USN-6394-1 fixed a vulnerability in Python. This update provides the corresponding update for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
Original advisory details:
It was discovered that Python incorrectly handled certain scripts. An attacker could possibly use this issue to execute arbitrary code or cause a crash.
2.7.6-8ubuntu0.6+esm172.7.12-1ubuntu0~16.04.18+esm82.7.17-1~18.04ubuntu1.13+esm3