[USN-6599-1] Jinja2 vulnerabilities

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Ubuntu Security Notice USN-6599-1
January 25, 2024

jinja2 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in jinja2.

Software Description:
- jinja2: documentation for the Jinja2 Python library

Details:

Yeting Li discovered that Jinja incorrectly handled certain regex.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 14.04 LTS, Ubuntu 18.04 LTS, and
Ubuntu 20.04 LTS. (CVE-2020-28493)

It was discovered that Jinja incorrectly handled certain HTML passed with
xmlatter filter. An attacker could inject arbitrary HTML attributes
keys and values potentially leading to XSS. (CVE-2024-22195)

Update instructions:

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

Ubuntu 23.10:
python3-jinja2 3.1.2-1ubuntu0.23.10.1

Ubuntu 22.04 LTS:
python3-jinja2 3.0.3-1ubuntu0.1

Ubuntu 20.04 LTS:
python-jinja2 2.10.1-2ubuntu0.2
python3-jinja2 2.10.1-2ubuntu0.2

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
python-jinja2 2.10-1ubuntu0.18.04.1+esm1
python3-jinja2 2.10-1ubuntu0.18.04.1+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
python-jinja2 2.8-1ubuntu0.1+esm2
python3-jinja2 2.8-1ubuntu0.1+esm2

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
python-jinja2 2.7.2-2ubuntu0.1~esm2
python3-jinja2 2.7.2-2ubuntu0.1~esm2

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-6599-1
CVE-2020-28493, CVE-2024-22195

Package Information:
https://launchpad.net/ubuntu/+source/jinja2/3.1.2-1ubuntu0.23.10.1
https://launchpad.net/ubuntu/+source/jinja2/3.0.3-1ubuntu0.1
https://launchpad.net/ubuntu/+source/jinja2/2.10.1-2ubuntu0.2