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Ubuntu Security Notice USN-4011-2

Ubuntu Security Notice USN-4011-2
Posted Jun 6, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4011-2 - USN-4011-1 fixed several vulnerabilities in Jinja2. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Olivier Dony discovered that Jinja incorrectly handled str.format. An attacker could possibly use this issue to escape the sandbox. Various other issues were also addressed.

tags | advisory, vulnerability
systems | linux, ubuntu
advisories | CVE-2016-10745, CVE-2019-10906
MD5 | 334f54291ccbae418a095a0d4322c3fc

Ubuntu Security Notice USN-4011-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4011-2
June 06, 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

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

References:
https://usn.ubuntu.com/4011-2
https://usn.ubuntu.com/4011-1
CVE-2016-10745, CVE-2019-10906

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