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

Ubuntu 14.04 LTS:
python-lxml 3.3.3-1ubuntu0.1
python3-lxml 3.3.3-1ubuntu0.1

Ubuntu 13.10:
python-lxml 3.2.0-1ubuntu0.1
python3-lxml 3.2.0-1ubuntu0.1

Ubuntu 12.04 LTS:
python-lxml 2.3.2-1ubuntu0.2
python3-lxml 2.3.2-1ubuntu0.2

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

References:
http://www.ubuntu.com/usn/usn-2217-1
CVE-2014-3146

Package Information:
https://launchpad.net/ubuntu/+source/lxml/3.3.3-1ubuntu0.1
https://launchpad.net/ubuntu/+source/lxml/3.2.0-1ubuntu0.1
https://launchpad.net/ubuntu/+source/lxml/2.3.2-1ubuntu0.2

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