USN-4011-2: Jinja2 vulnerabilities

6 June 2019

jinja2 vulnerabilities

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

  • Ubuntu 14.04 ESM
  • Ubuntu 12.04 ESM

Summary

Several security issues were fixed in Jinja2.

Software Description

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

Details

USN-4011-1 fixed several vulnerabilities in Jinja2. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Olivier Dony discovered that Jinja incorrectly handled str.format. An attacker could possibly use this issue to escape the sandbox. (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 14.04 ESM
python-jinja2 - 2.7.2-2ubuntu0.1~esm1
python3-jinja2 - 2.7.2-2ubuntu0.1~esm1
Ubuntu 12.04 ESM
python-jinja2 - 2.6-1ubuntu0.2
python3-jinja2 - 2.6-1ubuntu0.2

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