USN-4011-2: Jinja2 vulnerabilities

USN-4011-2: Jinja2 vulnerabilities

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

• USN-4011-1
• CVE-2016-10745
• CVE-2019-10906

Source: USN-4011-2: Jinja2 vulnerabilities