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.
16cfaa3e64480ac0a258651131028577af813ae90b7648d6be5ddd582e0f8829