[USN-5225-1] lxml vulnerability

========================================================================== Ubuntu Security Notice USN-5225-1 January 12, 2022
lxml vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – Ubuntu 21.04 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS – Ubuntu 16.04 ESM – Ubuntu 14.04 ESM
Summary:
lxml could be made to execute arbitrary code if it received a specially crafted XML or HTML file.
Software Description: – lxml: pythonic binding for the libxml2 and libxslt libraries
Details:
It was discovered that lxml incorrectly handled certain XML and HTML files. An attacker could possibly use this issue to execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10: python3-lxml 4.6.3+dfsg-0.1ubuntu0.2
Ubuntu 21.04: python3-lxml 4.6.3-1ubuntu0.2
Ubuntu 20.04 LTS: python-lxml 4.5.0-1ubuntu0.5 python3-lxml 4.5.0-1ubuntu0.5
Ubuntu 18.04 LTS: python-lxml 4.2.1-1ubuntu0.6 python3-lxml 4.2.1-1ubuntu0.6
Ubuntu 16.04 ESM: python-lxml 3.5.0-1ubuntu0.4+esm2 python3-lxml 3.5.0-1ubuntu0.4+esm2
Ubuntu 14.04 ESM: python-lxml 3.3.3-1ubuntu0.2+esm5 python3-lxml 3.3.3-1ubuntu0.2+esm5
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5225-1 CVE-2021-43818
Package Information: launchpad.net/ubuntu/+source/lxml/4.6.3+dfsg-0.1ubuntu0.2 launchpad.net/ubuntu/+source/lxml/4.6.3-1ubuntu0.2 launchpad.net/ubuntu/+source/lxml/4.5.0-1ubuntu0.5 launchpad.net/ubuntu/+source/lxml/4.2.1-1ubuntu0.6