USN-4011-1: Jinja2 vulnerabilities

6 June 2019

jinja2 vulnerabilities

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

  • Ubuntu 19.04
  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS

Summary

Several security issues were fixed in Jinja2.

Software Description

  • jinja2 - small but fast and easy to use stand-alone template engine

Details

Olivier Dony discovered that Jinja incorrectly handled str.format. An attacker could possibly use this issue to escape the sandbox. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-10745)

Brian Welch discovered that Jinja incorrectly handled str.format_map. An attacker could possibly use this issue to escape the sandbox. (CVE-2019-10906)

Update instructions

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

Ubuntu 19.04
python-jinja2 - 2.10-1ubuntu0.19.04.1
python3-jinja2 - 2.10-1ubuntu0.19.04.1
Ubuntu 18.10
python-jinja2 - 2.10-1ubuntu0.18.10.1
python3-jinja2 - 2.10-1ubuntu0.18.10.1
Ubuntu 18.04 LTS
python-jinja2 - 2.10-1ubuntu0.18.04.1
python3-jinja2 - 2.10-1ubuntu0.18.04.1
Ubuntu 16.04 LTS
python-jinja2 - 2.8-1ubuntu0.1
python3-jinja2 - 2.8-1ubuntu0.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References